./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-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_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/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_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/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_af3f04ad-86d7-4a4c-a68e-5492c056434e/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 1fce3ed74716f3f59c3fa2884d7c5494e1e275b70dea673513aba192c84a625f
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 23:41:38,508 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 23:41:38,573 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 23:41:38,577 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 23:41:38,578 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 23:41:38,602 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 23:41:38,603 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 23:41:38,604 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 23:41:38,604 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 23:41:38,605 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 23:41:38,605 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 23:41:38,606 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 23:41:38,607 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 23:41:38,607 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 23:41:38,608 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 23:41:38,608 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 23:41:38,609 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 23:41:38,609 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 23:41:38,610 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 23:41:38,610 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 23:41:38,611 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 23:41:38,615 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 23:41:38,615 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 23:41:38,616 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 23:41:38,616 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 23:41:38,617 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 23:41:38,617 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 23:41:38,617 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 23:41:38,618 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:41:38,618 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 23:41:38,618 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 23:41:38,619 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 23:41:38,619 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 23:41:38,619 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 23:41:38,619 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 23:41:38,620 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 23:41:38,620 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 23:41:38,620 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 23:41:38,620 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 23:41:38,620 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_af3f04ad-86d7-4a4c-a68e-5492c056434e/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_af3f04ad-86d7-4a4c-a68e-5492c056434e/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 -> 1fce3ed74716f3f59c3fa2884d7c5494e1e275b70dea673513aba192c84a625f
[2023-11-28 23:41:38,830 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 23:41:38,851 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 23:41:38,853 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 23:41:38,854 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 23:41:38,855 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 23:41:38,856 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c
[2023-11-28 23:41:41,633 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 23:41:42,061 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 23:41:42,062 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c
[2023-11-28 23:41:42,087 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/data/8f0b903b7/38da6edaa1794d7d86e600dfba52e6a9/FLAG9b8e66e09
[2023-11-28 23:41:42,102 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/data/8f0b903b7/38da6edaa1794d7d86e600dfba52e6a9
[2023-11-28 23:41:42,105 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 23:41:42,107 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 23:41:42,108 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 23:41:42,109 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 23:41:42,114 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 23:41:42,115 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:41:42" (1/1) ...
[2023-11-28 23:41:42,116 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590187d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:42, skipping insertion in model container
[2023-11-28 23:41:42,116 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:41:42" (1/1) ...
[2023-11-28 23:41:42,253 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 23:41:42,485 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_af3f04ad-86d7-4a4c-a68e-5492c056434e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c[1170,1183]
[2023-11-28 23:41:43,187 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:41:43,198 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 23:41:43,210 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_af3f04ad-86d7-4a4c-a68e-5492c056434e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.at.7.prop1-back-serstep.c[1170,1183]
[2023-11-28 23:41:43,628 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:41:43,642 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 23:41:43,642 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43 WrapperNode
[2023-11-28 23:41:43,643 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 23:41:43,644 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 23:41:43,644 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 23:41:43,644 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 23:41:43,651 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:43,762 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:45,490 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22902
[2023-11-28 23:41:45,491 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 23:41:45,491 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 23:41:45,492 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 23:41:45,492 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 23:41:45,502 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:45,502 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:45,995 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:46,272 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-28 23:41:46,273 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:46,273 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:46,790 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:46,889 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:47,023 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:47,092 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:47,442 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 23:41:47,443 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 23:41:47,443 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 23:41:47,444 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 23:41:47,444 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (1/1) ...
[2023-11-28 23:41:47,450 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:41:47,461 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:41:47,474 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 23:41:47,477 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 23:41:47,511 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 23:41:47,511 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 23:41:47,511 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 23:41:47,511 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 23:41:48,503 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 23:41:48,505 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 23:42:00,094 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 23:42:00,388 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 23:42:00,389 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 23:42:00,391 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:42:00 BoogieIcfgContainer
[2023-11-28 23:42:00,392 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 23:42:00,394 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 23:42:00,395 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 23:42:00,398 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 23:42:00,398 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:41:42" (1/3) ...
[2023-11-28 23:42:00,399 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4d926d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:42:00, skipping insertion in model container
[2023-11-28 23:42:00,399 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:41:43" (2/3) ...
[2023-11-28 23:42:00,400 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4d926d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:42:00, skipping insertion in model container
[2023-11-28 23:42:00,400 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:42:00" (3/3) ...
[2023-11-28 23:42:00,401 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.at.7.prop1-back-serstep.c
[2023-11-28 23:42:00,420 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 23:42:00,420 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 23:42:00,548 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 23:42:00,555 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;@469cc063, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 23:42:00,555 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 23:42:00,573 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5081 states, 5079 states have (on average 1.6666666666666667) internal successors, (8465), 5080 states have internal predecessors, (8465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:00,619 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 793
[2023-11-28 23:42:00,619 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:00,621 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]
[2023-11-28 23:42:00,622 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:00,627 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:00,628 INFO  L85        PathProgramCache]: Analyzing trace with hash 1524897517, now seen corresponding path program 1 times
[2023-11-28 23:42:00,636 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:00,636 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110716899]
[2023-11-28 23:42:00,636 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:00,637 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:01,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:04,998 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:42:04,998 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:04,999 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110716899]
[2023-11-28 23:42:05,000 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110716899] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:05,000 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:05,000 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:42:05,002 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415403924]
[2023-11-28 23:42:05,003 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:05,010 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:42:05,010 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:05,043 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:42:05,044 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:42:05,063 INFO  L87              Difference]: Start difference. First operand  has 5081 states, 5079 states have (on average 1.6666666666666667) internal successors, (8465), 5080 states have internal predecessors, (8465), 0 states have call successors, (0), 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 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:05,460 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:05,461 INFO  L93              Difference]: Finished difference Result 9909 states and 16511 transitions.
[2023-11-28 23:42:05,462 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:42:05,464 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 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 792
[2023-11-28 23:42:05,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:05,510 INFO  L225             Difference]: With dead ends: 9909
[2023-11-28 23:42:05,510 INFO  L226             Difference]: Without dead ends: 5081
[2023-11-28 23:42:05,522 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:42:05,526 INFO  L413           NwaCegarLoop]: 8458 mSDtfsCounter, 1 mSDsluCounter, 16911 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25369 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:05,527 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25369 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:05,560 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5081 states.
[2023-11-28 23:42:05,715 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 5081.
[2023-11-28 23:42:05,729 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5081 states, 5080 states have (on average 1.6659448818897638) internal successors, (8463), 5080 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:05,755 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 8463 transitions.
[2023-11-28 23:42:05,757 INFO  L78                 Accepts]: Start accepts. Automaton has 5081 states and 8463 transitions. Word has length 792
[2023-11-28 23:42:05,759 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:05,760 INFO  L495      AbstractCegarLoop]: Abstraction has 5081 states and 8463 transitions.
[2023-11-28 23:42:05,761 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:05,761 INFO  L276                IsEmpty]: Start isEmpty. Operand 5081 states and 8463 transitions.
[2023-11-28 23:42:05,789 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 794
[2023-11-28 23:42:05,789 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:05,790 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]
[2023-11-28 23:42:05,791 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 23:42:05,791 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:05,792 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:05,792 INFO  L85        PathProgramCache]: Analyzing trace with hash 28972029, now seen corresponding path program 1 times
[2023-11-28 23:42:05,793 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:05,793 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122685166]
[2023-11-28 23:42:05,793 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:05,794 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:06,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:07,941 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:42:07,942 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:07,942 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122685166]
[2023-11-28 23:42:07,942 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122685166] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:07,943 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:07,943 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:42:07,943 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607442796]
[2023-11-28 23:42:07,943 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:07,947 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:42:07,947 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:07,949 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:42:07,949 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:42:07,950 INFO  L87              Difference]: Start difference. First operand 5081 states and 8463 transitions. Second operand  has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:08,214 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:08,215 INFO  L93              Difference]: Finished difference Result 9912 states and 16509 transitions.
[2023-11-28 23:42:08,215 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:42:08,216 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 0 states have call successors, (0), 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 793
[2023-11-28 23:42:08,218 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:08,247 INFO  L225             Difference]: With dead ends: 9912
[2023-11-28 23:42:08,247 INFO  L226             Difference]: Without dead ends: 5084
[2023-11-28 23:42:08,255 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:42:08,256 INFO  L413           NwaCegarLoop]: 8458 mSDtfsCounter, 1 mSDsluCounter, 16909 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25367 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:08,257 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25367 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:08,270 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5084 states.
[2023-11-28 23:42:08,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 5083.
[2023-11-28 23:42:08,380 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5083 states, 5082 states have (on average 1.6656828020464385) internal successors, (8465), 5082 states have internal predecessors, (8465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:08,404 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 8465 transitions.
[2023-11-28 23:42:08,404 INFO  L78                 Accepts]: Start accepts. Automaton has 5083 states and 8465 transitions. Word has length 793
[2023-11-28 23:42:08,406 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:08,406 INFO  L495      AbstractCegarLoop]: Abstraction has 5083 states and 8465 transitions.
[2023-11-28 23:42:08,407 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:08,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 5083 states and 8465 transitions.
[2023-11-28 23:42:08,416 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 795
[2023-11-28 23:42:08,416 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:08,417 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]
[2023-11-28 23:42:08,417 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 23:42:08,418 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:08,418 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:08,419 INFO  L85        PathProgramCache]: Analyzing trace with hash 685917701, now seen corresponding path program 1 times
[2023-11-28 23:42:08,419 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:08,420 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238795665]
[2023-11-28 23:42:08,420 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:08,421 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:08,762 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:10,241 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:42:10,241 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:10,243 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238795665]
[2023-11-28 23:42:10,243 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238795665] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:10,244 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:10,244 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:42:10,244 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296609800]
[2023-11-28 23:42:10,245 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:10,246 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:42:10,246 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:10,248 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:42:10,252 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 23:42:10,254 INFO  L87              Difference]: Start difference. First operand 5083 states and 8465 transitions. Second operand  has 5 states, 5 states have (on average 158.8) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:10,788 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:10,788 INFO  L93              Difference]: Finished difference Result 15660 states and 26083 transitions.
[2023-11-28 23:42:10,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 23:42:10,789 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 158.8) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 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 794
[2023-11-28 23:42:10,791 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:10,849 INFO  L225             Difference]: With dead ends: 15660
[2023-11-28 23:42:10,849 INFO  L226             Difference]: Without dead ends: 10830
[2023-11-28 23:42:10,858 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:42:10,860 INFO  L413           NwaCegarLoop]: 9997 mSDtfsCounter, 33312 mSDsluCounter, 16910 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33312 SdHoareTripleChecker+Valid, 26907 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:10,860 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [33312 Valid, 26907 Invalid, 16 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:10,879 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10830 states.
[2023-11-28 23:42:11,020 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10830 to 6009.
[2023-11-28 23:42:11,032 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6009 states, 6008 states have (on average 1.665612516644474) internal successors, (10007), 6008 states have internal predecessors, (10007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:11,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 10007 transitions.
[2023-11-28 23:42:11,054 INFO  L78                 Accepts]: Start accepts. Automaton has 6009 states and 10007 transitions. Word has length 794
[2023-11-28 23:42:11,055 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:11,055 INFO  L495      AbstractCegarLoop]: Abstraction has 6009 states and 10007 transitions.
[2023-11-28 23:42:11,056 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 158.8) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:11,057 INFO  L276                IsEmpty]: Start isEmpty. Operand 6009 states and 10007 transitions.
[2023-11-28 23:42:11,365 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4012
[2023-11-28 23:42:11,366 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:11,368 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:42:11,369 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 23:42:11,369 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:11,369 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:11,371 INFO  L85        PathProgramCache]: Analyzing trace with hash -1000602156, now seen corresponding path program 1 times
[2023-11-28 23:42:11,371 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:11,372 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378869298]
[2023-11-28 23:42:11,372 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:11,372 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:11,952 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:11,953 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821060822]
[2023-11-28 23:42:11,954 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:11,955 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:11,955 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:11,959 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:11,960 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 23:42:16,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:16,373 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17369 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:42:16,472 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:16,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked.
[2023-11-28 23:42:16,902 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:16,902 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:16,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378869298]
[2023-11-28 23:42:16,902 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:16,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821060822]
[2023-11-28 23:42:16,903 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821060822] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:16,903 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:16,904 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:42:16,904 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979816996]
[2023-11-28 23:42:16,905 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:16,909 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:42:16,909 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:16,912 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:42:16,912 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:42:16,913 INFO  L87              Difference]: Start difference. First operand 6009 states and 10007 transitions. Second operand  has 8 states, 8 states have (on average 424.5) internal successors, (3396), 8 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:17,602 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:17,602 INFO  L93              Difference]: Finished difference Result 15666 states and 26089 transitions.
[2023-11-28 23:42:17,602 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:17,603 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 424.5) internal successors, (3396), 8 states have internal predecessors, (3396), 0 states have call successors, (0), 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 4011
[2023-11-28 23:42:17,611 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:17,640 INFO  L225             Difference]: With dead ends: 15666
[2023-11-28 23:42:17,641 INFO  L226             Difference]: Without dead ends: 10836
[2023-11-28 23:42:17,645 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4020 GetRequests, 4007 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-28 23:42:17,647 INFO  L413           NwaCegarLoop]: 9995 mSDtfsCounter, 22821 mSDsluCounter, 48417 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22821 SdHoareTripleChecker+Valid, 58412 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:17,647 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22821 Valid, 58412 Invalid, 58 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:17,660 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10836 states.
[2023-11-28 23:42:17,741 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10836 to 6009.
[2023-11-28 23:42:17,748 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6009 states, 6008 states have (on average 1.665612516644474) internal successors, (10007), 6008 states have internal predecessors, (10007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:17,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 10007 transitions.
[2023-11-28 23:42:17,757 INFO  L78                 Accepts]: Start accepts. Automaton has 6009 states and 10007 transitions. Word has length 4011
[2023-11-28 23:42:17,762 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:17,762 INFO  L495      AbstractCegarLoop]: Abstraction has 6009 states and 10007 transitions.
[2023-11-28 23:42:17,763 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 424.5) internal successors, (3396), 8 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:17,763 INFO  L276                IsEmpty]: Start isEmpty. Operand 6009 states and 10007 transitions.
[2023-11-28 23:42:17,838 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4013
[2023-11-28 23:42:17,838 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:17,841 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:42:17,898 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 23:42:18,042 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:18,043 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:18,043 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:18,044 INFO  L85        PathProgramCache]: Analyzing trace with hash 644228276, now seen corresponding path program 1 times
[2023-11-28 23:42:18,044 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:18,044 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074019064]
[2023-11-28 23:42:18,045 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:18,045 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:18,420 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:18,421 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073799886]
[2023-11-28 23:42:18,422 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:18,422 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:18,422 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:18,424 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:18,427 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 23:42:22,321 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:22,427 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17372 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:42:22,493 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:22,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked.
[2023-11-28 23:42:22,827 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:22,827 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:22,827 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074019064]
[2023-11-28 23:42:22,827 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:22,827 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073799886]
[2023-11-28 23:42:22,827 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073799886] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:22,827 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:22,829 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:42:22,829 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269007636]
[2023-11-28 23:42:22,829 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:22,834 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:42:22,834 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:22,837 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:42:22,837 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:42:22,838 INFO  L87              Difference]: Start difference. First operand 6009 states and 10007 transitions. Second operand  has 7 states, 7 states have (on average 485.57142857142856) internal successors, (3399), 7 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:23,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:23,495 INFO  L93              Difference]: Finished difference Result 15668 states and 26091 transitions.
[2023-11-28 23:42:23,495 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:23,496 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 485.57142857142856) internal successors, (3399), 7 states have internal predecessors, (3399), 0 states have call successors, (0), 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 4012
[2023-11-28 23:42:23,502 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:23,516 INFO  L225             Difference]: With dead ends: 15668
[2023-11-28 23:42:23,517 INFO  L226             Difference]: Without dead ends: 10835
[2023-11-28 23:42:23,523 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4021 GetRequests, 4009 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:42:23,524 INFO  L413           NwaCegarLoop]: 9990 mSDtfsCounter, 22820 mSDsluCounter, 38409 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22820 SdHoareTripleChecker+Valid, 48399 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:23,524 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22820 Valid, 48399 Invalid, 48 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:23,537 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10835 states.
[2023-11-28 23:42:23,630 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10835 to 6011.
[2023-11-28 23:42:23,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6011 states, 6010 states have (on average 1.6653910149750415) internal successors, (10009), 6010 states have internal predecessors, (10009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:23,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 10009 transitions.
[2023-11-28 23:42:23,645 INFO  L78                 Accepts]: Start accepts. Automaton has 6011 states and 10009 transitions. Word has length 4012
[2023-11-28 23:42:23,650 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:23,650 INFO  L495      AbstractCegarLoop]: Abstraction has 6011 states and 10009 transitions.
[2023-11-28 23:42:23,651 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 485.57142857142856) internal successors, (3399), 7 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:23,651 INFO  L276                IsEmpty]: Start isEmpty. Operand 6011 states and 10009 transitions.
[2023-11-28 23:42:23,726 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4014
[2023-11-28 23:42:23,726 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:23,729 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]
[2023-11-28 23:42:23,777 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 23:42:23,929 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:23,930 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:23,930 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:23,931 INFO  L85        PathProgramCache]: Analyzing trace with hash 6267502, now seen corresponding path program 1 times
[2023-11-28 23:42:23,932 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:23,932 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951785539]
[2023-11-28 23:42:23,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:23,933 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:24,285 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:24,285 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510378984]
[2023-11-28 23:42:24,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:24,287 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:24,287 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:24,288 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:24,292 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 23:42:28,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:28,150 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17375 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:42:28,214 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:28,495 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked.
[2023-11-28 23:42:28,495 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:28,496 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:28,496 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951785539]
[2023-11-28 23:42:28,496 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:28,496 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510378984]
[2023-11-28 23:42:28,496 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [510378984] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:28,496 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:28,498 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:42:28,498 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891932485]
[2023-11-28 23:42:28,498 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:28,504 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:42:28,504 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:28,506 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:42:28,507 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:42:28,508 INFO  L87              Difference]: Start difference. First operand 6011 states and 10009 transitions. Second operand  has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:28,919 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:28,919 INFO  L93              Difference]: Finished difference Result 15674 states and 26097 transitions.
[2023-11-28 23:42:28,920 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:28,921 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 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 4013
[2023-11-28 23:42:28,925 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:28,939 INFO  L225             Difference]: With dead ends: 15674
[2023-11-28 23:42:28,939 INFO  L226             Difference]: Without dead ends: 10836
[2023-11-28 23:42:28,946 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4022 GetRequests, 4010 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:42:28,947 INFO  L413           NwaCegarLoop]: 9985 mSDtfsCounter, 22819 mSDsluCounter, 38394 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22819 SdHoareTripleChecker+Valid, 48379 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:28,947 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22819 Valid, 48379 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:28,958 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10836 states.
[2023-11-28 23:42:29,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10836 to 6013.
[2023-11-28 23:42:29,043 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6013 states, 6012 states have (on average 1.6651696606786428) internal successors, (10011), 6012 states have internal predecessors, (10011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:29,055 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 10011 transitions.
[2023-11-28 23:42:29,056 INFO  L78                 Accepts]: Start accepts. Automaton has 6013 states and 10011 transitions. Word has length 4013
[2023-11-28 23:42:29,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:29,058 INFO  L495      AbstractCegarLoop]: Abstraction has 6013 states and 10011 transitions.
[2023-11-28 23:42:29,059 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 486.0) internal successors, (3402), 7 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:29,060 INFO  L276                IsEmpty]: Start isEmpty. Operand 6013 states and 10011 transitions.
[2023-11-28 23:42:29,134 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4015
[2023-11-28 23:42:29,135 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:29,137 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:42:29,187 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 23:42:29,337 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:29,338 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:29,338 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:29,339 INFO  L85        PathProgramCache]: Analyzing trace with hash 422041816, now seen corresponding path program 1 times
[2023-11-28 23:42:29,339 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:29,340 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101835819]
[2023-11-28 23:42:29,340 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:29,340 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:29,720 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:29,720 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605902325]
[2023-11-28 23:42:29,721 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:29,721 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:29,721 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:29,722 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:29,724 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 23:42:33,394 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:33,500 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17379 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:42:33,583 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:33,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked.
[2023-11-28 23:42:33,883 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:33,883 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:33,883 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101835819]
[2023-11-28 23:42:33,883 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:33,883 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605902325]
[2023-11-28 23:42:33,884 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [605902325] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:33,884 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:33,885 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:42:33,885 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014384131]
[2023-11-28 23:42:33,886 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:33,891 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:42:33,892 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:33,894 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:42:33,895 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:42:33,896 INFO  L87              Difference]: Start difference. First operand 6013 states and 10011 transitions. Second operand  has 7 states, 7 states have (on average 486.42857142857144) internal successors, (3405), 7 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:34,287 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:34,288 INFO  L93              Difference]: Finished difference Result 15680 states and 26103 transitions.
[2023-11-28 23:42:34,288 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:34,289 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 486.42857142857144) internal successors, (3405), 7 states have internal predecessors, (3405), 0 states have call successors, (0), 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 4014
[2023-11-28 23:42:34,293 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:34,307 INFO  L225             Difference]: With dead ends: 15680
[2023-11-28 23:42:34,307 INFO  L226             Difference]: Without dead ends: 10837
[2023-11-28 23:42:34,313 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4023 GetRequests, 4011 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:42:34,314 INFO  L413           NwaCegarLoop]: 9980 mSDtfsCounter, 22818 mSDsluCounter, 38379 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22818 SdHoareTripleChecker+Valid, 48359 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:34,315 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22818 Valid, 48359 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:34,326 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10837 states.
[2023-11-28 23:42:34,397 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 6015.
[2023-11-28 23:42:34,405 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6015 states, 6014 states have (on average 1.6649484536082475) internal successors, (10013), 6014 states have internal predecessors, (10013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:34,412 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 10013 transitions.
[2023-11-28 23:42:34,412 INFO  L78                 Accepts]: Start accepts. Automaton has 6015 states and 10013 transitions. Word has length 4014
[2023-11-28 23:42:34,415 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:34,415 INFO  L495      AbstractCegarLoop]: Abstraction has 6015 states and 10013 transitions.
[2023-11-28 23:42:34,416 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 486.42857142857144) internal successors, (3405), 7 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:34,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 6015 states and 10013 transitions.
[2023-11-28 23:42:34,496 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4016
[2023-11-28 23:42:34,496 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:34,498 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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[2023-11-28 23:42:34,549 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-28 23:42:34,699 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:34,699 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:34,699 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:34,701 INFO  L85        PathProgramCache]: Analyzing trace with hash -1501423418, now seen corresponding path program 1 times
[2023-11-28 23:42:34,701 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:34,701 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270908387]
[2023-11-28 23:42:34,701 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:34,701 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:35,036 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:35,036 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594279575]
[2023-11-28 23:42:35,037 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:35,037 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:35,037 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:35,038 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:35,040 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-28 23:42:39,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:39,105 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17382 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:42:39,210 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:39,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked.
[2023-11-28 23:42:39,512 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:39,512 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:39,512 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270908387]
[2023-11-28 23:42:39,512 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:39,512 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594279575]
[2023-11-28 23:42:39,513 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [594279575] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:39,513 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:39,514 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:42:39,514 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033963302]
[2023-11-28 23:42:39,515 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:39,518 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:42:39,519 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:39,521 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:42:39,522 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:42:39,523 INFO  L87              Difference]: Start difference. First operand 6015 states and 10013 transitions. Second operand  has 8 states, 8 states have (on average 426.0) internal successors, (3408), 8 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:39,955 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:39,956 INFO  L93              Difference]: Finished difference Result 15686 states and 26109 transitions.
[2023-11-28 23:42:39,956 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:39,957 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 426.0) internal successors, (3408), 8 states have internal predecessors, (3408), 0 states have call successors, (0), 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 4015
[2023-11-28 23:42:39,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:39,973 INFO  L225             Difference]: With dead ends: 15686
[2023-11-28 23:42:39,974 INFO  L226             Difference]: Without dead ends: 10838
[2023-11-28 23:42:39,980 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4024 GetRequests, 4011 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-28 23:42:39,981 INFO  L413           NwaCegarLoop]: 9975 mSDtfsCounter, 22817 mSDsluCounter, 48336 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22817 SdHoareTripleChecker+Valid, 58311 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:39,981 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22817 Valid, 58311 Invalid, 59 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:39,992 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10838 states.
[2023-11-28 23:42:40,067 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 6017.
[2023-11-28 23:42:40,074 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6017 states, 6016 states have (on average 1.6647273936170213) internal successors, (10015), 6016 states have internal predecessors, (10015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:40,081 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 10015 transitions.
[2023-11-28 23:42:40,081 INFO  L78                 Accepts]: Start accepts. Automaton has 6017 states and 10015 transitions. Word has length 4015
[2023-11-28 23:42:40,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:40,084 INFO  L495      AbstractCegarLoop]: Abstraction has 6017 states and 10015 transitions.
[2023-11-28 23:42:40,085 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 426.0) internal successors, (3408), 8 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:40,086 INFO  L276                IsEmpty]: Start isEmpty. Operand 6017 states and 10015 transitions.
[2023-11-28 23:42:40,164 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4017
[2023-11-28 23:42:40,165 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:40,167 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]
[2023-11-28 23:42:40,218 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-28 23:42:40,367 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:40,368 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:40,368 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:40,369 INFO  L85        PathProgramCache]: Analyzing trace with hash 2039882558, now seen corresponding path program 1 times
[2023-11-28 23:42:40,369 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:40,369 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234143051]
[2023-11-28 23:42:40,370 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:40,370 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:40,684 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:40,684 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710676635]
[2023-11-28 23:42:40,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:40,685 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:40,685 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:40,686 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:40,688 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-28 23:42:44,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:44,495 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17385 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:42:44,551 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:44,788 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked.
[2023-11-28 23:42:44,788 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:44,788 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:44,788 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234143051]
[2023-11-28 23:42:44,788 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:44,788 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710676635]
[2023-11-28 23:42:44,788 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [710676635] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:44,788 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:44,790 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:42:44,790 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501723713]
[2023-11-28 23:42:44,790 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:44,795 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:42:44,795 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:44,799 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:42:44,799 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:42:44,800 INFO  L87              Difference]: Start difference. First operand 6017 states and 10015 transitions. Second operand  has 7 states, 7 states have (on average 487.2857142857143) internal successors, (3411), 7 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:45,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:45,147 INFO  L93              Difference]: Finished difference Result 15692 states and 26115 transitions.
[2023-11-28 23:42:45,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:45,148 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 487.2857142857143) internal successors, (3411), 7 states have internal predecessors, (3411), 0 states have call successors, (0), 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 4016
[2023-11-28 23:42:45,153 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:45,174 INFO  L225             Difference]: With dead ends: 15692
[2023-11-28 23:42:45,174 INFO  L226             Difference]: Without dead ends: 10839
[2023-11-28 23:42:45,180 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4025 GetRequests, 4013 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:42:45,181 INFO  L413           NwaCegarLoop]: 9970 mSDtfsCounter, 22816 mSDsluCounter, 38349 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22816 SdHoareTripleChecker+Valid, 48319 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:45,181 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22816 Valid, 48319 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:45,193 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10839 states.
[2023-11-28 23:42:45,263 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 6019.
[2023-11-28 23:42:45,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6019 states, 6018 states have (on average 1.664506480558325) internal successors, (10017), 6018 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:45,277 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 10017 transitions.
[2023-11-28 23:42:45,278 INFO  L78                 Accepts]: Start accepts. Automaton has 6019 states and 10017 transitions. Word has length 4016
[2023-11-28 23:42:45,280 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:45,281 INFO  L495      AbstractCegarLoop]: Abstraction has 6019 states and 10017 transitions.
[2023-11-28 23:42:45,281 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 487.2857142857143) internal successors, (3411), 7 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:45,282 INFO  L276                IsEmpty]: Start isEmpty. Operand 6019 states and 10017 transitions.
[2023-11-28 23:42:45,486 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4018
[2023-11-28 23:42:45,486 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:45,489 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:42:45,553 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-28 23:42:45,695 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:45,696 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:45,697 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:45,698 INFO  L85        PathProgramCache]: Analyzing trace with hash -1661660832, now seen corresponding path program 1 times
[2023-11-28 23:42:45,698 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:45,698 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364912320]
[2023-11-28 23:42:45,699 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:45,699 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:46,029 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:46,029 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470020305]
[2023-11-28 23:42:46,031 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:46,031 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:46,031 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:46,032 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:46,034 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-28 23:42:49,881 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:50,003 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17388 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:42:50,058 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:50,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked.
[2023-11-28 23:42:50,311 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:50,311 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:50,311 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364912320]
[2023-11-28 23:42:50,311 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:50,311 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470020305]
[2023-11-28 23:42:50,311 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470020305] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:50,311 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:50,313 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:42:50,313 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402867313]
[2023-11-28 23:42:50,313 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:50,318 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:42:50,318 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:50,322 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:42:50,322 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:42:50,323 INFO  L87              Difference]: Start difference. First operand 6019 states and 10017 transitions. Second operand  has 7 states, 7 states have (on average 487.7142857142857) internal successors, (3414), 7 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:50,666 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:50,666 INFO  L93              Difference]: Finished difference Result 15698 states and 26121 transitions.
[2023-11-28 23:42:50,666 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:50,667 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 487.7142857142857) internal successors, (3414), 7 states have internal predecessors, (3414), 0 states have call successors, (0), 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 4017
[2023-11-28 23:42:50,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:50,679 INFO  L225             Difference]: With dead ends: 15698
[2023-11-28 23:42:50,679 INFO  L226             Difference]: Without dead ends: 10840
[2023-11-28 23:42:50,685 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4026 GetRequests, 4014 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:42:50,686 INFO  L413           NwaCegarLoop]: 9965 mSDtfsCounter, 22815 mSDsluCounter, 38334 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22815 SdHoareTripleChecker+Valid, 48299 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:50,686 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22815 Valid, 48299 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:50,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10840 states.
[2023-11-28 23:42:50,787 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10840 to 6021.
[2023-11-28 23:42:50,794 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6021 states, 6020 states have (on average 1.6642857142857144) internal successors, (10019), 6020 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:50,803 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6021 states to 6021 states and 10019 transitions.
[2023-11-28 23:42:50,803 INFO  L78                 Accepts]: Start accepts. Automaton has 6021 states and 10019 transitions. Word has length 4017
[2023-11-28 23:42:50,807 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:50,807 INFO  L495      AbstractCegarLoop]: Abstraction has 6021 states and 10019 transitions.
[2023-11-28 23:42:50,808 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 487.7142857142857) internal successors, (3414), 7 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:50,808 INFO  L276                IsEmpty]: Start isEmpty. Operand 6021 states and 10019 transitions.
[2023-11-28 23:42:50,915 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4019
[2023-11-28 23:42:50,915 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:50,918 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:42:50,977 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-28 23:42:51,118 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:51,118 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:51,119 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:51,120 INFO  L85        PathProgramCache]: Analyzing trace with hash 782085730, now seen corresponding path program 1 times
[2023-11-28 23:42:51,120 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:51,120 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418407268]
[2023-11-28 23:42:51,121 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:51,121 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:51,446 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:51,446 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852497333]
[2023-11-28 23:42:51,448 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:51,448 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:51,448 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:51,449 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:51,450 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-28 23:42:55,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:42:55,298 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17392 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:42:55,355 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:42:55,611 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked.
[2023-11-28 23:42:55,611 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:42:55,611 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:42:55,611 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418407268]
[2023-11-28 23:42:55,611 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:42:55,611 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852497333]
[2023-11-28 23:42:55,612 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [852497333] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:42:55,612 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:42:55,613 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:42:55,613 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934491904]
[2023-11-28 23:42:55,613 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:42:55,616 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:42:55,616 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:42:55,619 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:42:55,619 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:42:55,620 INFO  L87              Difference]: Start difference. First operand 6021 states and 10019 transitions. Second operand  has 7 states, 7 states have (on average 488.14285714285717) internal successors, (3417), 7 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:56,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:42:56,053 INFO  L93              Difference]: Finished difference Result 15704 states and 26127 transitions.
[2023-11-28 23:42:56,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:42:56,054 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 488.14285714285717) internal successors, (3417), 7 states have internal predecessors, (3417), 0 states have call successors, (0), 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 4018
[2023-11-28 23:42:56,058 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:42:56,067 INFO  L225             Difference]: With dead ends: 15704
[2023-11-28 23:42:56,067 INFO  L226             Difference]: Without dead ends: 10841
[2023-11-28 23:42:56,073 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4027 GetRequests, 4015 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:42:56,074 INFO  L413           NwaCegarLoop]: 9960 mSDtfsCounter, 22814 mSDsluCounter, 38319 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22814 SdHoareTripleChecker+Valid, 48279 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:42:56,074 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22814 Valid, 48279 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:42:56,085 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10841 states.
[2023-11-28 23:42:56,177 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10841 to 6023.
[2023-11-28 23:42:56,184 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6023 states, 6022 states have (on average 1.6640650946529392) internal successors, (10021), 6022 states have internal predecessors, (10021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:56,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 10021 transitions.
[2023-11-28 23:42:56,199 INFO  L78                 Accepts]: Start accepts. Automaton has 6023 states and 10021 transitions. Word has length 4018
[2023-11-28 23:42:56,203 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:42:56,203 INFO  L495      AbstractCegarLoop]: Abstraction has 6023 states and 10021 transitions.
[2023-11-28 23:42:56,204 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 488.14285714285717) internal successors, (3417), 7 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:42:56,205 INFO  L276                IsEmpty]: Start isEmpty. Operand 6023 states and 10021 transitions.
[2023-11-28 23:42:56,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4020
[2023-11-28 23:42:56,434 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:42:56,437 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:42:56,491 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-28 23:42:56,639 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-28 23:42:56,640 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:42:56,640 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:42:56,642 INFO  L85        PathProgramCache]: Analyzing trace with hash 1782019768, now seen corresponding path program 1 times
[2023-11-28 23:42:56,642 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:42:56,642 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993736020]
[2023-11-28 23:42:56,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:56,643 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:42:57,069 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:42:57,070 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033690321]
[2023-11-28 23:42:57,070 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:42:57,071 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:42:57,071 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:42:57,072 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:42:57,074 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-28 23:43:00,845 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:00,954 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17395 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:01,033 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:01,253 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked.
[2023-11-28 23:43:01,254 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:01,254 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:01,254 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993736020]
[2023-11-28 23:43:01,254 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:01,254 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033690321]
[2023-11-28 23:43:01,254 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033690321] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:01,254 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:01,255 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:01,255 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872663902]
[2023-11-28 23:43:01,255 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:01,260 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:01,260 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:01,263 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:01,264 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:01,265 INFO  L87              Difference]: Start difference. First operand 6023 states and 10021 transitions. Second operand  has 7 states, 7 states have (on average 488.57142857142856) internal successors, (3420), 7 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:01,604 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:01,604 INFO  L93              Difference]: Finished difference Result 15710 states and 26133 transitions.
[2023-11-28 23:43:01,604 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:01,605 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 488.57142857142856) internal successors, (3420), 7 states have internal predecessors, (3420), 0 states have call successors, (0), 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 4019
[2023-11-28 23:43:01,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:01,618 INFO  L225             Difference]: With dead ends: 15710
[2023-11-28 23:43:01,618 INFO  L226             Difference]: Without dead ends: 10842
[2023-11-28 23:43:01,625 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4028 GetRequests, 4016 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:01,626 INFO  L413           NwaCegarLoop]: 9955 mSDtfsCounter, 22813 mSDsluCounter, 38304 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22813 SdHoareTripleChecker+Valid, 48259 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:01,626 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22813 Valid, 48259 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:01,635 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10842 states.
[2023-11-28 23:43:01,704 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6025.
[2023-11-28 23:43:01,710 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6025 states, 6024 states have (on average 1.6638446215139442) internal successors, (10023), 6024 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:01,717 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 10023 transitions.
[2023-11-28 23:43:01,717 INFO  L78                 Accepts]: Start accepts. Automaton has 6025 states and 10023 transitions. Word has length 4019
[2023-11-28 23:43:01,719 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:01,719 INFO  L495      AbstractCegarLoop]: Abstraction has 6025 states and 10023 transitions.
[2023-11-28 23:43:01,720 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 488.57142857142856) internal successors, (3420), 7 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:01,720 INFO  L276                IsEmpty]: Start isEmpty. Operand 6025 states and 10023 transitions.
[2023-11-28 23:43:01,799 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4021
[2023-11-28 23:43:01,799 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:01,803 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:43:01,854 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2023-11-28 23:43:02,007 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-28 23:43:02,008 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:02,008 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:02,011 INFO  L85        PathProgramCache]: Analyzing trace with hash 1558265032, now seen corresponding path program 1 times
[2023-11-28 23:43:02,011 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:02,011 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103478884]
[2023-11-28 23:43:02,011 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:02,012 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:02,317 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:02,317 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802871060]
[2023-11-28 23:43:02,318 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:02,318 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:02,318 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:02,319 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:02,320 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-28 23:43:06,078 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:06,182 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17398 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:43:06,238 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:06,480 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked.
[2023-11-28 23:43:06,480 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:06,480 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:06,480 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103478884]
[2023-11-28 23:43:06,480 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:06,480 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802871060]
[2023-11-28 23:43:06,480 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802871060] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:06,480 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:06,481 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:43:06,481 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788643044]
[2023-11-28 23:43:06,481 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:06,484 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:43:06,484 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:06,487 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:43:06,487 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:43:06,488 INFO  L87              Difference]: Start difference. First operand 6025 states and 10023 transitions. Second operand  has 8 states, 8 states have (on average 427.875) internal successors, (3423), 8 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:06,873 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:06,873 INFO  L93              Difference]: Finished difference Result 15716 states and 26139 transitions.
[2023-11-28 23:43:06,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:06,874 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 427.875) internal successors, (3423), 8 states have internal predecessors, (3423), 0 states have call successors, (0), 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 4020
[2023-11-28 23:43:06,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:06,885 INFO  L225             Difference]: With dead ends: 15716
[2023-11-28 23:43:06,885 INFO  L226             Difference]: Without dead ends: 10843
[2023-11-28 23:43:06,891 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4029 GetRequests, 4016 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2023-11-28 23:43:06,892 INFO  L413           NwaCegarLoop]: 9950 mSDtfsCounter, 22812 mSDsluCounter, 48236 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22812 SdHoareTripleChecker+Valid, 58186 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:06,892 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22812 Valid, 58186 Invalid, 59 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:06,901 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10843 states.
[2023-11-28 23:43:06,963 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10843 to 6027.
[2023-11-28 23:43:06,969 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6027 states, 6026 states have (on average 1.6636242947228677) internal successors, (10025), 6026 states have internal predecessors, (10025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:06,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 10025 transitions.
[2023-11-28 23:43:06,976 INFO  L78                 Accepts]: Start accepts. Automaton has 6027 states and 10025 transitions. Word has length 4020
[2023-11-28 23:43:06,978 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:06,978 INFO  L495      AbstractCegarLoop]: Abstraction has 6027 states and 10025 transitions.
[2023-11-28 23:43:06,979 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 427.875) internal successors, (3423), 8 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:06,979 INFO  L276                IsEmpty]: Start isEmpty. Operand 6027 states and 10025 transitions.
[2023-11-28 23:43:07,049 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4022
[2023-11-28 23:43:07,049 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:07,051 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:43:07,098 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-28 23:43:07,251 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-28 23:43:07,252 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:07,252 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:07,253 INFO  L85        PathProgramCache]: Analyzing trace with hash -335656110, now seen corresponding path program 1 times
[2023-11-28 23:43:07,254 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:07,254 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400833759]
[2023-11-28 23:43:07,254 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:07,254 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:07,556 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:07,556 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607028028]
[2023-11-28 23:43:07,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:07,557 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:07,557 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:07,558 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:07,559 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-28 23:43:11,333 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:11,439 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17401 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:11,495 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:11,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked.
[2023-11-28 23:43:11,732 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:11,732 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:11,732 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400833759]
[2023-11-28 23:43:11,733 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:11,733 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607028028]
[2023-11-28 23:43:11,733 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607028028] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:11,733 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:11,734 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:11,734 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019378150]
[2023-11-28 23:43:11,734 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:11,737 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:11,737 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:11,739 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:11,739 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:11,740 INFO  L87              Difference]: Start difference. First operand 6027 states and 10025 transitions. Second operand  has 7 states, 7 states have (on average 489.7142857142857) internal successors, (3428), 7 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:12,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:12,068 INFO  L93              Difference]: Finished difference Result 15725 states and 26150 transitions.
[2023-11-28 23:43:12,068 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:12,069 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 489.7142857142857) internal successors, (3428), 7 states have internal predecessors, (3428), 0 states have call successors, (0), 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 4021
[2023-11-28 23:43:12,072 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:12,079 INFO  L225             Difference]: With dead ends: 15725
[2023-11-28 23:43:12,079 INFO  L226             Difference]: Without dead ends: 10847
[2023-11-28 23:43:12,083 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4030 GetRequests, 4018 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:12,084 INFO  L413           NwaCegarLoop]: 9940 mSDtfsCounter, 22814 mSDsluCounter, 38259 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22814 SdHoareTripleChecker+Valid, 48199 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:12,084 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22814 Valid, 48199 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:12,093 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10847 states.
[2023-11-28 23:43:12,171 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10847 to 6032.
[2023-11-28 23:43:12,177 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6032 states, 6031 states have (on average 1.663405737025369) internal successors, (10032), 6031 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:12,187 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 10032 transitions.
[2023-11-28 23:43:12,187 INFO  L78                 Accepts]: Start accepts. Automaton has 6032 states and 10032 transitions. Word has length 4021
[2023-11-28 23:43:12,190 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:12,190 INFO  L495      AbstractCegarLoop]: Abstraction has 6032 states and 10032 transitions.
[2023-11-28 23:43:12,191 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 489.7142857142857) internal successors, (3428), 7 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:12,192 INFO  L276                IsEmpty]: Start isEmpty. Operand 6032 states and 10032 transitions.
[2023-11-28 23:43:12,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4023
[2023-11-28 23:43:12,306 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:12,309 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:43:12,365 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-28 23:43:12,515 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-28 23:43:12,516 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:12,516 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:12,517 INFO  L85        PathProgramCache]: Analyzing trace with hash 1675705044, now seen corresponding path program 1 times
[2023-11-28 23:43:12,517 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:12,517 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607249646]
[2023-11-28 23:43:12,518 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:12,518 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:12,831 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:12,832 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651351988]
[2023-11-28 23:43:12,833 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:12,833 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:12,834 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:12,834 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:12,835 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-28 23:43:16,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:16,605 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17404 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:16,664 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:16,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked.
[2023-11-28 23:43:16,895 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:16,895 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:16,895 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607249646]
[2023-11-28 23:43:16,896 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:16,896 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651351988]
[2023-11-28 23:43:16,896 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651351988] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:16,896 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:16,897 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:16,898 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725409974]
[2023-11-28 23:43:16,898 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:16,901 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:16,901 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:16,904 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:16,904 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:16,905 INFO  L87              Difference]: Start difference. First operand 6032 states and 10032 transitions. Second operand  has 7 states, 7 states have (on average 490.42857142857144) internal successors, (3433), 7 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:17,243 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:17,243 INFO  L93              Difference]: Finished difference Result 15740 states and 26171 transitions.
[2023-11-28 23:43:17,243 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:17,244 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 490.42857142857144) internal successors, (3433), 7 states have internal predecessors, (3433), 0 states have call successors, (0), 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 4022
[2023-11-28 23:43:17,247 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:17,255 INFO  L225             Difference]: With dead ends: 15740
[2023-11-28 23:43:17,255 INFO  L226             Difference]: Without dead ends: 10851
[2023-11-28 23:43:17,259 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4031 GetRequests, 4019 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:17,260 INFO  L413           NwaCegarLoop]: 9930 mSDtfsCounter, 22818 mSDsluCounter, 38229 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22818 SdHoareTripleChecker+Valid, 48159 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:17,260 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22818 Valid, 48159 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:17,269 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10851 states.
[2023-11-28 23:43:17,324 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 6037.
[2023-11-28 23:43:17,329 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6037 states, 6036 states have (on average 1.6631875414181576) internal successors, (10039), 6036 states have internal predecessors, (10039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:17,336 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 10039 transitions.
[2023-11-28 23:43:17,336 INFO  L78                 Accepts]: Start accepts. Automaton has 6037 states and 10039 transitions. Word has length 4022
[2023-11-28 23:43:17,339 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:17,339 INFO  L495      AbstractCegarLoop]: Abstraction has 6037 states and 10039 transitions.
[2023-11-28 23:43:17,340 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 490.42857142857144) internal successors, (3433), 7 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:17,340 INFO  L276                IsEmpty]: Start isEmpty. Operand 6037 states and 10039 transitions.
[2023-11-28 23:43:17,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4024
[2023-11-28 23:43:17,413 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:17,415 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:43:17,470 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-28 23:43:17,616 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-28 23:43:17,616 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:17,616 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:17,618 INFO  L85        PathProgramCache]: Analyzing trace with hash -1592381882, now seen corresponding path program 1 times
[2023-11-28 23:43:17,618 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:17,618 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027812452]
[2023-11-28 23:43:17,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:17,618 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:17,972 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:17,972 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794590071]
[2023-11-28 23:43:17,973 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:17,973 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:17,973 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:17,974 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:17,975 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-28 23:43:21,686 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:21,793 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17407 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:21,965 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:22,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked.
[2023-11-28 23:43:22,184 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:22,184 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:22,184 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027812452]
[2023-11-28 23:43:22,184 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:22,184 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794590071]
[2023-11-28 23:43:22,185 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [794590071] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:22,185 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:22,186 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:22,186 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112496898]
[2023-11-28 23:43:22,186 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:22,189 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:22,189 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:22,191 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:22,191 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:22,192 INFO  L87              Difference]: Start difference. First operand 6037 states and 10039 transitions. Second operand  has 7 states, 7 states have (on average 491.14285714285717) internal successors, (3438), 7 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:22,534 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:22,534 INFO  L93              Difference]: Finished difference Result 15755 states and 26192 transitions.
[2023-11-28 23:43:22,534 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:22,535 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 491.14285714285717) internal successors, (3438), 7 states have internal predecessors, (3438), 0 states have call successors, (0), 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 4023
[2023-11-28 23:43:22,539 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:22,547 INFO  L225             Difference]: With dead ends: 15755
[2023-11-28 23:43:22,547 INFO  L226             Difference]: Without dead ends: 10855
[2023-11-28 23:43:22,551 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4032 GetRequests, 4020 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:22,552 INFO  L413           NwaCegarLoop]: 9920 mSDtfsCounter, 22822 mSDsluCounter, 38199 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22822 SdHoareTripleChecker+Valid, 48119 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:22,552 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22822 Valid, 48119 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:22,561 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10855 states.
[2023-11-28 23:43:22,620 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 6042.
[2023-11-28 23:43:22,625 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6042 states, 6041 states have (on average 1.6629697070021519) internal successors, (10046), 6041 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:22,632 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 10046 transitions.
[2023-11-28 23:43:22,633 INFO  L78                 Accepts]: Start accepts. Automaton has 6042 states and 10046 transitions. Word has length 4023
[2023-11-28 23:43:22,635 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:22,635 INFO  L495      AbstractCegarLoop]: Abstraction has 6042 states and 10046 transitions.
[2023-11-28 23:43:22,636 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 491.14285714285717) internal successors, (3438), 7 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:22,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 6042 states and 10046 transitions.
[2023-11-28 23:43:22,711 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4025
[2023-11-28 23:43:22,711 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:22,713 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:43:22,762 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-28 23:43:22,913 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-28 23:43:22,913 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:22,914 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:22,915 INFO  L85        PathProgramCache]: Analyzing trace with hash 89474784, now seen corresponding path program 1 times
[2023-11-28 23:43:22,915 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:22,915 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477698212]
[2023-11-28 23:43:22,915 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:22,916 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:23,253 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:23,253 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490761851]
[2023-11-28 23:43:23,254 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:23,254 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:23,254 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:23,255 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:23,256 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-28 23:43:27,057 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:27,166 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17410 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:27,223 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:27,448 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked.
[2023-11-28 23:43:27,448 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:27,448 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:27,448 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477698212]
[2023-11-28 23:43:27,448 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:27,448 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490761851]
[2023-11-28 23:43:27,448 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490761851] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:27,448 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:27,450 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:27,450 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071275902]
[2023-11-28 23:43:27,450 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:27,453 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:27,453 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:27,455 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:27,455 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:27,456 INFO  L87              Difference]: Start difference. First operand 6042 states and 10046 transitions. Second operand  has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:27,779 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:27,780 INFO  L93              Difference]: Finished difference Result 15770 states and 26213 transitions.
[2023-11-28 23:43:27,780 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:27,781 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 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 4024
[2023-11-28 23:43:27,784 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:27,792 INFO  L225             Difference]: With dead ends: 15770
[2023-11-28 23:43:27,792 INFO  L226             Difference]: Without dead ends: 10859
[2023-11-28 23:43:27,796 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4033 GetRequests, 4021 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:27,797 INFO  L413           NwaCegarLoop]: 9910 mSDtfsCounter, 22826 mSDsluCounter, 38169 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22826 SdHoareTripleChecker+Valid, 48079 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:27,797 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22826 Valid, 48079 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:27,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10859 states.
[2023-11-28 23:43:27,863 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 6047.
[2023-11-28 23:43:27,868 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6047 states, 6046 states have (on average 1.6627522328812439) internal successors, (10053), 6046 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:27,875 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6047 states to 6047 states and 10053 transitions.
[2023-11-28 23:43:27,875 INFO  L78                 Accepts]: Start accepts. Automaton has 6047 states and 10053 transitions. Word has length 4024
[2023-11-28 23:43:27,877 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:27,877 INFO  L495      AbstractCegarLoop]: Abstraction has 6047 states and 10053 transitions.
[2023-11-28 23:43:27,878 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 491.85714285714283) internal successors, (3443), 7 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:27,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 6047 states and 10053 transitions.
[2023-11-28 23:43:27,955 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4026
[2023-11-28 23:43:27,955 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:27,957 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:43:28,006 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-28 23:43:28,158 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-28 23:43:28,158 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:28,158 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:28,160 INFO  L85        PathProgramCache]: Analyzing trace with hash -264608966, now seen corresponding path program 1 times
[2023-11-28 23:43:28,160 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:28,160 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360636157]
[2023-11-28 23:43:28,161 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:28,161 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:28,490 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:28,491 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693003039]
[2023-11-28 23:43:28,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:28,492 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:28,492 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:28,493 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:28,495 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-28 23:43:32,141 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:32,249 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17413 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:32,307 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:32,551 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked.
[2023-11-28 23:43:32,551 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:32,551 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:32,551 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360636157]
[2023-11-28 23:43:32,551 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:32,552 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693003039]
[2023-11-28 23:43:32,552 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693003039] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:32,552 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:32,553 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:32,553 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929208290]
[2023-11-28 23:43:32,553 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:32,557 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:32,557 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:32,559 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:32,559 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:32,560 INFO  L87              Difference]: Start difference. First operand 6047 states and 10053 transitions. Second operand  has 7 states, 7 states have (on average 492.57142857142856) internal successors, (3448), 7 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:32,978 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:32,979 INFO  L93              Difference]: Finished difference Result 15785 states and 26234 transitions.
[2023-11-28 23:43:32,979 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:32,980 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 492.57142857142856) internal successors, (3448), 7 states have internal predecessors, (3448), 0 states have call successors, (0), 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 4025
[2023-11-28 23:43:32,983 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:32,989 INFO  L225             Difference]: With dead ends: 15785
[2023-11-28 23:43:32,989 INFO  L226             Difference]: Without dead ends: 10863
[2023-11-28 23:43:32,993 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4034 GetRequests, 4022 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:32,993 INFO  L413           NwaCegarLoop]: 9900 mSDtfsCounter, 22830 mSDsluCounter, 38139 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22830 SdHoareTripleChecker+Valid, 48039 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:32,994 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22830 Valid, 48039 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:33,002 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10863 states.
[2023-11-28 23:43:33,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 6052.
[2023-11-28 23:43:33,070 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6052 states, 6051 states have (on average 1.6625351181622872) internal successors, (10060), 6051 states have internal predecessors, (10060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:33,081 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6052 states to 6052 states and 10060 transitions.
[2023-11-28 23:43:33,081 INFO  L78                 Accepts]: Start accepts. Automaton has 6052 states and 10060 transitions. Word has length 4025
[2023-11-28 23:43:33,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:33,084 INFO  L495      AbstractCegarLoop]: Abstraction has 6052 states and 10060 transitions.
[2023-11-28 23:43:33,085 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 492.57142857142856) internal successors, (3448), 7 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:33,085 INFO  L276                IsEmpty]: Start isEmpty. Operand 6052 states and 10060 transitions.
[2023-11-28 23:43:33,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4027
[2023-11-28 23:43:33,157 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:33,158 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:43:33,205 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-28 23:43:33,358 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-28 23:43:33,359 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:33,359 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:33,360 INFO  L85        PathProgramCache]: Analyzing trace with hash 2121048300, now seen corresponding path program 1 times
[2023-11-28 23:43:33,360 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:33,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285554026]
[2023-11-28 23:43:33,362 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:33,362 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:33,662 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:33,662 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271902339]
[2023-11-28 23:43:33,663 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:33,663 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:33,663 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:33,664 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:33,665 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-28 23:43:37,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:37,466 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17416 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:37,518 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:37,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked.
[2023-11-28 23:43:37,743 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:37,743 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:37,743 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285554026]
[2023-11-28 23:43:37,744 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:37,744 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271902339]
[2023-11-28 23:43:37,744 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271902339] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:37,744 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:37,745 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:37,745 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569456776]
[2023-11-28 23:43:37,745 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:37,748 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:37,748 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:37,752 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:37,752 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:37,753 INFO  L87              Difference]: Start difference. First operand 6052 states and 10060 transitions. Second operand  has 7 states, 7 states have (on average 493.2857142857143) internal successors, (3453), 7 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:38,089 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:38,089 INFO  L93              Difference]: Finished difference Result 15800 states and 26255 transitions.
[2023-11-28 23:43:38,089 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:38,090 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 493.2857142857143) internal successors, (3453), 7 states have internal predecessors, (3453), 0 states have call successors, (0), 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 4026
[2023-11-28 23:43:38,093 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:38,100 INFO  L225             Difference]: With dead ends: 15800
[2023-11-28 23:43:38,100 INFO  L226             Difference]: Without dead ends: 10867
[2023-11-28 23:43:38,104 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4035 GetRequests, 4023 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:38,105 INFO  L413           NwaCegarLoop]: 9890 mSDtfsCounter, 22834 mSDsluCounter, 38109 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22834 SdHoareTripleChecker+Valid, 47999 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:38,105 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22834 Valid, 47999 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:38,114 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10867 states.
[2023-11-28 23:43:38,178 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 6057.
[2023-11-28 23:43:38,184 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6057 states, 6056 states have (on average 1.6623183619550859) internal successors, (10067), 6056 states have internal predecessors, (10067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:38,194 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 10067 transitions.
[2023-11-28 23:43:38,194 INFO  L78                 Accepts]: Start accepts. Automaton has 6057 states and 10067 transitions. Word has length 4026
[2023-11-28 23:43:38,197 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:38,197 INFO  L495      AbstractCegarLoop]: Abstraction has 6057 states and 10067 transitions.
[2023-11-28 23:43:38,198 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 493.2857142857143) internal successors, (3453), 7 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:38,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 6057 states and 10067 transitions.
[2023-11-28 23:43:38,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4028
[2023-11-28 23:43:38,289 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:38,290 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:43:38,338 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-28 23:43:38,490 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:38,491 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:38,491 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:38,492 INFO  L85        PathProgramCache]: Analyzing trace with hash 1281075758, now seen corresponding path program 1 times
[2023-11-28 23:43:38,492 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:38,492 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998137134]
[2023-11-28 23:43:38,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:38,492 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:38,794 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:38,795 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517125352]
[2023-11-28 23:43:38,795 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:38,796 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:38,796 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:38,796 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:38,797 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-28 23:43:42,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:42,565 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17419 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:42,612 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:42,836 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked.
[2023-11-28 23:43:42,836 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:42,836 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:42,836 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998137134]
[2023-11-28 23:43:42,836 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:42,836 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517125352]
[2023-11-28 23:43:42,836 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [517125352] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:42,836 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:42,838 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:42,838 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428983505]
[2023-11-28 23:43:42,838 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:42,841 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:42,841 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:42,845 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:42,845 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:42,846 INFO  L87              Difference]: Start difference. First operand 6057 states and 10067 transitions. Second operand  has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:43,182 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:43,182 INFO  L93              Difference]: Finished difference Result 15815 states and 26276 transitions.
[2023-11-28 23:43:43,182 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:43,183 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 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 4027
[2023-11-28 23:43:43,187 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:43,195 INFO  L225             Difference]: With dead ends: 15815
[2023-11-28 23:43:43,195 INFO  L226             Difference]: Without dead ends: 10871
[2023-11-28 23:43:43,200 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4036 GetRequests, 4024 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:43,200 INFO  L413           NwaCegarLoop]: 9880 mSDtfsCounter, 22838 mSDsluCounter, 38079 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22838 SdHoareTripleChecker+Valid, 47959 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:43,201 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22838 Valid, 47959 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:43,210 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10871 states.
[2023-11-28 23:43:43,286 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 6062.
[2023-11-28 23:43:43,291 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6062 states, 6061 states have (on average 1.6621019633723808) internal successors, (10074), 6061 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:43,298 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 10074 transitions.
[2023-11-28 23:43:43,298 INFO  L78                 Accepts]: Start accepts. Automaton has 6062 states and 10074 transitions. Word has length 4027
[2023-11-28 23:43:43,300 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:43,300 INFO  L495      AbstractCegarLoop]: Abstraction has 6062 states and 10074 transitions.
[2023-11-28 23:43:43,301 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:43,301 INFO  L276                IsEmpty]: Start isEmpty. Operand 6062 states and 10074 transitions.
[2023-11-28 23:43:43,459 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4029
[2023-11-28 23:43:43,459 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:43,460 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:43:43,509 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-28 23:43:43,660 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:43,661 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:43,662 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:43,662 INFO  L85        PathProgramCache]: Analyzing trace with hash 1393985784, now seen corresponding path program 1 times
[2023-11-28 23:43:43,662 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:43,662 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951139094]
[2023-11-28 23:43:43,663 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:43,663 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:44,067 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:44,068 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595611990]
[2023-11-28 23:43:44,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:44,068 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:44,069 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:44,069 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:44,070 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-28 23:43:47,800 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:47,909 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17422 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:47,975 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:48,199 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked.
[2023-11-28 23:43:48,199 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:48,199 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:48,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951139094]
[2023-11-28 23:43:48,199 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:48,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595611990]
[2023-11-28 23:43:48,199 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595611990] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:48,200 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:48,201 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:48,201 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544196194]
[2023-11-28 23:43:48,201 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:48,204 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:48,204 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:48,207 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:48,207 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:48,208 INFO  L87              Difference]: Start difference. First operand 6062 states and 10074 transitions. Second operand  has 7 states, 7 states have (on average 494.7142857142857) internal successors, (3463), 7 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:48,555 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:48,555 INFO  L93              Difference]: Finished difference Result 15830 states and 26297 transitions.
[2023-11-28 23:43:48,556 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:48,556 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 494.7142857142857) internal successors, (3463), 7 states have internal predecessors, (3463), 0 states have call successors, (0), 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 4028
[2023-11-28 23:43:48,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:48,567 INFO  L225             Difference]: With dead ends: 15830
[2023-11-28 23:43:48,567 INFO  L226             Difference]: Without dead ends: 10875
[2023-11-28 23:43:48,572 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4037 GetRequests, 4025 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:48,572 INFO  L413           NwaCegarLoop]: 9870 mSDtfsCounter, 22842 mSDsluCounter, 38049 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22842 SdHoareTripleChecker+Valid, 47919 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:48,573 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22842 Valid, 47919 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:48,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10875 states.
[2023-11-28 23:43:48,639 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10875 to 6067.
[2023-11-28 23:43:48,644 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6067 states, 6066 states have (on average 1.6618859215298385) internal successors, (10081), 6066 states have internal predecessors, (10081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:48,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 10081 transitions.
[2023-11-28 23:43:48,651 INFO  L78                 Accepts]: Start accepts. Automaton has 6067 states and 10081 transitions. Word has length 4028
[2023-11-28 23:43:48,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:48,654 INFO  L495      AbstractCegarLoop]: Abstraction has 6067 states and 10081 transitions.
[2023-11-28 23:43:48,654 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 494.7142857142857) internal successors, (3463), 7 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:48,654 INFO  L276                IsEmpty]: Start isEmpty. Operand 6067 states and 10081 transitions.
[2023-11-28 23:43:48,729 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4030
[2023-11-28 23:43:48,729 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:48,730 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:43:48,777 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-28 23:43:48,930 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-28 23:43:48,930 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:48,931 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:48,932 INFO  L85        PathProgramCache]: Analyzing trace with hash 1403700002, now seen corresponding path program 1 times
[2023-11-28 23:43:48,932 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:48,932 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160464023]
[2023-11-28 23:43:48,932 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:48,932 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:49,247 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:49,247 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222872938]
[2023-11-28 23:43:49,248 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:49,248 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:49,248 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:49,249 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:49,250 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-28 23:43:52,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:53,002 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17425 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:53,050 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:53,270 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked.
[2023-11-28 23:43:53,271 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:53,271 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:53,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160464023]
[2023-11-28 23:43:53,271 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:53,271 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222872938]
[2023-11-28 23:43:53,271 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [222872938] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:53,271 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:53,272 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:53,272 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083794757]
[2023-11-28 23:43:53,272 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:53,274 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:53,274 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:53,276 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:53,276 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:53,277 INFO  L87              Difference]: Start difference. First operand 6067 states and 10081 transitions. Second operand  has 7 states, 7 states have (on average 495.42857142857144) internal successors, (3468), 7 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:53,622 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:53,622 INFO  L93              Difference]: Finished difference Result 15845 states and 26318 transitions.
[2023-11-28 23:43:53,622 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:53,624 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 495.42857142857144) internal successors, (3468), 7 states have internal predecessors, (3468), 0 states have call successors, (0), 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 4029
[2023-11-28 23:43:53,627 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:53,635 INFO  L225             Difference]: With dead ends: 15845
[2023-11-28 23:43:53,635 INFO  L226             Difference]: Without dead ends: 10879
[2023-11-28 23:43:53,639 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4038 GetRequests, 4026 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:53,640 INFO  L413           NwaCegarLoop]: 9860 mSDtfsCounter, 22846 mSDsluCounter, 38019 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22846 SdHoareTripleChecker+Valid, 47879 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:53,640 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22846 Valid, 47879 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:53,649 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10879 states.
[2023-11-28 23:43:53,706 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10879 to 6072.
[2023-11-28 23:43:53,712 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6072 states, 6071 states have (on average 1.6616702355460387) internal successors, (10088), 6071 states have internal predecessors, (10088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:53,719 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 10088 transitions.
[2023-11-28 23:43:53,719 INFO  L78                 Accepts]: Start accepts. Automaton has 6072 states and 10088 transitions. Word has length 4029
[2023-11-28 23:43:53,721 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:53,721 INFO  L495      AbstractCegarLoop]: Abstraction has 6072 states and 10088 transitions.
[2023-11-28 23:43:53,722 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 495.42857142857144) internal successors, (3468), 7 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:53,722 INFO  L276                IsEmpty]: Start isEmpty. Operand 6072 states and 10088 transitions.
[2023-11-28 23:43:53,794 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4031
[2023-11-28 23:43:53,794 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:53,795 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:43:53,841 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0
[2023-11-28 23:43:53,995 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:53,996 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:53,996 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:53,997 INFO  L85        PathProgramCache]: Analyzing trace with hash -368951548, now seen corresponding path program 1 times
[2023-11-28 23:43:53,997 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:53,998 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217001178]
[2023-11-28 23:43:53,998 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:53,998 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:54,375 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:54,376 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328601600]
[2023-11-28 23:43:54,376 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:54,377 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:54,377 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:54,377 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:54,378 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-28 23:43:58,141 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:43:58,251 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17428 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:43:58,300 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:43:58,519 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked.
[2023-11-28 23:43:58,519 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:43:58,519 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:43:58,520 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217001178]
[2023-11-28 23:43:58,520 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:43:58,520 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328601600]
[2023-11-28 23:43:58,520 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [328601600] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:43:58,520 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:43:58,521 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:43:58,521 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804730704]
[2023-11-28 23:43:58,521 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:43:58,524 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:43:58,524 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:43:58,526 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:43:58,526 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:43:58,527 INFO  L87              Difference]: Start difference. First operand 6072 states and 10088 transitions. Second operand  has 7 states, 7 states have (on average 496.14285714285717) internal successors, (3473), 7 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:58,877 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:43:58,877 INFO  L93              Difference]: Finished difference Result 15860 states and 26339 transitions.
[2023-11-28 23:43:58,877 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:43:58,878 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 496.14285714285717) internal successors, (3473), 7 states have internal predecessors, (3473), 0 states have call successors, (0), 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 4030
[2023-11-28 23:43:58,881 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:43:58,889 INFO  L225             Difference]: With dead ends: 15860
[2023-11-28 23:43:58,889 INFO  L226             Difference]: Without dead ends: 10883
[2023-11-28 23:43:58,894 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4039 GetRequests, 4027 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:43:58,895 INFO  L413           NwaCegarLoop]: 9850 mSDtfsCounter, 22850 mSDsluCounter, 37989 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22850 SdHoareTripleChecker+Valid, 47839 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:43:58,895 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22850 Valid, 47839 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:43:58,906 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10883 states.
[2023-11-28 23:43:58,961 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10883 to 6077.
[2023-11-28 23:43:58,966 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6077 states, 6076 states have (on average 1.6614549045424623) internal successors, (10095), 6076 states have internal predecessors, (10095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:58,973 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 10095 transitions.
[2023-11-28 23:43:58,973 INFO  L78                 Accepts]: Start accepts. Automaton has 6077 states and 10095 transitions. Word has length 4030
[2023-11-28 23:43:58,975 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:43:58,975 INFO  L495      AbstractCegarLoop]: Abstraction has 6077 states and 10095 transitions.
[2023-11-28 23:43:58,976 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 496.14285714285717) internal successors, (3473), 7 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:43:58,976 INFO  L276                IsEmpty]: Start isEmpty. Operand 6077 states and 10095 transitions.
[2023-11-28 23:43:59,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4032
[2023-11-28 23:43:59,048 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:43:59,049 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:43:59,096 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-28 23:43:59,249 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:59,250 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:43:59,250 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:43:59,251 INFO  L85        PathProgramCache]: Analyzing trace with hash 865627670, now seen corresponding path program 1 times
[2023-11-28 23:43:59,251 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:43:59,251 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878776796]
[2023-11-28 23:43:59,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:59,252 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:43:59,569 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:43:59,569 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983757864]
[2023-11-28 23:43:59,570 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:43:59,570 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:43:59,570 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:59,571 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:43:59,572 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-28 23:44:03,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:03,341 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17431 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:03,410 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:03,647 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked.
[2023-11-28 23:44:03,647 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:03,647 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:03,648 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878776796]
[2023-11-28 23:44:03,648 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:03,648 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983757864]
[2023-11-28 23:44:03,648 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983757864] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:03,648 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:03,649 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:03,650 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495518329]
[2023-11-28 23:44:03,650 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:03,652 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:03,652 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:03,654 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:03,654 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:03,655 INFO  L87              Difference]: Start difference. First operand 6077 states and 10095 transitions. Second operand  has 7 states, 7 states have (on average 496.85714285714283) internal successors, (3478), 7 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:04,009 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:04,009 INFO  L93              Difference]: Finished difference Result 15875 states and 26360 transitions.
[2023-11-28 23:44:04,010 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:04,011 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 496.85714285714283) internal successors, (3478), 7 states have internal predecessors, (3478), 0 states have call successors, (0), 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 4031
[2023-11-28 23:44:04,013 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:04,021 INFO  L225             Difference]: With dead ends: 15875
[2023-11-28 23:44:04,021 INFO  L226             Difference]: Without dead ends: 10887
[2023-11-28 23:44:04,026 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4040 GetRequests, 4028 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:04,026 INFO  L413           NwaCegarLoop]: 9840 mSDtfsCounter, 22854 mSDsluCounter, 37959 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22854 SdHoareTripleChecker+Valid, 47799 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:04,026 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22854 Valid, 47799 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:04,035 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10887 states.
[2023-11-28 23:44:04,091 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 6082.
[2023-11-28 23:44:04,096 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6082 states, 6081 states have (on average 1.6612399276434797) internal successors, (10102), 6081 states have internal predecessors, (10102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:04,103 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 10102 transitions.
[2023-11-28 23:44:04,103 INFO  L78                 Accepts]: Start accepts. Automaton has 6082 states and 10102 transitions. Word has length 4031
[2023-11-28 23:44:04,106 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:04,106 INFO  L495      AbstractCegarLoop]: Abstraction has 6082 states and 10102 transitions.
[2023-11-28 23:44:04,106 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 496.85714285714283) internal successors, (3478), 7 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:04,107 INFO  L276                IsEmpty]: Start isEmpty. Operand 6082 states and 10102 transitions.
[2023-11-28 23:44:04,191 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4033
[2023-11-28 23:44:04,191 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:04,192 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:44:04,240 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0
[2023-11-28 23:44:04,392 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:04,392 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:04,393 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:04,393 INFO  L85        PathProgramCache]: Analyzing trace with hash 681509648, now seen corresponding path program 1 times
[2023-11-28 23:44:04,394 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:04,394 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212205767]
[2023-11-28 23:44:04,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:04,394 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:04,709 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:04,709 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317768981]
[2023-11-28 23:44:04,710 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:04,710 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:04,711 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:04,711 INFO  L229       MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:04,712 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process
[2023-11-28 23:44:08,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:08,577 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17434 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:08,625 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:08,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked.
[2023-11-28 23:44:08,843 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:08,843 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:08,844 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212205767]
[2023-11-28 23:44:08,844 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:08,844 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317768981]
[2023-11-28 23:44:08,844 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [317768981] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:08,844 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:08,845 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:08,845 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544926648]
[2023-11-28 23:44:08,845 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:08,847 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:08,847 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:08,849 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:08,849 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:08,850 INFO  L87              Difference]: Start difference. First operand 6082 states and 10102 transitions. Second operand  has 7 states, 7 states have (on average 497.2857142857143) internal successors, (3481), 7 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:09,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:09,198 INFO  L93              Difference]: Finished difference Result 15887 states and 26376 transitions.
[2023-11-28 23:44:09,198 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:09,199 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 497.2857142857143) internal successors, (3481), 7 states have internal predecessors, (3481), 0 states have call successors, (0), 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 4032
[2023-11-28 23:44:09,202 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:09,210 INFO  L225             Difference]: With dead ends: 15887
[2023-11-28 23:44:09,210 INFO  L226             Difference]: Without dead ends: 10888
[2023-11-28 23:44:09,214 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4041 GetRequests, 4029 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:09,214 INFO  L413           NwaCegarLoop]: 9835 mSDtfsCounter, 22855 mSDsluCounter, 37944 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22855 SdHoareTripleChecker+Valid, 47779 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:09,215 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22855 Valid, 47779 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:09,224 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10888 states.
[2023-11-28 23:44:09,279 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10888 to 6084.
[2023-11-28 23:44:09,284 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6084 states, 6083 states have (on average 1.6610225217820154) internal successors, (10104), 6083 states have internal predecessors, (10104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:09,292 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 10104 transitions.
[2023-11-28 23:44:09,292 INFO  L78                 Accepts]: Start accepts. Automaton has 6084 states and 10104 transitions. Word has length 4032
[2023-11-28 23:44:09,294 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:09,295 INFO  L495      AbstractCegarLoop]: Abstraction has 6084 states and 10104 transitions.
[2023-11-28 23:44:09,295 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 497.2857142857143) internal successors, (3481), 7 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:09,296 INFO  L276                IsEmpty]: Start isEmpty. Operand 6084 states and 10104 transitions.
[2023-11-28 23:44:09,367 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4034
[2023-11-28 23:44:09,367 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:09,368 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:44:09,417 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0
[2023-11-28 23:44:09,569 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:09,569 INFO  L420      AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:09,569 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:09,570 INFO  L85        PathProgramCache]: Analyzing trace with hash 1765526384, now seen corresponding path program 1 times
[2023-11-28 23:44:09,570 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:09,570 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273744677]
[2023-11-28 23:44:09,570 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:09,570 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:09,872 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:09,872 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760844438]
[2023-11-28 23:44:09,873 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:09,873 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:09,873 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:09,874 INFO  L229       MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:09,875 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process
[2023-11-28 23:44:13,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:13,751 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17437 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:13,799 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:14,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked.
[2023-11-28 23:44:14,053 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:14,053 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:14,053 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273744677]
[2023-11-28 23:44:14,053 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:14,054 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760844438]
[2023-11-28 23:44:14,054 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [760844438] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:14,054 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:14,055 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:14,055 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551469991]
[2023-11-28 23:44:14,055 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:14,057 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:14,057 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:14,059 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:14,059 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:14,060 INFO  L87              Difference]: Start difference. First operand 6084 states and 10104 transitions. Second operand  has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:14,403 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:14,403 INFO  L93              Difference]: Finished difference Result 15896 states and 26387 transitions.
[2023-11-28 23:44:14,403 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:14,404 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 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 4033
[2023-11-28 23:44:14,407 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:14,415 INFO  L225             Difference]: With dead ends: 15896
[2023-11-28 23:44:14,415 INFO  L226             Difference]: Without dead ends: 10892
[2023-11-28 23:44:14,419 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4042 GetRequests, 4030 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:14,420 INFO  L413           NwaCegarLoop]: 9825 mSDtfsCounter, 22857 mSDsluCounter, 37914 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22857 SdHoareTripleChecker+Valid, 47739 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:14,420 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22857 Valid, 47739 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:14,431 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10892 states.
[2023-11-28 23:44:14,487 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10892 to 6089.
[2023-11-28 23:44:14,493 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6089 states, 6088 states have (on average 1.66080814717477) internal successors, (10111), 6088 states have internal predecessors, (10111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:14,500 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 10111 transitions.
[2023-11-28 23:44:14,500 INFO  L78                 Accepts]: Start accepts. Automaton has 6089 states and 10111 transitions. Word has length 4033
[2023-11-28 23:44:14,502 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:14,502 INFO  L495      AbstractCegarLoop]: Abstraction has 6089 states and 10111 transitions.
[2023-11-28 23:44:14,503 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 498.0) internal successors, (3486), 7 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:14,503 INFO  L276                IsEmpty]: Start isEmpty. Operand 6089 states and 10111 transitions.
[2023-11-28 23:44:14,578 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4035
[2023-11-28 23:44:14,579 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:14,579 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:44:14,630 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0
[2023-11-28 23:44:14,780 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:14,780 INFO  L420      AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:14,781 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:14,781 INFO  L85        PathProgramCache]: Analyzing trace with hash -817896038, now seen corresponding path program 1 times
[2023-11-28 23:44:14,781 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:14,781 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760044693]
[2023-11-28 23:44:14,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:14,782 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:15,103 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:15,104 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609303654]
[2023-11-28 23:44:15,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:15,105 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:15,105 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:15,105 INFO  L229       MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:15,107 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process
[2023-11-28 23:44:18,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:19,029 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17441 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:19,076 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:19,290 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked.
[2023-11-28 23:44:19,290 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:19,291 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:19,291 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760044693]
[2023-11-28 23:44:19,291 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:19,291 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609303654]
[2023-11-28 23:44:19,291 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609303654] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:19,291 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:19,293 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:19,293 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979991256]
[2023-11-28 23:44:19,293 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:19,295 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:19,295 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:19,297 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:19,297 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:19,298 INFO  L87              Difference]: Start difference. First operand 6089 states and 10111 transitions. Second operand  has 7 states, 7 states have (on average 498.7142857142857) internal successors, (3491), 7 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:19,653 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:19,653 INFO  L93              Difference]: Finished difference Result 15911 states and 26408 transitions.
[2023-11-28 23:44:19,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:19,654 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 498.7142857142857) internal successors, (3491), 7 states have internal predecessors, (3491), 0 states have call successors, (0), 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 4034
[2023-11-28 23:44:19,657 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:19,664 INFO  L225             Difference]: With dead ends: 15911
[2023-11-28 23:44:19,665 INFO  L226             Difference]: Without dead ends: 10896
[2023-11-28 23:44:19,669 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4043 GetRequests, 4031 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:19,669 INFO  L413           NwaCegarLoop]: 9815 mSDtfsCounter, 22861 mSDsluCounter, 37884 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22861 SdHoareTripleChecker+Valid, 47699 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:19,670 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22861 Valid, 47699 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:19,678 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10896 states.
[2023-11-28 23:44:19,735 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10896 to 6094.
[2023-11-28 23:44:19,740 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6094 states, 6093 states have (on average 1.660594124405055) internal successors, (10118), 6093 states have internal predecessors, (10118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:19,747 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6094 states to 6094 states and 10118 transitions.
[2023-11-28 23:44:19,747 INFO  L78                 Accepts]: Start accepts. Automaton has 6094 states and 10118 transitions. Word has length 4034
[2023-11-28 23:44:19,749 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:19,749 INFO  L495      AbstractCegarLoop]: Abstraction has 6094 states and 10118 transitions.
[2023-11-28 23:44:19,750 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 498.7142857142857) internal successors, (3491), 7 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:19,750 INFO  L276                IsEmpty]: Start isEmpty. Operand 6094 states and 10118 transitions.
[2023-11-28 23:44:19,827 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4036
[2023-11-28 23:44:19,827 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:19,829 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:44:19,878 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0
[2023-11-28 23:44:20,029 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2023-11-28 23:44:20,030 INFO  L420      AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:20,030 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:20,031 INFO  L85        PathProgramCache]: Analyzing trace with hash -1031543966, now seen corresponding path program 1 times
[2023-11-28 23:44:20,031 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:20,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570039590]
[2023-11-28 23:44:20,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:20,032 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:20,350 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:20,351 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024168062]
[2023-11-28 23:44:20,351 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:20,352 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:20,352 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:20,353 INFO  L229       MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:20,354 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process
[2023-11-28 23:44:24,032 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:24,142 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17444 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:24,191 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:24,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked.
[2023-11-28 23:44:24,427 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:24,427 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:24,427 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570039590]
[2023-11-28 23:44:24,428 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:24,428 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024168062]
[2023-11-28 23:44:24,428 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024168062] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:24,428 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:24,429 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:24,430 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938810148]
[2023-11-28 23:44:24,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:24,432 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:24,432 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:24,434 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:24,434 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:24,435 INFO  L87              Difference]: Start difference. First operand 6094 states and 10118 transitions. Second operand  has 7 states, 7 states have (on average 499.42857142857144) internal successors, (3496), 7 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:24,786 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:24,786 INFO  L93              Difference]: Finished difference Result 15926 states and 26429 transitions.
[2023-11-28 23:44:24,786 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:24,787 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 499.42857142857144) internal successors, (3496), 7 states have internal predecessors, (3496), 0 states have call successors, (0), 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 4035
[2023-11-28 23:44:24,790 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:24,798 INFO  L225             Difference]: With dead ends: 15926
[2023-11-28 23:44:24,798 INFO  L226             Difference]: Without dead ends: 10900
[2023-11-28 23:44:24,802 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4044 GetRequests, 4032 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:24,802 INFO  L413           NwaCegarLoop]: 9805 mSDtfsCounter, 22865 mSDsluCounter, 37854 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22865 SdHoareTripleChecker+Valid, 47659 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:24,803 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22865 Valid, 47659 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:24,812 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10900 states.
[2023-11-28 23:44:24,867 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10900 to 6099.
[2023-11-28 23:44:24,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6099 states, 6098 states have (on average 1.6603804526074122) internal successors, (10125), 6098 states have internal predecessors, (10125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:24,879 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 10125 transitions.
[2023-11-28 23:44:24,879 INFO  L78                 Accepts]: Start accepts. Automaton has 6099 states and 10125 transitions. Word has length 4035
[2023-11-28 23:44:24,881 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:24,882 INFO  L495      AbstractCegarLoop]: Abstraction has 6099 states and 10125 transitions.
[2023-11-28 23:44:24,882 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 499.42857142857144) internal successors, (3496), 7 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:24,882 INFO  L276                IsEmpty]: Start isEmpty. Operand 6099 states and 10125 transitions.
[2023-11-28 23:44:24,955 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4037
[2023-11-28 23:44:24,955 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:24,956 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:44:25,003 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0
[2023-11-28 23:44:25,156 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:25,157 INFO  L420      AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:25,157 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:25,157 INFO  L85        PathProgramCache]: Analyzing trace with hash 1589399716, now seen corresponding path program 1 times
[2023-11-28 23:44:25,158 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:25,158 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550095458]
[2023-11-28 23:44:25,158 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:25,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:25,481 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:25,482 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149438661]
[2023-11-28 23:44:25,482 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:25,483 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:25,483 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:25,484 INFO  L229       MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:25,484 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process
[2023-11-28 23:44:29,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:29,411 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17448 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:29,460 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:29,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked.
[2023-11-28 23:44:29,722 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:29,722 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:29,722 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550095458]
[2023-11-28 23:44:29,722 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:29,722 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149438661]
[2023-11-28 23:44:29,722 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149438661] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:29,722 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:29,724 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:29,724 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681035179]
[2023-11-28 23:44:29,724 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:29,726 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:29,726 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:29,728 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:29,728 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:29,729 INFO  L87              Difference]: Start difference. First operand 6099 states and 10125 transitions. Second operand  has 7 states, 7 states have (on average 500.14285714285717) internal successors, (3501), 7 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:30,151 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:30,151 INFO  L93              Difference]: Finished difference Result 15941 states and 26450 transitions.
[2023-11-28 23:44:30,152 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:30,152 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 500.14285714285717) internal successors, (3501), 7 states have internal predecessors, (3501), 0 states have call successors, (0), 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 4036
[2023-11-28 23:44:30,156 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:30,163 INFO  L225             Difference]: With dead ends: 15941
[2023-11-28 23:44:30,163 INFO  L226             Difference]: Without dead ends: 10904
[2023-11-28 23:44:30,167 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4045 GetRequests, 4033 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:30,168 INFO  L413           NwaCegarLoop]: 9795 mSDtfsCounter, 22869 mSDsluCounter, 37824 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22869 SdHoareTripleChecker+Valid, 47619 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:30,168 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22869 Valid, 47619 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:30,178 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10904 states.
[2023-11-28 23:44:30,234 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10904 to 6104.
[2023-11-28 23:44:30,239 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6104 states, 6103 states have (on average 1.66016713091922) internal successors, (10132), 6103 states have internal predecessors, (10132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:30,246 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 10132 transitions.
[2023-11-28 23:44:30,247 INFO  L78                 Accepts]: Start accepts. Automaton has 6104 states and 10132 transitions. Word has length 4036
[2023-11-28 23:44:30,249 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:30,249 INFO  L495      AbstractCegarLoop]: Abstraction has 6104 states and 10132 transitions.
[2023-11-28 23:44:30,250 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 500.14285714285717) internal successors, (3501), 7 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:30,250 INFO  L276                IsEmpty]: Start isEmpty. Operand 6104 states and 10132 transitions.
[2023-11-28 23:44:30,327 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4038
[2023-11-28 23:44:30,327 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:30,328 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:44:30,378 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0
[2023-11-28 23:44:30,528 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:30,529 INFO  L420      AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:30,529 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:30,530 INFO  L85        PathProgramCache]: Analyzing trace with hash -553900076, now seen corresponding path program 1 times
[2023-11-28 23:44:30,530 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:30,530 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776023222]
[2023-11-28 23:44:30,530 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:30,531 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:30,846 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:30,846 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38719499]
[2023-11-28 23:44:30,847 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:30,847 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:30,847 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:30,848 INFO  L229       MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:30,849 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process
[2023-11-28 23:44:34,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:34,590 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17451 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:34,639 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:34,867 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked.
[2023-11-28 23:44:34,867 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:34,868 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:34,868 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776023222]
[2023-11-28 23:44:34,868 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:34,868 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38719499]
[2023-11-28 23:44:34,868 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [38719499] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:34,868 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:34,869 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:34,869 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282973217]
[2023-11-28 23:44:34,870 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:34,872 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:34,873 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:34,876 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:34,876 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:34,877 INFO  L87              Difference]: Start difference. First operand 6104 states and 10132 transitions. Second operand  has 7 states, 7 states have (on average 500.85714285714283) internal successors, (3506), 7 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:35,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:35,227 INFO  L93              Difference]: Finished difference Result 15956 states and 26471 transitions.
[2023-11-28 23:44:35,228 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:35,229 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 500.85714285714283) internal successors, (3506), 7 states have internal predecessors, (3506), 0 states have call successors, (0), 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 4037
[2023-11-28 23:44:35,232 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:35,239 INFO  L225             Difference]: With dead ends: 15956
[2023-11-28 23:44:35,240 INFO  L226             Difference]: Without dead ends: 10908
[2023-11-28 23:44:35,244 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4046 GetRequests, 4034 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:35,244 INFO  L413           NwaCegarLoop]: 9785 mSDtfsCounter, 22873 mSDsluCounter, 37794 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22873 SdHoareTripleChecker+Valid, 47579 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:35,245 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22873 Valid, 47579 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:35,254 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10908 states.
[2023-11-28 23:44:35,311 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 6109.
[2023-11-28 23:44:35,316 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6109 states, 6108 states have (on average 1.6599541584806812) internal successors, (10139), 6108 states have internal predecessors, (10139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:35,323 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 10139 transitions.
[2023-11-28 23:44:35,323 INFO  L78                 Accepts]: Start accepts. Automaton has 6109 states and 10139 transitions. Word has length 4037
[2023-11-28 23:44:35,325 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:35,325 INFO  L495      AbstractCegarLoop]: Abstraction has 6109 states and 10139 transitions.
[2023-11-28 23:44:35,326 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 500.85714285714283) internal successors, (3506), 7 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:35,326 INFO  L276                IsEmpty]: Start isEmpty. Operand 6109 states and 10139 transitions.
[2023-11-28 23:44:35,404 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4039
[2023-11-28 23:44:35,404 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:35,405 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:44:35,458 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0
[2023-11-28 23:44:35,605 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:35,606 INFO  L420      AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:35,606 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:35,607 INFO  L85        PathProgramCache]: Analyzing trace with hash -672373714, now seen corresponding path program 1 times
[2023-11-28 23:44:35,607 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:35,607 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531611573]
[2023-11-28 23:44:35,608 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:35,608 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:35,924 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:35,925 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957796664]
[2023-11-28 23:44:35,925 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:35,925 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:35,926 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:35,926 INFO  L229       MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:35,927 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process
[2023-11-28 23:44:39,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:39,800 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17455 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:39,851 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:40,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked.
[2023-11-28 23:44:40,089 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:40,089 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:40,089 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531611573]
[2023-11-28 23:44:40,089 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:40,089 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957796664]
[2023-11-28 23:44:40,089 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [957796664] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:40,089 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:40,091 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:40,091 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993876196]
[2023-11-28 23:44:40,091 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:40,093 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:40,093 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:40,095 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:40,095 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:40,096 INFO  L87              Difference]: Start difference. First operand 6109 states and 10139 transitions. Second operand  has 7 states, 7 states have (on average 501.57142857142856) internal successors, (3511), 7 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:40,474 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:40,474 INFO  L93              Difference]: Finished difference Result 15971 states and 26492 transitions.
[2023-11-28 23:44:40,475 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:40,476 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 501.57142857142856) internal successors, (3511), 7 states have internal predecessors, (3511), 0 states have call successors, (0), 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 4038
[2023-11-28 23:44:40,479 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:40,488 INFO  L225             Difference]: With dead ends: 15971
[2023-11-28 23:44:40,489 INFO  L226             Difference]: Without dead ends: 10912
[2023-11-28 23:44:40,493 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4047 GetRequests, 4035 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:40,494 INFO  L413           NwaCegarLoop]: 9775 mSDtfsCounter, 22877 mSDsluCounter, 37764 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22877 SdHoareTripleChecker+Valid, 47539 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:40,494 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22877 Valid, 47539 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:40,504 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10912 states.
[2023-11-28 23:44:40,560 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10912 to 6114.
[2023-11-28 23:44:40,565 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6114 states, 6113 states have (on average 1.659741534434811) internal successors, (10146), 6113 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:40,572 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 10146 transitions.
[2023-11-28 23:44:40,573 INFO  L78                 Accepts]: Start accepts. Automaton has 6114 states and 10146 transitions. Word has length 4038
[2023-11-28 23:44:40,575 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:40,575 INFO  L495      AbstractCegarLoop]: Abstraction has 6114 states and 10146 transitions.
[2023-11-28 23:44:40,576 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 501.57142857142856) internal successors, (3511), 7 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:40,576 INFO  L276                IsEmpty]: Start isEmpty. Operand 6114 states and 10146 transitions.
[2023-11-28 23:44:40,700 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4040
[2023-11-28 23:44:40,700 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:40,701 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:44:40,751 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0
[2023-11-28 23:44:40,902 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:40,902 INFO  L420      AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:40,903 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:40,904 INFO  L85        PathProgramCache]: Analyzing trace with hash -947504954, now seen corresponding path program 1 times
[2023-11-28 23:44:40,904 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:40,904 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428968257]
[2023-11-28 23:44:40,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:40,905 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:41,229 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:41,229 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848071672]
[2023-11-28 23:44:41,230 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:41,230 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:41,230 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:41,231 INFO  L229       MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:41,232 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process
[2023-11-28 23:44:44,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:45,017 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17458 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:45,065 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:45,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked.
[2023-11-28 23:44:45,281 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:45,282 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:45,282 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428968257]
[2023-11-28 23:44:45,282 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:45,282 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848071672]
[2023-11-28 23:44:45,282 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [848071672] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:45,282 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:45,284 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:45,284 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135746668]
[2023-11-28 23:44:45,284 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:45,286 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:45,286 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:45,288 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:45,289 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:45,290 INFO  L87              Difference]: Start difference. First operand 6114 states and 10146 transitions. Second operand  has 7 states, 7 states have (on average 502.2857142857143) internal successors, (3516), 7 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:45,648 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:45,648 INFO  L93              Difference]: Finished difference Result 15986 states and 26513 transitions.
[2023-11-28 23:44:45,648 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:45,649 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 502.2857142857143) internal successors, (3516), 7 states have internal predecessors, (3516), 0 states have call successors, (0), 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 4039
[2023-11-28 23:44:45,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:45,661 INFO  L225             Difference]: With dead ends: 15986
[2023-11-28 23:44:45,661 INFO  L226             Difference]: Without dead ends: 10916
[2023-11-28 23:44:45,665 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4048 GetRequests, 4036 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:45,666 INFO  L413           NwaCegarLoop]: 9765 mSDtfsCounter, 22881 mSDsluCounter, 37734 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22881 SdHoareTripleChecker+Valid, 47499 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:45,666 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22881 Valid, 47499 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:45,676 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10916 states.
[2023-11-28 23:44:45,733 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10916 to 6119.
[2023-11-28 23:44:45,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6119 states, 6118 states have (on average 1.6595292579274272) internal successors, (10153), 6118 states have internal predecessors, (10153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:45,745 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 10153 transitions.
[2023-11-28 23:44:45,746 INFO  L78                 Accepts]: Start accepts. Automaton has 6119 states and 10153 transitions. Word has length 4039
[2023-11-28 23:44:45,748 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:45,748 INFO  L495      AbstractCegarLoop]: Abstraction has 6119 states and 10153 transitions.
[2023-11-28 23:44:45,749 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 502.2857142857143) internal successors, (3516), 7 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:45,749 INFO  L276                IsEmpty]: Start isEmpty. Operand 6119 states and 10153 transitions.
[2023-11-28 23:44:45,828 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4041
[2023-11-28 23:44:45,828 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:45,829 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:44:45,878 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0
[2023-11-28 23:44:46,029 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31
[2023-11-28 23:44:46,030 INFO  L420      AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:46,030 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:46,031 INFO  L85        PathProgramCache]: Analyzing trace with hash 1959804984, now seen corresponding path program 1 times
[2023-11-28 23:44:46,031 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:46,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701409060]
[2023-11-28 23:44:46,031 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:46,032 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:46,355 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:46,355 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014734211]
[2023-11-28 23:44:46,356 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:46,356 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:46,357 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:46,357 INFO  L229       MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:46,358 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process
[2023-11-28 23:44:50,235 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:50,351 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17462 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:50,400 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:50,619 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked.
[2023-11-28 23:44:50,620 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:50,620 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:50,620 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701409060]
[2023-11-28 23:44:50,620 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:50,620 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014734211]
[2023-11-28 23:44:50,620 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014734211] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:50,620 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:50,622 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:50,622 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190575618]
[2023-11-28 23:44:50,622 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:50,625 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:50,625 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:50,627 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:50,627 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:50,628 INFO  L87              Difference]: Start difference. First operand 6119 states and 10153 transitions. Second operand  has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:50,963 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:50,963 INFO  L93              Difference]: Finished difference Result 16001 states and 26534 transitions.
[2023-11-28 23:44:50,963 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:50,964 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 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 4040
[2023-11-28 23:44:50,967 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:50,975 INFO  L225             Difference]: With dead ends: 16001
[2023-11-28 23:44:50,975 INFO  L226             Difference]: Without dead ends: 10920
[2023-11-28 23:44:50,979 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4049 GetRequests, 4037 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:50,979 INFO  L413           NwaCegarLoop]: 9755 mSDtfsCounter, 22885 mSDsluCounter, 37704 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22885 SdHoareTripleChecker+Valid, 47459 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:50,979 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22885 Valid, 47459 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:50,988 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10920 states.
[2023-11-28 23:44:51,049 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10920 to 6124.
[2023-11-28 23:44:51,054 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6124 states, 6123 states have (on average 1.659317328107137) internal successors, (10160), 6123 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:51,061 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 10160 transitions.
[2023-11-28 23:44:51,061 INFO  L78                 Accepts]: Start accepts. Automaton has 6124 states and 10160 transitions. Word has length 4040
[2023-11-28 23:44:51,063 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:51,063 INFO  L495      AbstractCegarLoop]: Abstraction has 6124 states and 10160 transitions.
[2023-11-28 23:44:51,064 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:51,064 INFO  L276                IsEmpty]: Start isEmpty. Operand 6124 states and 10160 transitions.
[2023-11-28 23:44:51,139 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4042
[2023-11-28 23:44:51,140 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:51,140 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:44:51,190 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0
[2023-11-28 23:44:51,341 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32
[2023-11-28 23:44:51,341 INFO  L420      AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:51,341 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:51,342 INFO  L85        PathProgramCache]: Analyzing trace with hash -659835336, now seen corresponding path program 1 times
[2023-11-28 23:44:51,342 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:51,342 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886433480]
[2023-11-28 23:44:51,342 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:51,343 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:51,672 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:51,672 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578579605]
[2023-11-28 23:44:51,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:51,673 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:51,673 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:51,674 INFO  L229       MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:51,675 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process
[2023-11-28 23:44:55,484 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:55,599 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17465 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:44:55,647 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:55,864 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked.
[2023-11-28 23:44:55,864 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:55,864 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:55,865 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886433480]
[2023-11-28 23:44:55,865 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:55,865 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578579605]
[2023-11-28 23:44:55,865 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578579605] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:55,865 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:55,866 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:44:55,866 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206077536]
[2023-11-28 23:44:55,866 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:55,868 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:44:55,868 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:55,870 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:44:55,870 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:55,871 INFO  L87              Difference]: Start difference. First operand 6124 states and 10160 transitions. Second operand  has 7 states, 7 states have (on average 503.7142857142857) internal successors, (3526), 7 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:56,236 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:56,236 INFO  L93              Difference]: Finished difference Result 16016 states and 26555 transitions.
[2023-11-28 23:44:56,236 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:44:56,237 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 503.7142857142857) internal successors, (3526), 7 states have internal predecessors, (3526), 0 states have call successors, (0), 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 4041
[2023-11-28 23:44:56,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:56,248 INFO  L225             Difference]: With dead ends: 16016
[2023-11-28 23:44:56,248 INFO  L226             Difference]: Without dead ends: 10924
[2023-11-28 23:44:56,252 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4050 GetRequests, 4038 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:44:56,253 INFO  L413           NwaCegarLoop]: 9745 mSDtfsCounter, 22889 mSDsluCounter, 37674 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22889 SdHoareTripleChecker+Valid, 47419 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:56,253 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22889 Valid, 47419 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:56,262 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10924 states.
[2023-11-28 23:44:56,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10924 to 6129.
[2023-11-28 23:44:56,325 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6129 states, 6128 states have (on average 1.6591057441253263) internal successors, (10167), 6128 states have internal predecessors, (10167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:56,332 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6129 states to 6129 states and 10167 transitions.
[2023-11-28 23:44:56,332 INFO  L78                 Accepts]: Start accepts. Automaton has 6129 states and 10167 transitions. Word has length 4041
[2023-11-28 23:44:56,334 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:56,334 INFO  L495      AbstractCegarLoop]: Abstraction has 6129 states and 10167 transitions.
[2023-11-28 23:44:56,335 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 503.7142857142857) internal successors, (3526), 7 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:56,335 INFO  L276                IsEmpty]: Start isEmpty. Operand 6129 states and 10167 transitions.
[2023-11-28 23:44:56,414 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4043
[2023-11-28 23:44:56,414 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:56,415 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:44:56,464 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0
[2023-11-28 23:44:56,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2023-11-28 23:44:56,616 INFO  L420      AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:56,616 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:56,616 INFO  L85        PathProgramCache]: Analyzing trace with hash 1653605570, now seen corresponding path program 1 times
[2023-11-28 23:44:56,617 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:56,617 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680953161]
[2023-11-28 23:44:56,617 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:56,617 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:56,949 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:56,949 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879863093]
[2023-11-28 23:44:56,950 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:56,950 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:56,950 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:56,951 INFO  L229       MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:56,952 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process
[2023-11-28 23:45:00,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:00,956 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17469 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:01,011 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:01,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked.
[2023-11-28 23:45:01,246 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:01,246 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:01,246 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680953161]
[2023-11-28 23:45:01,246 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:01,246 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879863093]
[2023-11-28 23:45:01,246 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879863093] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:01,246 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:01,247 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:01,248 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687132904]
[2023-11-28 23:45:01,248 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:01,249 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:01,250 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:01,251 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:01,252 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:01,252 INFO  L87              Difference]: Start difference. First operand 6129 states and 10167 transitions. Second operand  has 7 states, 7 states have (on average 504.42857142857144) internal successors, (3531), 7 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:01,608 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:01,608 INFO  L93              Difference]: Finished difference Result 16031 states and 26576 transitions.
[2023-11-28 23:45:01,608 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:01,609 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 504.42857142857144) internal successors, (3531), 7 states have internal predecessors, (3531), 0 states have call successors, (0), 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 4042
[2023-11-28 23:45:01,612 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:01,620 INFO  L225             Difference]: With dead ends: 16031
[2023-11-28 23:45:01,620 INFO  L226             Difference]: Without dead ends: 10928
[2023-11-28 23:45:01,624 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4051 GetRequests, 4039 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:01,625 INFO  L413           NwaCegarLoop]: 9735 mSDtfsCounter, 22893 mSDsluCounter, 37644 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22893 SdHoareTripleChecker+Valid, 47379 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:01,625 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22893 Valid, 47379 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:01,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10928 states.
[2023-11-28 23:45:01,691 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 6134.
[2023-11-28 23:45:01,696 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6134 states, 6133 states have (on average 1.6588945051361488) internal successors, (10174), 6133 states have internal predecessors, (10174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:01,704 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 10174 transitions.
[2023-11-28 23:45:01,704 INFO  L78                 Accepts]: Start accepts. Automaton has 6134 states and 10174 transitions. Word has length 4042
[2023-11-28 23:45:01,706 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:01,706 INFO  L495      AbstractCegarLoop]: Abstraction has 6134 states and 10174 transitions.
[2023-11-28 23:45:01,707 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 504.42857142857144) internal successors, (3531), 7 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:01,707 INFO  L276                IsEmpty]: Start isEmpty. Operand 6134 states and 10174 transitions.
[2023-11-28 23:45:01,786 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4044
[2023-11-28 23:45:01,787 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:01,787 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:45:01,837 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0
[2023-11-28 23:45:01,988 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34
[2023-11-28 23:45:01,988 INFO  L420      AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:01,988 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:01,989 INFO  L85        PathProgramCache]: Analyzing trace with hash -996261846, now seen corresponding path program 1 times
[2023-11-28 23:45:01,989 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:01,989 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453409659]
[2023-11-28 23:45:01,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:01,990 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:02,312 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:02,313 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979490553]
[2023-11-28 23:45:02,313 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:02,314 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:02,314 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:02,314 INFO  L229       MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:02,315 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process
[2023-11-28 23:45:06,182 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:06,288 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17472 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:06,335 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:06,561 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked.
[2023-11-28 23:45:06,561 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:06,562 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:06,562 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453409659]
[2023-11-28 23:45:06,562 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:06,562 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979490553]
[2023-11-28 23:45:06,562 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979490553] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:06,562 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:06,564 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:06,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733026216]
[2023-11-28 23:45:06,564 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:06,566 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:06,566 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:06,568 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:06,569 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:06,569 INFO  L87              Difference]: Start difference. First operand 6134 states and 10174 transitions. Second operand  has 7 states, 7 states have (on average 505.14285714285717) internal successors, (3536), 7 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:06,919 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:06,919 INFO  L93              Difference]: Finished difference Result 16046 states and 26597 transitions.
[2023-11-28 23:45:06,919 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:06,920 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 505.14285714285717) internal successors, (3536), 7 states have internal predecessors, (3536), 0 states have call successors, (0), 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 4043
[2023-11-28 23:45:06,923 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:06,932 INFO  L225             Difference]: With dead ends: 16046
[2023-11-28 23:45:06,932 INFO  L226             Difference]: Without dead ends: 10932
[2023-11-28 23:45:06,936 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4052 GetRequests, 4040 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:06,937 INFO  L413           NwaCegarLoop]: 9725 mSDtfsCounter, 22897 mSDsluCounter, 37614 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22897 SdHoareTripleChecker+Valid, 47339 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:06,937 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22897 Valid, 47339 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:06,946 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10932 states.
[2023-11-28 23:45:07,003 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10932 to 6139.
[2023-11-28 23:45:07,008 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6139 states, 6138 states have (on average 1.6586836102965135) internal successors, (10181), 6138 states have internal predecessors, (10181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:07,016 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 10181 transitions.
[2023-11-28 23:45:07,016 INFO  L78                 Accepts]: Start accepts. Automaton has 6139 states and 10181 transitions. Word has length 4043
[2023-11-28 23:45:07,018 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:07,018 INFO  L495      AbstractCegarLoop]: Abstraction has 6139 states and 10181 transitions.
[2023-11-28 23:45:07,019 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 505.14285714285717) internal successors, (3536), 7 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:07,019 INFO  L276                IsEmpty]: Start isEmpty. Operand 6139 states and 10181 transitions.
[2023-11-28 23:45:07,098 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4045
[2023-11-28 23:45:07,098 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:07,099 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:07,149 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0
[2023-11-28 23:45:07,299 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35
[2023-11-28 23:45:07,300 INFO  L420      AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:07,300 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:07,301 INFO  L85        PathProgramCache]: Analyzing trace with hash -75771444, now seen corresponding path program 1 times
[2023-11-28 23:45:07,301 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:07,301 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548408077]
[2023-11-28 23:45:07,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:07,302 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:07,630 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:07,631 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341595874]
[2023-11-28 23:45:07,632 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:07,632 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:07,632 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:07,633 INFO  L229       MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:07,634 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process
[2023-11-28 23:45:11,403 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:11,513 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17476 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:11,560 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:11,799 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked.
[2023-11-28 23:45:11,800 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:11,800 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:11,800 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548408077]
[2023-11-28 23:45:11,800 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:11,800 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341595874]
[2023-11-28 23:45:11,800 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341595874] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:11,800 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:11,802 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:11,802 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731780437]
[2023-11-28 23:45:11,802 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:11,804 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:11,804 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:11,807 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:11,808 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:11,809 INFO  L87              Difference]: Start difference. First operand 6139 states and 10181 transitions. Second operand  has 7 states, 7 states have (on average 505.57142857142856) internal successors, (3539), 7 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:12,163 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:12,163 INFO  L93              Difference]: Finished difference Result 16058 states and 26613 transitions.
[2023-11-28 23:45:12,163 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:12,164 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 505.57142857142856) internal successors, (3539), 7 states have internal predecessors, (3539), 0 states have call successors, (0), 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 4044
[2023-11-28 23:45:12,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:12,175 INFO  L225             Difference]: With dead ends: 16058
[2023-11-28 23:45:12,175 INFO  L226             Difference]: Without dead ends: 10933
[2023-11-28 23:45:12,180 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4053 GetRequests, 4041 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:12,180 INFO  L413           NwaCegarLoop]: 9720 mSDtfsCounter, 22898 mSDsluCounter, 37599 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22898 SdHoareTripleChecker+Valid, 47319 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:12,180 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22898 Valid, 47319 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:12,190 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10933 states.
[2023-11-28 23:45:12,247 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10933 to 6141.
[2023-11-28 23:45:12,252 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6141 states, 6140 states have (on average 1.6584690553745929) internal successors, (10183), 6140 states have internal predecessors, (10183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:12,260 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 10183 transitions.
[2023-11-28 23:45:12,260 INFO  L78                 Accepts]: Start accepts. Automaton has 6141 states and 10183 transitions. Word has length 4044
[2023-11-28 23:45:12,262 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:12,262 INFO  L495      AbstractCegarLoop]: Abstraction has 6141 states and 10183 transitions.
[2023-11-28 23:45:12,263 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 505.57142857142856) internal successors, (3539), 7 states have internal predecessors, (3539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:12,263 INFO  L276                IsEmpty]: Start isEmpty. Operand 6141 states and 10183 transitions.
[2023-11-28 23:45:12,341 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4046
[2023-11-28 23:45:12,341 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:12,342 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:12,392 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0
[2023-11-28 23:45:12,542 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36
[2023-11-28 23:45:12,543 INFO  L420      AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:12,543 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:12,544 INFO  L85        PathProgramCache]: Analyzing trace with hash -615158910, now seen corresponding path program 1 times
[2023-11-28 23:45:12,544 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:12,544 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471680565]
[2023-11-28 23:45:12,544 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:12,544 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:12,872 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:12,872 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557754563]
[2023-11-28 23:45:12,873 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:12,873 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:12,873 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:12,874 INFO  L229       MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:12,875 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process
[2023-11-28 23:45:16,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:16,760 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17479 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:45:16,895 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:17,132 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked.
[2023-11-28 23:45:17,132 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:17,132 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:17,132 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471680565]
[2023-11-28 23:45:17,132 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:17,132 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557754563]
[2023-11-28 23:45:17,132 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557754563] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:17,132 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:17,134 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:45:17,134 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049319263]
[2023-11-28 23:45:17,134 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:17,136 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:45:17,136 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:17,138 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:45:17,138 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:45:17,139 INFO  L87              Difference]: Start difference. First operand 6141 states and 10183 transitions. Second operand  has 8 states, 8 states have (on average 443.0) internal successors, (3544), 8 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:17,563 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:17,563 INFO  L93              Difference]: Finished difference Result 16069 states and 26626 transitions.
[2023-11-28 23:45:17,563 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-11-28 23:45:17,564 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 443.0) internal successors, (3544), 8 states have internal predecessors, (3544), 0 states have call successors, (0), 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 4045
[2023-11-28 23:45:17,567 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:17,575 INFO  L225             Difference]: With dead ends: 16069
[2023-11-28 23:45:17,575 INFO  L226             Difference]: Without dead ends: 10939
[2023-11-28 23:45:17,579 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4055 GetRequests, 4041 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2023-11-28 23:45:17,580 INFO  L413           NwaCegarLoop]: 9709 mSDtfsCounter, 22899 mSDsluCounter, 47268 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22899 SdHoareTripleChecker+Valid, 56977 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:17,580 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22899 Valid, 56977 Invalid, 74 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:17,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10939 states.
[2023-11-28 23:45:17,654 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10939 to 6146.
[2023-11-28 23:45:17,659 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6146 states, 6145 states have (on average 1.6582587469487389) internal successors, (10190), 6145 states have internal predecessors, (10190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:17,666 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 10190 transitions.
[2023-11-28 23:45:17,667 INFO  L78                 Accepts]: Start accepts. Automaton has 6146 states and 10190 transitions. Word has length 4045
[2023-11-28 23:45:17,669 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:17,669 INFO  L495      AbstractCegarLoop]: Abstraction has 6146 states and 10190 transitions.
[2023-11-28 23:45:17,670 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 443.0) internal successors, (3544), 8 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:17,670 INFO  L276                IsEmpty]: Start isEmpty. Operand 6146 states and 10190 transitions.
[2023-11-28 23:45:17,748 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4047
[2023-11-28 23:45:17,748 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:17,749 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:17,797 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0
[2023-11-28 23:45:17,949 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37
[2023-11-28 23:45:17,950 INFO  L420      AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:17,950 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:17,950 INFO  L85        PathProgramCache]: Analyzing trace with hash -520599720, now seen corresponding path program 1 times
[2023-11-28 23:45:17,950 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:17,950 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132141794]
[2023-11-28 23:45:17,951 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:17,951 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:18,278 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:18,278 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448994344]
[2023-11-28 23:45:18,279 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:18,279 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:18,279 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:18,280 INFO  L229       MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:18,281 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process
[2023-11-28 23:45:21,966 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:22,078 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17482 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:22,125 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:22,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked.
[2023-11-28 23:45:22,364 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:22,364 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:22,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132141794]
[2023-11-28 23:45:22,364 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:22,364 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448994344]
[2023-11-28 23:45:22,365 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448994344] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:22,365 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:22,366 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:22,366 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841577122]
[2023-11-28 23:45:22,366 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:22,368 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:22,368 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:22,369 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:22,370 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:22,370 INFO  L87              Difference]: Start difference. First operand 6146 states and 10190 transitions. Second operand  has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:22,729 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:22,729 INFO  L93              Difference]: Finished difference Result 16082 states and 26645 transitions.
[2023-11-28 23:45:22,730 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:22,731 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 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 4046
[2023-11-28 23:45:22,734 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:22,742 INFO  L225             Difference]: With dead ends: 16082
[2023-11-28 23:45:22,742 INFO  L226             Difference]: Without dead ends: 10941
[2023-11-28 23:45:22,746 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4055 GetRequests, 4043 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:22,747 INFO  L413           NwaCegarLoop]: 9700 mSDtfsCounter, 22904 mSDsluCounter, 37539 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22904 SdHoareTripleChecker+Valid, 47239 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:22,747 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22904 Valid, 47239 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:22,756 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10941 states.
[2023-11-28 23:45:22,816 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10941 to 6151.
[2023-11-28 23:45:22,821 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6151 states, 6150 states have (on average 1.6580487804878048) internal successors, (10197), 6150 states have internal predecessors, (10197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:22,830 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 10197 transitions.
[2023-11-28 23:45:22,830 INFO  L78                 Accepts]: Start accepts. Automaton has 6151 states and 10197 transitions. Word has length 4046
[2023-11-28 23:45:22,832 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:22,832 INFO  L495      AbstractCegarLoop]: Abstraction has 6151 states and 10197 transitions.
[2023-11-28 23:45:22,833 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:22,833 INFO  L276                IsEmpty]: Start isEmpty. Operand 6151 states and 10197 transitions.
[2023-11-28 23:45:22,913 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4048
[2023-11-28 23:45:22,913 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:22,914 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:45:22,963 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0
[2023-11-28 23:45:23,114 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38
[2023-11-28 23:45:23,115 INFO  L420      AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:23,115 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:23,116 INFO  L85        PathProgramCache]: Analyzing trace with hash -744814858, now seen corresponding path program 1 times
[2023-11-28 23:45:23,116 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:23,116 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265725038]
[2023-11-28 23:45:23,116 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:23,116 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:23,441 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:23,441 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202282162]
[2023-11-28 23:45:23,442 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:23,442 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:23,442 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:23,443 INFO  L229       MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:23,444 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process
[2023-11-28 23:45:27,136 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:27,252 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17485 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:27,300 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:27,524 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked.
[2023-11-28 23:45:27,524 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:27,524 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:27,524 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265725038]
[2023-11-28 23:45:27,524 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:27,524 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202282162]
[2023-11-28 23:45:27,524 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [202282162] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:27,525 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:27,526 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:27,526 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103068676]
[2023-11-28 23:45:27,526 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:27,528 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:27,528 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:27,530 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:27,530 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:27,531 INFO  L87              Difference]: Start difference. First operand 6151 states and 10197 transitions. Second operand  has 7 states, 7 states have (on average 507.7142857142857) internal successors, (3554), 7 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:27,923 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:27,924 INFO  L93              Difference]: Finished difference Result 16097 states and 26666 transitions.
[2023-11-28 23:45:27,924 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:27,925 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 507.7142857142857) internal successors, (3554), 7 states have internal predecessors, (3554), 0 states have call successors, (0), 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 4047
[2023-11-28 23:45:27,928 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:27,936 INFO  L225             Difference]: With dead ends: 16097
[2023-11-28 23:45:27,936 INFO  L226             Difference]: Without dead ends: 10945
[2023-11-28 23:45:27,940 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4056 GetRequests, 4044 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:27,940 INFO  L413           NwaCegarLoop]: 9690 mSDtfsCounter, 22908 mSDsluCounter, 37509 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22908 SdHoareTripleChecker+Valid, 47199 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:27,940 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22908 Valid, 47199 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:27,949 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10945 states.
[2023-11-28 23:45:28,009 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 6156.
[2023-11-28 23:45:28,014 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6156 states, 6155 states have (on average 1.6578391551584077) internal successors, (10204), 6155 states have internal predecessors, (10204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:28,022 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 10204 transitions.
[2023-11-28 23:45:28,022 INFO  L78                 Accepts]: Start accepts. Automaton has 6156 states and 10204 transitions. Word has length 4047
[2023-11-28 23:45:28,024 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:28,024 INFO  L495      AbstractCegarLoop]: Abstraction has 6156 states and 10204 transitions.
[2023-11-28 23:45:28,025 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 507.7142857142857) internal successors, (3554), 7 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:28,025 INFO  L276                IsEmpty]: Start isEmpty. Operand 6156 states and 10204 transitions.
[2023-11-28 23:45:28,102 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4049
[2023-11-28 23:45:28,102 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:28,103 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:28,151 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0
[2023-11-28 23:45:28,303 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39
[2023-11-28 23:45:28,304 INFO  L420      AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:28,304 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:28,304 INFO  L85        PathProgramCache]: Analyzing trace with hash -1578997020, now seen corresponding path program 1 times
[2023-11-28 23:45:28,305 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:28,305 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568395756]
[2023-11-28 23:45:28,305 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:28,305 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:28,626 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:28,626 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888089134]
[2023-11-28 23:45:28,627 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:28,627 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:28,627 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:28,628 INFO  L229       MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:28,629 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process
[2023-11-28 23:45:32,514 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:32,626 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17488 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:32,674 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:32,908 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked.
[2023-11-28 23:45:32,908 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:32,908 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:32,908 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568395756]
[2023-11-28 23:45:32,908 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:32,908 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888089134]
[2023-11-28 23:45:32,909 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [888089134] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:32,909 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:32,910 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:32,910 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509554970]
[2023-11-28 23:45:32,910 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:32,912 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:32,913 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:32,914 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:32,914 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:32,915 INFO  L87              Difference]: Start difference. First operand 6156 states and 10204 transitions. Second operand  has 7 states, 7 states have (on average 508.42857142857144) internal successors, (3559), 7 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:33,272 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:33,272 INFO  L93              Difference]: Finished difference Result 16112 states and 26687 transitions.
[2023-11-28 23:45:33,272 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:33,273 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 508.42857142857144) internal successors, (3559), 7 states have internal predecessors, (3559), 0 states have call successors, (0), 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 4048
[2023-11-28 23:45:33,276 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:33,283 INFO  L225             Difference]: With dead ends: 16112
[2023-11-28 23:45:33,284 INFO  L226             Difference]: Without dead ends: 10949
[2023-11-28 23:45:33,288 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4057 GetRequests, 4045 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:33,288 INFO  L413           NwaCegarLoop]: 9680 mSDtfsCounter, 22912 mSDsluCounter, 37479 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22912 SdHoareTripleChecker+Valid, 47159 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:33,288 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22912 Valid, 47159 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:33,300 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10949 states.
[2023-11-28 23:45:33,361 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 6161.
[2023-11-28 23:45:33,367 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6161 states, 6160 states have (on average 1.6576298701298702) internal successors, (10211), 6160 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:33,374 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6161 states to 6161 states and 10211 transitions.
[2023-11-28 23:45:33,374 INFO  L78                 Accepts]: Start accepts. Automaton has 6161 states and 10211 transitions. Word has length 4048
[2023-11-28 23:45:33,377 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:33,377 INFO  L495      AbstractCegarLoop]: Abstraction has 6161 states and 10211 transitions.
[2023-11-28 23:45:33,377 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 508.42857142857144) internal successors, (3559), 7 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:33,377 INFO  L276                IsEmpty]: Start isEmpty. Operand 6161 states and 10211 transitions.
[2023-11-28 23:45:33,454 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4050
[2023-11-28 23:45:33,454 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:33,455 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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[2023-11-28 23:45:33,504 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0
[2023-11-28 23:45:33,655 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:33,656 INFO  L420      AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:33,656 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:33,656 INFO  L85        PathProgramCache]: Analyzing trace with hash -887663510, now seen corresponding path program 1 times
[2023-11-28 23:45:33,657 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:33,657 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387850212]
[2023-11-28 23:45:33,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:33,657 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:33,967 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:33,967 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554223211]
[2023-11-28 23:45:33,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:33,968 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:33,968 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:33,969 INFO  L229       MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:33,970 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process
[2023-11-28 23:45:37,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:37,856 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17491 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:37,904 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:38,139 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked.
[2023-11-28 23:45:38,139 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:38,139 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:38,139 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387850212]
[2023-11-28 23:45:38,139 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:38,139 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554223211]
[2023-11-28 23:45:38,139 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554223211] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:38,139 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:38,141 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:38,141 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062050241]
[2023-11-28 23:45:38,141 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:38,144 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:38,144 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:38,146 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:38,146 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:38,147 INFO  L87              Difference]: Start difference. First operand 6161 states and 10211 transitions. Second operand  has 7 states, 7 states have (on average 509.14285714285717) internal successors, (3564), 7 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:38,497 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:38,497 INFO  L93              Difference]: Finished difference Result 16127 states and 26708 transitions.
[2023-11-28 23:45:38,497 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:38,498 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 509.14285714285717) internal successors, (3564), 7 states have internal predecessors, (3564), 0 states have call successors, (0), 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 4049
[2023-11-28 23:45:38,501 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:38,509 INFO  L225             Difference]: With dead ends: 16127
[2023-11-28 23:45:38,509 INFO  L226             Difference]: Without dead ends: 10953
[2023-11-28 23:45:38,513 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4058 GetRequests, 4046 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:38,514 INFO  L413           NwaCegarLoop]: 9670 mSDtfsCounter, 22916 mSDsluCounter, 37449 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22916 SdHoareTripleChecker+Valid, 47119 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:38,514 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22916 Valid, 47119 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:38,525 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10953 states.
[2023-11-28 23:45:38,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10953 to 6166.
[2023-11-28 23:45:38,591 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6166 states, 6165 states have (on average 1.6574209245742093) internal successors, (10218), 6165 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:38,599 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 10218 transitions.
[2023-11-28 23:45:38,599 INFO  L78                 Accepts]: Start accepts. Automaton has 6166 states and 10218 transitions. Word has length 4049
[2023-11-28 23:45:38,601 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:38,601 INFO  L495      AbstractCegarLoop]: Abstraction has 6166 states and 10218 transitions.
[2023-11-28 23:45:38,602 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 509.14285714285717) internal successors, (3564), 7 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:38,602 INFO  L276                IsEmpty]: Start isEmpty. Operand 6166 states and 10218 transitions.
[2023-11-28 23:45:38,722 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4051
[2023-11-28 23:45:38,722 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:38,723 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:38,772 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0
[2023-11-28 23:45:38,923 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41
[2023-11-28 23:45:38,924 INFO  L420      AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:38,925 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:38,925 INFO  L85        PathProgramCache]: Analyzing trace with hash -912163728, now seen corresponding path program 1 times
[2023-11-28 23:45:38,925 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:38,925 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091438129]
[2023-11-28 23:45:38,926 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:38,926 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:39,255 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:39,255 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997734705]
[2023-11-28 23:45:39,256 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:39,256 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:39,256 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:39,257 INFO  L229       MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:39,258 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process
[2023-11-28 23:45:42,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:43,049 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17494 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:43,098 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:43,330 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked.
[2023-11-28 23:45:43,330 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:43,330 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:43,330 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091438129]
[2023-11-28 23:45:43,331 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:43,331 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997734705]
[2023-11-28 23:45:43,331 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997734705] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:43,331 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:43,332 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:43,332 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677229134]
[2023-11-28 23:45:43,332 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:43,334 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:43,334 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:43,336 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:43,336 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:43,337 INFO  L87              Difference]: Start difference. First operand 6166 states and 10218 transitions. Second operand  has 7 states, 7 states have (on average 509.85714285714283) internal successors, (3569), 7 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:43,681 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:43,681 INFO  L93              Difference]: Finished difference Result 16142 states and 26729 transitions.
[2023-11-28 23:45:43,681 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:43,682 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 509.85714285714283) internal successors, (3569), 7 states have internal predecessors, (3569), 0 states have call successors, (0), 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 4050
[2023-11-28 23:45:43,685 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:43,692 INFO  L225             Difference]: With dead ends: 16142
[2023-11-28 23:45:43,693 INFO  L226             Difference]: Without dead ends: 10957
[2023-11-28 23:45:43,697 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4059 GetRequests, 4047 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:43,697 INFO  L413           NwaCegarLoop]: 9660 mSDtfsCounter, 22920 mSDsluCounter, 37419 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22920 SdHoareTripleChecker+Valid, 47079 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:43,698 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22920 Valid, 47079 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:43,708 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10957 states.
[2023-11-28 23:45:43,766 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10957 to 6171.
[2023-11-28 23:45:43,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6171 states, 6170 states have (on average 1.6572123176661264) internal successors, (10225), 6170 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:43,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 10225 transitions.
[2023-11-28 23:45:43,778 INFO  L78                 Accepts]: Start accepts. Automaton has 6171 states and 10225 transitions. Word has length 4050
[2023-11-28 23:45:43,781 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:43,781 INFO  L495      AbstractCegarLoop]: Abstraction has 6171 states and 10225 transitions.
[2023-11-28 23:45:43,782 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 509.85714285714283) internal successors, (3569), 7 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:43,782 INFO  L276                IsEmpty]: Start isEmpty. Operand 6171 states and 10225 transitions.
[2023-11-28 23:45:43,858 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4052
[2023-11-28 23:45:43,858 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:43,859 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:43,907 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0
[2023-11-28 23:45:44,059 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42
[2023-11-28 23:45:44,059 INFO  L420      AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:44,060 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:44,060 INFO  L85        PathProgramCache]: Analyzing trace with hash -1048374306, now seen corresponding path program 1 times
[2023-11-28 23:45:44,060 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:44,060 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200909095]
[2023-11-28 23:45:44,061 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:44,061 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:44,375 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:44,376 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242724421]
[2023-11-28 23:45:44,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:44,377 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:44,377 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:44,378 INFO  L229       MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:44,379 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process
[2023-11-28 23:45:48,076 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:48,184 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17497 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:48,232 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:48,469 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked.
[2023-11-28 23:45:48,470 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:48,470 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:48,470 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200909095]
[2023-11-28 23:45:48,470 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:48,470 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242724421]
[2023-11-28 23:45:48,470 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242724421] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:48,470 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:48,472 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:48,472 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846010782]
[2023-11-28 23:45:48,472 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:48,474 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:48,474 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:48,476 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:48,476 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:48,477 INFO  L87              Difference]: Start difference. First operand 6171 states and 10225 transitions. Second operand  has 7 states, 7 states have (on average 510.57142857142856) internal successors, (3574), 7 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:48,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:48,830 INFO  L93              Difference]: Finished difference Result 16157 states and 26750 transitions.
[2023-11-28 23:45:48,830 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:48,831 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 510.57142857142856) internal successors, (3574), 7 states have internal predecessors, (3574), 0 states have call successors, (0), 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 4051
[2023-11-28 23:45:48,834 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:48,842 INFO  L225             Difference]: With dead ends: 16157
[2023-11-28 23:45:48,842 INFO  L226             Difference]: Without dead ends: 10961
[2023-11-28 23:45:48,846 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4060 GetRequests, 4048 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:48,847 INFO  L413           NwaCegarLoop]: 9650 mSDtfsCounter, 22924 mSDsluCounter, 37389 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22924 SdHoareTripleChecker+Valid, 47039 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:48,847 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22924 Valid, 47039 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:48,856 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10961 states.
[2023-11-28 23:45:48,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 6176.
[2023-11-28 23:45:48,921 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6176 states, 6175 states have (on average 1.657004048582996) internal successors, (10232), 6175 states have internal predecessors, (10232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:48,929 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 10232 transitions.
[2023-11-28 23:45:48,929 INFO  L78                 Accepts]: Start accepts. Automaton has 6176 states and 10232 transitions. Word has length 4051
[2023-11-28 23:45:48,931 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:48,932 INFO  L495      AbstractCegarLoop]: Abstraction has 6176 states and 10232 transitions.
[2023-11-28 23:45:48,932 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 510.57142857142856) internal successors, (3574), 7 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:48,932 INFO  L276                IsEmpty]: Start isEmpty. Operand 6176 states and 10232 transitions.
[2023-11-28 23:45:49,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4053
[2023-11-28 23:45:49,012 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:49,012 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:49,062 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0
[2023-11-28 23:45:49,213 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:49,213 INFO  L420      AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:49,213 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:49,214 INFO  L85        PathProgramCache]: Analyzing trace with hash 1415363580, now seen corresponding path program 1 times
[2023-11-28 23:45:49,215 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:49,215 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525362482]
[2023-11-28 23:45:49,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:49,215 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:49,564 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:49,564 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974229495]
[2023-11-28 23:45:49,565 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:49,565 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:49,565 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:49,566 INFO  L229       MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:49,567 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process
[2023-11-28 23:45:53,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:53,437 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17500 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:45:53,485 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:53,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked.
[2023-11-28 23:45:53,704 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:53,704 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:53,704 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525362482]
[2023-11-28 23:45:53,704 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:53,704 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974229495]
[2023-11-28 23:45:53,704 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [974229495] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:53,704 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:53,706 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:45:53,706 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946492383]
[2023-11-28 23:45:53,706 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:53,708 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:45:53,708 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:53,710 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:45:53,710 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:45:53,711 INFO  L87              Difference]: Start difference. First operand 6176 states and 10232 transitions. Second operand  has 7 states, 7 states have (on average 511.2857142857143) internal successors, (3579), 7 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:54,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:54,068 INFO  L93              Difference]: Finished difference Result 16172 states and 26771 transitions.
[2023-11-28 23:45:54,068 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:45:54,069 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 511.2857142857143) internal successors, (3579), 7 states have internal predecessors, (3579), 0 states have call successors, (0), 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 4052
[2023-11-28 23:45:54,072 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:54,079 INFO  L225             Difference]: With dead ends: 16172
[2023-11-28 23:45:54,080 INFO  L226             Difference]: Without dead ends: 10965
[2023-11-28 23:45:54,084 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4061 GetRequests, 4049 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:45:54,084 INFO  L413           NwaCegarLoop]: 9640 mSDtfsCounter, 22928 mSDsluCounter, 37359 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22928 SdHoareTripleChecker+Valid, 46999 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:54,084 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22928 Valid, 46999 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:54,093 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10965 states.
[2023-11-28 23:45:54,151 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 6181.
[2023-11-28 23:45:54,157 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6181 states, 6180 states have (on average 1.6567961165048544) internal successors, (10239), 6180 states have internal predecessors, (10239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:54,164 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 10239 transitions.
[2023-11-28 23:45:54,165 INFO  L78                 Accepts]: Start accepts. Automaton has 6181 states and 10239 transitions. Word has length 4052
[2023-11-28 23:45:54,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:54,167 INFO  L495      AbstractCegarLoop]: Abstraction has 6181 states and 10239 transitions.
[2023-11-28 23:45:54,167 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 511.2857142857143) internal successors, (3579), 7 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:54,168 INFO  L276                IsEmpty]: Start isEmpty. Operand 6181 states and 10239 transitions.
[2023-11-28 23:45:54,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4054
[2023-11-28 23:45:54,244 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:54,245 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:54,293 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0
[2023-11-28 23:45:54,445 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:54,446 INFO  L420      AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:54,446 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:54,447 INFO  L85        PathProgramCache]: Analyzing trace with hash -136903342, now seen corresponding path program 1 times
[2023-11-28 23:45:54,447 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:54,447 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18223354]
[2023-11-28 23:45:54,448 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:54,448 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:45:54,775 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:45:54,775 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673650365]
[2023-11-28 23:45:54,776 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:54,776 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:45:54,777 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:45:54,777 INFO  L229       MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:45:54,779 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process
[2023-11-28 23:45:58,727 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:45:58,837 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17503 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:45:58,885 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:59,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked.
[2023-11-28 23:45:59,143 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:45:59,143 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:59,143 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18223354]
[2023-11-28 23:45:59,143 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:59,143 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673650365]
[2023-11-28 23:45:59,143 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [673650365] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:45:59,143 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:45:59,145 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:45:59,145 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352355173]
[2023-11-28 23:45:59,145 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:45:59,147 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:45:59,147 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:59,148 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:45:59,148 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:45:59,149 INFO  L87              Difference]: Start difference. First operand 6181 states and 10239 transitions. Second operand  has 8 states, 8 states have (on average 448.0) internal successors, (3584), 8 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:59,557 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:45:59,557 INFO  L93              Difference]: Finished difference Result 16189 states and 26794 transitions.
[2023-11-28 23:45:59,557 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-11-28 23:45:59,558 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 448.0) internal successors, (3584), 8 states have internal predecessors, (3584), 0 states have call successors, (0), 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 4053
[2023-11-28 23:45:59,561 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:45:59,569 INFO  L225             Difference]: With dead ends: 16189
[2023-11-28 23:45:59,570 INFO  L226             Difference]: Without dead ends: 10971
[2023-11-28 23:45:59,574 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4063 GetRequests, 4049 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2023-11-28 23:45:59,574 INFO  L413           NwaCegarLoop]: 9629 mSDtfsCounter, 22934 mSDsluCounter, 45223 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22934 SdHoareTripleChecker+Valid, 54852 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:45:59,575 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22934 Valid, 54852 Invalid, 66 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:45:59,585 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10971 states.
[2023-11-28 23:45:59,647 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6186.
[2023-11-28 23:45:59,652 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6186 states, 6185 states have (on average 1.6565885206143895) internal successors, (10246), 6185 states have internal predecessors, (10246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:59,660 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 10246 transitions.
[2023-11-28 23:45:59,660 INFO  L78                 Accepts]: Start accepts. Automaton has 6186 states and 10246 transitions. Word has length 4053
[2023-11-28 23:45:59,662 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:45:59,662 INFO  L495      AbstractCegarLoop]: Abstraction has 6186 states and 10246 transitions.
[2023-11-28 23:45:59,663 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 448.0) internal successors, (3584), 8 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:45:59,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 6186 states and 10246 transitions.
[2023-11-28 23:45:59,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4055
[2023-11-28 23:45:59,742 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:45:59,743 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:45:59,791 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0
[2023-11-28 23:45:59,943 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45
[2023-11-28 23:45:59,943 INFO  L420      AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:45:59,944 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:45:59,945 INFO  L85        PathProgramCache]: Analyzing trace with hash -889493112, now seen corresponding path program 1 times
[2023-11-28 23:45:59,945 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:45:59,945 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643238814]
[2023-11-28 23:45:59,946 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:45:59,946 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:46:00,271 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:46:00,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303574103]
[2023-11-28 23:46:00,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:00,272 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:46:00,272 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:46:00,273 INFO  L229       MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:46:00,274 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process
[2023-11-28 23:46:04,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:46:04,233 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17506 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:46:04,281 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:46:04,521 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked.
[2023-11-28 23:46:04,521 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:46:04,522 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:46:04,522 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643238814]
[2023-11-28 23:46:04,522 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:46:04,522 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303574103]
[2023-11-28 23:46:04,522 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303574103] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:46:04,522 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:46:04,523 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:46:04,523 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446159346]
[2023-11-28 23:46:04,523 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:46:04,525 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:46:04,525 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:46:04,527 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:46:04,527 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:46:04,528 INFO  L87              Difference]: Start difference. First operand 6186 states and 10246 transitions. Second operand  has 7 states, 7 states have (on average 512.7142857142857) internal successors, (3589), 7 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:04,881 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:46:04,881 INFO  L93              Difference]: Finished difference Result 16202 states and 26813 transitions.
[2023-11-28 23:46:04,881 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:46:04,882 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 512.7142857142857) internal successors, (3589), 7 states have internal predecessors, (3589), 0 states have call successors, (0), 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 4054
[2023-11-28 23:46:04,885 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:46:04,894 INFO  L225             Difference]: With dead ends: 16202
[2023-11-28 23:46:04,894 INFO  L226             Difference]: Without dead ends: 10973
[2023-11-28 23:46:04,898 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4063 GetRequests, 4051 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:46:04,898 INFO  L413           NwaCegarLoop]: 9620 mSDtfsCounter, 22936 mSDsluCounter, 37299 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22936 SdHoareTripleChecker+Valid, 46919 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:46:04,899 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22936 Valid, 46919 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:46:04,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10973 states.
[2023-11-28 23:46:04,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10973 to 6191.
[2023-11-28 23:46:04,972 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6191 states, 6190 states have (on average 1.6563812600969305) internal successors, (10253), 6190 states have internal predecessors, (10253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:04,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 10253 transitions.
[2023-11-28 23:46:04,980 INFO  L78                 Accepts]: Start accepts. Automaton has 6191 states and 10253 transitions. Word has length 4054
[2023-11-28 23:46:04,982 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:46:04,983 INFO  L495      AbstractCegarLoop]: Abstraction has 6191 states and 10253 transitions.
[2023-11-28 23:46:04,983 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 512.7142857142857) internal successors, (3589), 7 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:04,983 INFO  L276                IsEmpty]: Start isEmpty. Operand 6191 states and 10253 transitions.
[2023-11-28 23:46:05,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4056
[2023-11-28 23:46:05,062 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:46:05,063 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:46:05,111 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0
[2023-11-28 23:46:05,263 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:46:05,264 INFO  L420      AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:46:05,264 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:46:05,264 INFO  L85        PathProgramCache]: Analyzing trace with hash -733222714, now seen corresponding path program 1 times
[2023-11-28 23:46:05,265 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:46:05,265 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359794374]
[2023-11-28 23:46:05,265 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:05,266 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:46:05,580 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:46:05,580 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328974522]
[2023-11-28 23:46:05,581 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:05,581 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:46:05,581 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:46:05,582 INFO  L229       MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:46:05,583 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process
[2023-11-28 23:46:09,321 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:46:09,429 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17509 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:46:09,477 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:46:09,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2023-11-28 23:46:09,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:46:09,692 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:46:09,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359794374]
[2023-11-28 23:46:09,692 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:46:09,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328974522]
[2023-11-28 23:46:09,692 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [328974522] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:46:09,692 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:46:09,694 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:46:09,694 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93454086]
[2023-11-28 23:46:09,694 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:46:09,696 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:46:09,696 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:46:09,698 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:46:09,698 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:46:09,699 INFO  L87              Difference]: Start difference. First operand 6191 states and 10253 transitions. Second operand  has 7 states, 7 states have (on average 513.4285714285714) internal successors, (3594), 7 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:10,043 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:46:10,043 INFO  L93              Difference]: Finished difference Result 16217 states and 26834 transitions.
[2023-11-28 23:46:10,043 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:46:10,044 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 513.4285714285714) internal successors, (3594), 7 states have internal predecessors, (3594), 0 states have call successors, (0), 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 4055
[2023-11-28 23:46:10,047 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:46:10,055 INFO  L225             Difference]: With dead ends: 16217
[2023-11-28 23:46:10,055 INFO  L226             Difference]: Without dead ends: 10977
[2023-11-28 23:46:10,059 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4064 GetRequests, 4052 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:46:10,060 INFO  L413           NwaCegarLoop]: 9610 mSDtfsCounter, 22940 mSDsluCounter, 37269 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22940 SdHoareTripleChecker+Valid, 46879 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:46:10,060 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22940 Valid, 46879 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:46:10,070 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10977 states.
[2023-11-28 23:46:10,129 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 6196.
[2023-11-28 23:46:10,134 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6196 states, 6195 states have (on average 1.6561743341404358) internal successors, (10260), 6195 states have internal predecessors, (10260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:10,142 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 10260 transitions.
[2023-11-28 23:46:10,142 INFO  L78                 Accepts]: Start accepts. Automaton has 6196 states and 10260 transitions. Word has length 4055
[2023-11-28 23:46:10,144 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:46:10,144 INFO  L495      AbstractCegarLoop]: Abstraction has 6196 states and 10260 transitions.
[2023-11-28 23:46:10,145 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 513.4285714285714) internal successors, (3594), 7 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:10,145 INFO  L276                IsEmpty]: Start isEmpty. Operand 6196 states and 10260 transitions.
[2023-11-28 23:46:10,224 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4057
[2023-11-28 23:46:10,225 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:46:10,225 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:46:10,275 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0
[2023-11-28 23:46:10,426 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:46:10,426 INFO  L420      AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:46:10,426 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:46:10,428 INFO  L85        PathProgramCache]: Analyzing trace with hash 1596245268, now seen corresponding path program 1 times
[2023-11-28 23:46:10,428 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:46:10,428 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935072431]
[2023-11-28 23:46:10,429 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:10,429 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:46:10,746 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:46:10,746 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780415067]
[2023-11-28 23:46:10,747 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:10,747 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:46:10,747 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:46:10,748 INFO  L229       MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:46:10,749 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process
[2023-11-28 23:46:14,517 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:46:14,624 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17512 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:46:14,669 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:46:14,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked.
[2023-11-28 23:46:14,898 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:46:14,898 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:46:14,898 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935072431]
[2023-11-28 23:46:14,898 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:46:14,898 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780415067]
[2023-11-28 23:46:14,898 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [780415067] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:46:14,898 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:46:14,900 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:46:14,900 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055571932]
[2023-11-28 23:46:14,900 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:46:14,902 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:46:14,902 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:46:14,903 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:46:14,903 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:46:14,904 INFO  L87              Difference]: Start difference. First operand 6196 states and 10260 transitions. Second operand  has 7 states, 7 states have (on average 513.8571428571429) internal successors, (3597), 7 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:15,249 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:46:15,249 INFO  L93              Difference]: Finished difference Result 16229 states and 26850 transitions.
[2023-11-28 23:46:15,250 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:46:15,251 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 513.8571428571429) internal successors, (3597), 7 states have internal predecessors, (3597), 0 states have call successors, (0), 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 4056
[2023-11-28 23:46:15,254 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:46:15,262 INFO  L225             Difference]: With dead ends: 16229
[2023-11-28 23:46:15,262 INFO  L226             Difference]: Without dead ends: 10978
[2023-11-28 23:46:15,266 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4065 GetRequests, 4053 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:46:15,267 INFO  L413           NwaCegarLoop]: 9605 mSDtfsCounter, 22941 mSDsluCounter, 37254 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22941 SdHoareTripleChecker+Valid, 46859 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:46:15,267 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22941 Valid, 46859 Invalid, 48 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:46:15,276 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10978 states.
[2023-11-28 23:46:15,337 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10978 to 6198.
[2023-11-28 23:46:15,342 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6198 states, 6197 states have (on average 1.6559625625302565) internal successors, (10262), 6197 states have internal predecessors, (10262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:15,350 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 10262 transitions.
[2023-11-28 23:46:15,350 INFO  L78                 Accepts]: Start accepts. Automaton has 6198 states and 10262 transitions. Word has length 4056
[2023-11-28 23:46:15,352 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:46:15,352 INFO  L495      AbstractCegarLoop]: Abstraction has 6198 states and 10262 transitions.
[2023-11-28 23:46:15,353 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 513.8571428571429) internal successors, (3597), 7 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:15,353 INFO  L276                IsEmpty]: Start isEmpty. Operand 6198 states and 10262 transitions.
[2023-11-28 23:46:15,432 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4058
[2023-11-28 23:46:15,432 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:46:15,433 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:46:15,482 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0
[2023-11-28 23:46:15,633 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48
[2023-11-28 23:46:15,634 INFO  L420      AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:46:15,634 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:46:15,635 INFO  L85        PathProgramCache]: Analyzing trace with hash -1871512798, now seen corresponding path program 1 times
[2023-11-28 23:46:15,635 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:46:15,635 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413125422]
[2023-11-28 23:46:15,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:15,635 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:46:15,960 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:46:15,960 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976816663]
[2023-11-28 23:46:15,961 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:46:15,961 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:46:15,961 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:46:15,962 INFO  L229       MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:46:15,963 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process
[2023-11-28 23:46:19,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:46:19,877 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17516 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:46:19,923 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:46:20,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked.
[2023-11-28 23:46:20,154 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:46:20,154 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:46:20,154 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413125422]
[2023-11-28 23:46:20,154 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:46:20,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976816663]
[2023-11-28 23:46:20,155 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [976816663] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:46:20,155 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:46:20,156 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:46:20,156 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591257408]
[2023-11-28 23:46:20,157 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:46:20,158 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:46:20,159 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:46:20,160 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:46:20,160 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:46:20,161 INFO  L87              Difference]: Start difference. First operand 6198 states and 10262 transitions. Second operand  has 7 states, 7 states have (on average 514.5714285714286) internal successors, (3602), 7 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:46:20,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:46:20,493 INFO  L93              Difference]: Finished difference Result 16238 states and 26861 transitions.
[2023-11-28 23:46:20,493 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-28 23:46:20,494 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 514.5714285714286) internal successors, (3602), 7 states have internal predecessors, (3602), 0 states have call successors, (0), 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 4057
[2023-11-28 23:46:20,497 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:46:20,505 INFO  L225             Difference]: With dead ends: 16238
[2023-11-28 23:46:20,505 INFO  L226             Difference]: Without dead ends: 10982
[2023-11-28 23:46:20,509 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4066 GetRequests, 4054 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:46:20,510 INFO  L413           NwaCegarLoop]: 9595 mSDtfsCounter, 22943 mSDsluCounter, 37224 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22943 SdHoareTripleChecker+Valid, 46819 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time



WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED.



[2023-11-28 23:50:55,125 INFO  L420      AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:50:55,125 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:50:55,126 INFO  L85        PathProgramCache]: Analyzing trace with hash 81097342, now seen corresponding path program 1 times
[2023-11-28 23:50:55,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:50:55,126 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396619372]
[2023-11-28 23:50:55,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:50:55,126 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:50:55,426 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:50:55,427 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677022785]
[2023-11-28 23:50:55,427 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:50:55,427 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:50:55,428 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:50:55,428 INFO  L229       MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:50:55,429 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process
[2023-11-28 23:50:59,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:50:59,376 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17690 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:50:59,422 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:50:59,638 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked.
[2023-11-28 23:50:59,638 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:50:59,638 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:50:59,638 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396619372]
[2023-11-28 23:50:59,638 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:50:59,638 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677022785]
[2023-11-28 23:50:59,638 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677022785] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:50:59,638 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:50:59,639 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:50:59,639 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533201026]
[2023-11-28 23:50:59,639 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:50:59,641 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:50:59,641 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:50:59,643 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:50:59,643 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:50:59,644 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 468.625) internal successors, (3749), 8 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:00,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:00,019 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:00,019 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:00,020 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 468.625) internal successors, (3749), 8 states have internal predecessors, (3749), 0 states have call successors, (0), 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 4110
[2023-11-28 23:51:00,023 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:00,031 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:00,031 INFO  L226             Difference]: Without dead ends: 11224
[2023-11-28 23:51:00,035 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4118 GetRequests, 4106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:51:00,035 INFO  L413           NwaCegarLoop]: 9451 mSDtfsCounter, 22990 mSDsluCounter, 44630 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22990 SdHoareTripleChecker+Valid, 54081 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:00,035 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22990 Valid, 54081 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:00,044 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11224 states.
[2023-11-28 23:51:00,103 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11224 to 6367.
[2023-11-28 23:51:00,108 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:00,116 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:00,117 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4110
[2023-11-28 23:51:00,119 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:00,119 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:00,119 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 468.625) internal successors, (3749), 8 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:00,120 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:00,232 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4112
[2023-11-28 23:51:00,233 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:00,233 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:00,279 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0
[2023-11-28 23:51:00,434 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102
[2023-11-28 23:51:00,434 INFO  L420      AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:00,435 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:00,435 INFO  L85        PathProgramCache]: Analyzing trace with hash 1226461018, now seen corresponding path program 1 times
[2023-11-28 23:51:00,436 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:00,436 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557501900]
[2023-11-28 23:51:00,436 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:00,436 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:00,750 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:00,750 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622292854]
[2023-11-28 23:51:00,751 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:00,751 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:00,751 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:00,752 INFO  L229       MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:00,752 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process
[2023-11-28 23:51:04,655 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:04,766 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17693 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:51:04,815 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:05,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked.
[2023-11-28 23:51:05,029 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:05,029 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:05,029 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557501900]
[2023-11-28 23:51:05,029 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:05,029 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622292854]
[2023-11-28 23:51:05,029 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622292854] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:05,029 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:05,031 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:51:05,031 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955331966]
[2023-11-28 23:51:05,031 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:05,033 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:51:05,033 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:05,034 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:51:05,035 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:51:05,035 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 535.4285714285714) internal successors, (3748), 7 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:05,369 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:05,369 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:05,369 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:05,370 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 535.4285714285714) internal successors, (3748), 7 states have internal predecessors, (3748), 0 states have call successors, (0), 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 4111
[2023-11-28 23:51:05,373 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:05,381 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:05,381 INFO  L226             Difference]: Without dead ends: 11230
[2023-11-28 23:51:05,385 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4119 GetRequests, 4108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:51:05,385 INFO  L413           NwaCegarLoop]: 9461 mSDtfsCounter, 22986 mSDsluCounter, 36820 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22986 SdHoareTripleChecker+Valid, 46281 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:05,385 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22986 Valid, 46281 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:05,394 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11230 states.
[2023-11-28 23:51:05,457 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11230 to 6367.
[2023-11-28 23:51:05,462 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:05,470 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:05,470 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4111
[2023-11-28 23:51:05,473 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:05,473 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:05,473 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 535.4285714285714) internal successors, (3748), 7 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:05,474 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:05,548 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4113
[2023-11-28 23:51:05,548 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:05,549 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:05,598 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0
[2023-11-28 23:51:05,749 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103
[2023-11-28 23:51:05,749 INFO  L420      AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:05,750 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:05,750 INFO  L85        PathProgramCache]: Analyzing trace with hash 567389692, now seen corresponding path program 1 times
[2023-11-28 23:51:05,750 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:05,750 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266936502]
[2023-11-28 23:51:05,751 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:05,751 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:06,069 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:06,069 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982330297]
[2023-11-28 23:51:06,070 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:06,070 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:06,070 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:06,071 INFO  L229       MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:06,072 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process
[2023-11-28 23:51:09,784 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:09,895 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17697 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:51:09,943 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:10,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked.
[2023-11-28 23:51:10,182 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:10,182 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:10,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266936502]
[2023-11-28 23:51:10,182 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:10,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982330297]
[2023-11-28 23:51:10,182 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [982330297] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:10,182 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:10,184 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:51:10,184 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899947501]
[2023-11-28 23:51:10,184 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:10,186 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:51:10,186 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:10,188 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:51:10,188 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:51:10,189 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 468.375) internal successors, (3747), 8 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:10,564 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:10,564 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:10,564 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:10,565 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 468.375) internal successors, (3747), 8 states have internal predecessors, (3747), 0 states have call successors, (0), 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 4112
[2023-11-28 23:51:10,567 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:10,575 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:10,575 INFO  L226             Difference]: Without dead ends: 11236
[2023-11-28 23:51:10,579 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4120 GetRequests, 4108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:51:10,580 INFO  L413           NwaCegarLoop]: 9471 mSDtfsCounter, 22982 mSDsluCounter, 44696 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22982 SdHoareTripleChecker+Valid, 54167 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:10,580 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22982 Valid, 54167 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:10,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11236 states.
[2023-11-28 23:51:10,650 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11236 to 6367.
[2023-11-28 23:51:10,655 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:10,663 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:10,663 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4112
[2023-11-28 23:51:10,665 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:10,666 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:10,666 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 468.375) internal successors, (3747), 8 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:10,666 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:10,744 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4114
[2023-11-28 23:51:10,744 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:10,745 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:10,795 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0
[2023-11-28 23:51:10,946 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104
[2023-11-28 23:51:10,946 INFO  L420      AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:10,946 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:10,947 INFO  L85        PathProgramCache]: Analyzing trace with hash 1919445916, now seen corresponding path program 1 times
[2023-11-28 23:51:10,947 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:10,947 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61934134]
[2023-11-28 23:51:10,947 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:10,947 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:11,271 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:11,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942023229]
[2023-11-28 23:51:11,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:11,272 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:11,272 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:11,272 INFO  L229       MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:11,275 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process
[2023-11-28 23:51:15,130 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:15,241 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17700 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:51:15,290 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:15,502 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked.
[2023-11-28 23:51:15,502 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:15,503 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:15,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61934134]
[2023-11-28 23:51:15,503 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:15,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942023229]
[2023-11-28 23:51:15,503 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [942023229] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:15,503 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:15,505 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:51:15,505 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345414937]
[2023-11-28 23:51:15,505 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:15,507 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:51:15,507 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:15,508 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:51:15,508 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:51:15,509 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 468.25) internal successors, (3746), 8 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:15,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:15,868 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:15,868 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:15,869 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 468.25) internal successors, (3746), 8 states have internal predecessors, (3746), 0 states have call successors, (0), 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 4113
[2023-11-28 23:51:15,872 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:15,881 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:15,881 INFO  L226             Difference]: Without dead ends: 11242
[2023-11-28 23:51:15,886 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4121 GetRequests, 4109 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:51:15,886 INFO  L413           NwaCegarLoop]: 9481 mSDtfsCounter, 22978 mSDsluCounter, 44729 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22978 SdHoareTripleChecker+Valid, 54210 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:15,886 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22978 Valid, 54210 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:15,895 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11242 states.
[2023-11-28 23:51:15,961 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 6367.
[2023-11-28 23:51:15,966 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:15,974 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:15,974 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4113
[2023-11-28 23:51:15,976 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:15,976 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:15,977 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 468.25) internal successors, (3746), 8 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:15,977 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:16,055 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4115
[2023-11-28 23:51:16,055 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:16,056 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:16,106 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0
[2023-11-28 23:51:16,257 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105
[2023-11-28 23:51:16,257 INFO  L420      AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:16,257 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:16,258 INFO  L85        PathProgramCache]: Analyzing trace with hash -384546950, now seen corresponding path program 1 times
[2023-11-28 23:51:16,258 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:16,258 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141056461]
[2023-11-28 23:51:16,258 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:16,258 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:16,559 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:16,560 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315588471]
[2023-11-28 23:51:16,560 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:16,560 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:16,560 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:16,561 INFO  L229       MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:16,562 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process
[2023-11-28 23:51:20,330 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:20,443 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17704 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:51:20,493 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:20,730 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked.
[2023-11-28 23:51:20,730 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:20,730 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:20,730 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141056461]
[2023-11-28 23:51:20,730 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:20,730 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315588471]
[2023-11-28 23:51:20,730 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [315588471] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:20,730 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:20,732 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:51:20,732 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122958102]
[2023-11-28 23:51:20,732 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:20,734 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:51:20,734 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:20,736 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:51:20,736 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:51:20,737 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 534.8571428571429) internal successors, (3744), 7 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:21,088 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:21,088 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:21,089 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:21,090 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 534.8571428571429) internal successors, (3744), 7 states have internal predecessors, (3744), 0 states have call successors, (0), 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 4114
[2023-11-28 23:51:21,092 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:21,102 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:21,102 INFO  L226             Difference]: Without dead ends: 11251
[2023-11-28 23:51:21,106 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4122 GetRequests, 4111 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:51:21,107 INFO  L413           NwaCegarLoop]: 9496 mSDtfsCounter, 22975 mSDsluCounter, 36925 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22975 SdHoareTripleChecker+Valid, 46421 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:21,107 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22975 Valid, 46421 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:21,116 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11251 states.
[2023-11-28 23:51:21,180 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11251 to 6367.
[2023-11-28 23:51:21,186 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:21,194 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:21,194 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4114
[2023-11-28 23:51:21,196 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:21,196 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:21,197 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 534.8571428571429) internal successors, (3744), 7 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:21,197 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:21,278 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4116
[2023-11-28 23:51:21,278 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:21,279 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:21,329 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0
[2023-11-28 23:51:21,480 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106
[2023-11-28 23:51:21,480 INFO  L420      AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:21,480 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:21,481 INFO  L85        PathProgramCache]: Analyzing trace with hash -866708424, now seen corresponding path program 1 times
[2023-11-28 23:51:21,481 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:21,481 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921265312]
[2023-11-28 23:51:21,482 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:21,482 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:21,801 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:21,801 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878670365]
[2023-11-28 23:51:21,802 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:21,802 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:21,802 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:21,803 INFO  L229       MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:21,804 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process
[2023-11-28 23:51:25,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:25,708 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17707 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:51:25,755 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:25,980 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked.
[2023-11-28 23:51:25,980 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:25,980 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:25,980 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921265312]
[2023-11-28 23:51:25,980 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:25,980 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878670365]
[2023-11-28 23:51:25,980 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878670365] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:25,980 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:25,982 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:51:25,982 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127827527]
[2023-11-28 23:51:25,982 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:25,984 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:51:25,984 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:25,985 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:51:25,985 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:51:25,986 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 467.875) internal successors, (3743), 8 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:26,379 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:26,379 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:26,379 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:26,380 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 467.875) internal successors, (3743), 8 states have internal predecessors, (3743), 0 states have call successors, (0), 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 4115
[2023-11-28 23:51:26,383 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:26,394 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:26,394 INFO  L226             Difference]: Without dead ends: 11257
[2023-11-28 23:51:26,399 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4123 GetRequests, 4111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:51:26,399 INFO  L413           NwaCegarLoop]: 9506 mSDtfsCounter, 22971 mSDsluCounter, 44813 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22971 SdHoareTripleChecker+Valid, 54319 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:26,399 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22971 Valid, 54319 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:26,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11257 states.
[2023-11-28 23:51:26,475 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 6367.
[2023-11-28 23:51:26,480 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:26,488 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:26,488 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4115
[2023-11-28 23:51:26,490 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:26,490 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:26,491 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 467.875) internal successors, (3743), 8 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:26,491 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:26,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4117
[2023-11-28 23:51:26,570 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:26,571 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:26,620 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0
[2023-11-28 23:51:26,771 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107
[2023-11-28 23:51:26,772 INFO  L420      AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:26,772 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:26,772 INFO  L85        PathProgramCache]: Analyzing trace with hash -1098375242, now seen corresponding path program 1 times
[2023-11-28 23:51:26,773 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:26,773 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941031947]
[2023-11-28 23:51:26,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:26,773 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:27,087 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:27,087 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617795848]
[2023-11-28 23:51:27,088 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:27,088 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:27,088 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:27,089 INFO  L229       MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:27,090 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process
[2023-11-28 23:51:30,988 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:31,096 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17710 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:51:31,145 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:31,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked.
[2023-11-28 23:51:31,405 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:31,405 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:31,405 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941031947]
[2023-11-28 23:51:31,405 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:31,405 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617795848]
[2023-11-28 23:51:31,405 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617795848] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:31,405 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:31,406 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:51:31,406 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253345413]
[2023-11-28 23:51:31,407 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:31,408 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:51:31,408 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:31,410 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:51:31,410 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:51:31,411 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 534.5714285714286) internal successors, (3742), 7 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:31,757 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:31,757 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:31,757 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:31,758 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 534.5714285714286) internal successors, (3742), 7 states have internal predecessors, (3742), 0 states have call successors, (0), 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 4116
[2023-11-28 23:51:31,761 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:31,771 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:31,771 INFO  L226             Difference]: Without dead ends: 11263
[2023-11-28 23:51:31,775 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4124 GetRequests, 4113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:51:31,776 INFO  L413           NwaCegarLoop]: 9516 mSDtfsCounter, 22967 mSDsluCounter, 36985 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22967 SdHoareTripleChecker+Valid, 46501 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:31,776 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22967 Valid, 46501 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:31,787 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11263 states.
[2023-11-28 23:51:31,849 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11263 to 6367.
[2023-11-28 23:51:31,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:31,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:31,862 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4116
[2023-11-28 23:51:31,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:31,864 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:31,865 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 534.5714285714286) internal successors, (3742), 7 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:31,865 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:31,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4118
[2023-11-28 23:51:31,939 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:31,940 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:31,988 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0
[2023-11-28 23:51:32,140 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:32,141 INFO  L420      AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:32,141 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:32,141 INFO  L85        PathProgramCache]: Analyzing trace with hash -1571922504, now seen corresponding path program 1 times
[2023-11-28 23:51:32,141 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:32,141 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324430948]
[2023-11-28 23:51:32,142 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:32,143 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:32,448 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:32,448 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919763027]
[2023-11-28 23:51:32,449 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:32,449 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:32,449 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:32,450 INFO  L229       MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:32,451 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process
[2023-11-28 23:51:36,168 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:36,276 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17713 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:51:36,324 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:36,549 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked.
[2023-11-28 23:51:36,549 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:36,550 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:36,550 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324430948]
[2023-11-28 23:51:36,550 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:36,550 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919763027]
[2023-11-28 23:51:36,550 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919763027] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:36,550 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:36,551 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:51:36,552 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56488643]
[2023-11-28 23:51:36,552 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:36,554 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:51:36,554 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:36,556 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:51:36,556 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:51:36,557 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 467.625) internal successors, (3741), 8 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:36,952 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:36,952 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:36,952 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:36,953 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 467.625) internal successors, (3741), 8 states have internal predecessors, (3741), 0 states have call successors, (0), 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 4117
[2023-11-28 23:51:36,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:36,965 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:36,965 INFO  L226             Difference]: Without dead ends: 11269
[2023-11-28 23:51:36,969 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4125 GetRequests, 4113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:51:36,970 INFO  L413           NwaCegarLoop]: 9526 mSDtfsCounter, 22963 mSDsluCounter, 46532 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22963 SdHoareTripleChecker+Valid, 56058 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:36,970 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22963 Valid, 56058 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:36,979 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11269 states.
[2023-11-28 23:51:37,044 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 6367.
[2023-11-28 23:51:37,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:37,058 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:37,058 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4117
[2023-11-28 23:51:37,060 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:37,060 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:37,061 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 467.625) internal successors, (3741), 8 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:37,061 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:37,142 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4119
[2023-11-28 23:51:37,142 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:37,143 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:51:37,192 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0
[2023-11-28 23:51:37,343 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:37,344 INFO  L420      AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:37,344 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:37,344 INFO  L85        PathProgramCache]: Analyzing trace with hash 1596803954, now seen corresponding path program 1 times
[2023-11-28 23:51:37,344 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:37,344 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732312760]
[2023-11-28 23:51:37,345 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:37,345 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:37,651 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:37,651 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690705116]
[2023-11-28 23:51:37,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:37,652 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:37,652 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:37,653 INFO  L229       MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:37,654 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process
[2023-11-28 23:51:41,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:41,535 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17716 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:51:41,583 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:41,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked.
[2023-11-28 23:51:41,825 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:41,825 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:41,825 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732312760]
[2023-11-28 23:51:41,825 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:41,825 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690705116]
[2023-11-28 23:51:41,825 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [690705116] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:41,825 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:41,826 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:51:41,826 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762847525]
[2023-11-28 23:51:41,826 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:41,828 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:51:41,828 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:41,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:51:41,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:51:41,831 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 534.2857142857143) internal successors, (3740), 7 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:42,184 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:42,184 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:42,184 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:42,185 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 534.2857142857143) internal successors, (3740), 7 states have internal predecessors, (3740), 0 states have call successors, (0), 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 4118
[2023-11-28 23:51:42,188 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:42,197 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:42,197 INFO  L226             Difference]: Without dead ends: 11275
[2023-11-28 23:51:42,201 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4126 GetRequests, 4115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:51:42,201 INFO  L413           NwaCegarLoop]: 9536 mSDtfsCounter, 22959 mSDsluCounter, 37045 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22959 SdHoareTripleChecker+Valid, 46581 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:42,202 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22959 Valid, 46581 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:42,210 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11275 states.
[2023-11-28 23:51:42,275 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 6367.
[2023-11-28 23:51:42,280 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:42,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:42,288 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4118
[2023-11-28 23:51:42,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:42,290 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:42,291 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 534.2857142857143) internal successors, (3740), 7 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:42,291 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:42,369 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4120
[2023-11-28 23:51:42,369 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:42,370 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:42,419 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0
[2023-11-28 23:51:42,570 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:42,571 INFO  L420      AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:42,571 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:42,571 INFO  L85        PathProgramCache]: Analyzing trace with hash -1527570760, now seen corresponding path program 1 times
[2023-11-28 23:51:42,571 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:42,571 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500697854]
[2023-11-28 23:51:42,573 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:42,573 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:42,892 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:42,892 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870229945]
[2023-11-28 23:51:42,893 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:42,893 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:42,893 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:42,894 INFO  L229       MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:42,895 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process
[2023-11-28 23:51:46,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:46,816 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17719 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:51:46,863 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:47,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked.
[2023-11-28 23:51:47,077 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:47,077 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:47,077 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500697854]
[2023-11-28 23:51:47,077 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:47,078 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870229945]
[2023-11-28 23:51:47,078 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870229945] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:47,078 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:47,079 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:51:47,079 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951822725]
[2023-11-28 23:51:47,079 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:47,081 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:51:47,081 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:47,083 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:51:47,083 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:51:47,084 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 534.1428571428571) internal successors, (3739), 7 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:47,461 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:47,461 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:47,461 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:47,462 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 534.1428571428571) internal successors, (3739), 7 states have internal predecessors, (3739), 0 states have call successors, (0), 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 4119
[2023-11-28 23:51:47,465 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:47,474 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:47,474 INFO  L226             Difference]: Without dead ends: 11281
[2023-11-28 23:51:47,478 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4127 GetRequests, 4116 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:51:47,479 INFO  L413           NwaCegarLoop]: 9546 mSDtfsCounter, 22955 mSDsluCounter, 37075 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22955 SdHoareTripleChecker+Valid, 46621 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:47,479 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22955 Valid, 46621 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:47,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11281 states.
[2023-11-28 23:51:47,554 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11281 to 6367.
[2023-11-28 23:51:47,559 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:47,567 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:47,567 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4119
[2023-11-28 23:51:47,570 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:47,570 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:47,570 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 534.1428571428571) internal successors, (3739), 7 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:47,570 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:47,652 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4121
[2023-11-28 23:51:47,653 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:47,653 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:47,703 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0
[2023-11-28 23:51:47,854 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:47,854 INFO  L420      AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:47,854 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:47,855 INFO  L85        PathProgramCache]: Analyzing trace with hash 829557422, now seen corresponding path program 1 times
[2023-11-28 23:51:47,855 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:47,855 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056452015]
[2023-11-28 23:51:47,855 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:47,855 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:48,216 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:48,216 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830367516]
[2023-11-28 23:51:48,217 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:48,217 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:48,217 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:48,218 INFO  L229       MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:48,218 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process
[2023-11-28 23:51:52,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:52,154 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17722 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:51:52,201 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:52,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked.
[2023-11-28 23:51:52,418 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:52,418 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:52,418 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056452015]
[2023-11-28 23:51:52,418 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:52,418 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830367516]
[2023-11-28 23:51:52,418 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830367516] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:52,418 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:52,419 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:51:52,419 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133775454]
[2023-11-28 23:51:52,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:52,421 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:51:52,421 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:52,423 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:51:52,423 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:51:52,424 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 534.0) internal successors, (3738), 7 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:52,816 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:52,817 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:52,817 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:52,818 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 534.0) internal successors, (3738), 7 states have internal predecessors, (3738), 0 states have call successors, (0), 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 4120
[2023-11-28 23:51:52,821 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:52,829 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:52,829 INFO  L226             Difference]: Without dead ends: 11287
[2023-11-28 23:51:52,833 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4128 GetRequests, 4117 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:51:52,833 INFO  L413           NwaCegarLoop]: 9556 mSDtfsCounter, 22951 mSDsluCounter, 37105 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22951 SdHoareTripleChecker+Valid, 46661 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:52,833 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22951 Valid, 46661 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:52,844 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11287 states.
[2023-11-28 23:51:52,902 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11287 to 6367.
[2023-11-28 23:51:52,907 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:52,915 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:52,915 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4120
[2023-11-28 23:51:52,917 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:52,917 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:52,918 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 534.0) internal successors, (3738), 7 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:52,918 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:52,992 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4122
[2023-11-28 23:51:52,992 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:52,993 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:53,042 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0
[2023-11-28 23:51:53,193 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112
[2023-11-28 23:51:53,193 INFO  L420      AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:53,194 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:53,194 INFO  L85        PathProgramCache]: Analyzing trace with hash 88397624, now seen corresponding path program 1 times
[2023-11-28 23:51:53,194 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:53,194 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692377543]
[2023-11-28 23:51:53,195 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:53,195 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:53,567 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:53,567 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788740170]
[2023-11-28 23:51:53,568 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:53,568 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:53,568 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:53,569 INFO  L229       MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:53,570 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process
[2023-11-28 23:51:57,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:51:57,495 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17725 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:51:57,543 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:51:57,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked.
[2023-11-28 23:51:57,863 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:51:57,863 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:51:57,863 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692377543]
[2023-11-28 23:51:57,863 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:51:57,864 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788740170]
[2023-11-28 23:51:57,864 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [788740170] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:51:57,864 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:51:57,865 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:51:57,866 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708352734]
[2023-11-28 23:51:57,866 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:51:57,868 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:51:57,868 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:51:57,870 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:51:57,870 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:51:57,871 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 467.125) internal successors, (3737), 8 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:58,263 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:51:58,263 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:51:58,263 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:51:58,264 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 467.125) internal successors, (3737), 8 states have internal predecessors, (3737), 0 states have call successors, (0), 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 4121
[2023-11-28 23:51:58,267 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:51:58,275 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:51:58,275 INFO  L226             Difference]: Without dead ends: 11293
[2023-11-28 23:51:58,279 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4129 GetRequests, 4117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:51:58,279 INFO  L413           NwaCegarLoop]: 9566 mSDtfsCounter, 22947 mSDsluCounter, 46692 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22947 SdHoareTripleChecker+Valid, 56258 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:51:58,280 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22947 Valid, 56258 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:51:58,289 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11293 states.
[2023-11-28 23:51:58,365 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11293 to 6367.
[2023-11-28 23:51:58,371 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:58,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:51:58,379 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4121
[2023-11-28 23:51:58,381 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:51:58,381 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:51:58,382 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 467.125) internal successors, (3737), 8 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:51:58,382 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:51:58,461 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4123
[2023-11-28 23:51:58,461 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:51:58,462 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:51:58,511 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0
[2023-11-28 23:51:58,662 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:58,663 INFO  L420      AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:51:58,663 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:51:58,663 INFO  L85        PathProgramCache]: Analyzing trace with hash -216228502, now seen corresponding path program 1 times
[2023-11-28 23:51:58,664 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:51:58,664 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138957118]
[2023-11-28 23:51:58,664 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:58,664 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:51:58,985 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:51:58,985 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228828078]
[2023-11-28 23:51:58,986 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:51:58,986 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:51:58,986 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:51:58,987 INFO  L229       MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:51:58,988 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process
[2023-11-28 23:52:02,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:02,916 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17728 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:52:02,965 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:03,191 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked.
[2023-11-28 23:52:03,192 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:03,192 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:03,192 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138957118]
[2023-11-28 23:52:03,192 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:03,192 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228828078]
[2023-11-28 23:52:03,192 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228828078] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:03,192 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:03,194 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:52:03,194 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752941483]
[2023-11-28 23:52:03,194 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:03,196 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:52:03,196 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:03,198 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:52:03,199 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:52:03,199 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 533.7142857142857) internal successors, (3736), 7 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:03,547 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:03,548 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:03,548 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:03,549 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 533.7142857142857) internal successors, (3736), 7 states have internal predecessors, (3736), 0 states have call successors, (0), 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 4122
[2023-11-28 23:52:03,551 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:03,560 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:03,560 INFO  L226             Difference]: Without dead ends: 11299
[2023-11-28 23:52:03,564 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4130 GetRequests, 4119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:52:03,564 INFO  L413           NwaCegarLoop]: 9576 mSDtfsCounter, 22943 mSDsluCounter, 37165 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22943 SdHoareTripleChecker+Valid, 46741 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:03,564 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22943 Valid, 46741 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:03,574 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11299 states.
[2023-11-28 23:52:03,638 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11299 to 6367.
[2023-11-28 23:52:03,644 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:03,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:03,652 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4122
[2023-11-28 23:52:03,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:03,654 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:03,655 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 533.7142857142857) internal successors, (3736), 7 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:03,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:03,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4124
[2023-11-28 23:52:03,734 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:03,735 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:03,785 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0
[2023-11-28 23:52:03,936 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114
[2023-11-28 23:52:03,936 INFO  L420      AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:03,936 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:03,937 INFO  L85        PathProgramCache]: Analyzing trace with hash -2011494600, now seen corresponding path program 1 times
[2023-11-28 23:52:03,937 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:03,937 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39239619]
[2023-11-28 23:52:03,938 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:03,938 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:04,269 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:04,269 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377567886]
[2023-11-28 23:52:04,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:04,270 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:04,270 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:04,271 INFO  L229       MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:04,272 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process
[2023-11-28 23:52:08,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:08,159 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17731 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:52:08,208 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:08,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked.
[2023-11-28 23:52:08,446 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:08,447 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:08,447 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39239619]
[2023-11-28 23:52:08,447 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:08,447 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377567886]
[2023-11-28 23:52:08,447 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [377567886] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:08,447 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:08,449 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:08,449 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268374712]
[2023-11-28 23:52:08,449 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:08,451 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:08,451 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:08,452 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:08,452 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:08,453 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 466.875) internal successors, (3735), 8 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:08,912 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:08,913 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:08,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:08,914 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 466.875) internal successors, (3735), 8 states have internal predecessors, (3735), 0 states have call successors, (0), 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 4123
[2023-11-28 23:52:08,916 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:08,923 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:08,923 INFO  L226             Difference]: Without dead ends: 11305
[2023-11-28 23:52:08,927 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4131 GetRequests, 4119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:08,927 INFO  L413           NwaCegarLoop]: 9586 mSDtfsCounter, 22939 mSDsluCounter, 46772 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22939 SdHoareTripleChecker+Valid, 56358 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:08,927 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22939 Valid, 56358 Invalid, 63 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:08,936 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11305 states.
[2023-11-28 23:52:08,999 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11305 to 6367.
[2023-11-28 23:52:09,004 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:09,012 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:09,012 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4123
[2023-11-28 23:52:09,014 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:09,014 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:09,015 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 466.875) internal successors, (3735), 8 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:09,015 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:09,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4125
[2023-11-28 23:52:09,097 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:09,097 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:09,148 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0
[2023-11-28 23:52:09,298 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:09,298 INFO  L420      AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:09,298 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:09,299 INFO  L85        PathProgramCache]: Analyzing trace with hash 88818598, now seen corresponding path program 1 times
[2023-11-28 23:52:09,299 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:09,299 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611434460]
[2023-11-28 23:52:09,300 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:09,300 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:09,613 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:09,613 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675251625]
[2023-11-28 23:52:09,614 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:09,614 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:09,614 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:09,615 INFO  L229       MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:09,615 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process
[2023-11-28 23:52:13,331 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:13,444 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17734 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:52:13,493 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:13,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked.
[2023-11-28 23:52:13,713 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:13,714 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:13,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611434460]
[2023-11-28 23:52:13,714 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:13,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675251625]
[2023-11-28 23:52:13,714 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675251625] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:13,714 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:13,715 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:52:13,715 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925992743]
[2023-11-28 23:52:13,715 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:13,717 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:52:13,717 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:13,718 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:52:13,718 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:52:13,719 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 533.4285714285714) internal successors, (3734), 7 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:14,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:14,058 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:14,059 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:14,059 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 533.4285714285714) internal successors, (3734), 7 states have internal predecessors, (3734), 0 states have call successors, (0), 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 4124
[2023-11-28 23:52:14,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:14,070 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:14,070 INFO  L226             Difference]: Without dead ends: 11311
[2023-11-28 23:52:14,074 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4132 GetRequests, 4121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:52:14,074 INFO  L413           NwaCegarLoop]: 9596 mSDtfsCounter, 22935 mSDsluCounter, 37225 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22935 SdHoareTripleChecker+Valid, 46821 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:14,074 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22935 Valid, 46821 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:14,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11311 states.
[2023-11-28 23:52:14,145 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 6367.
[2023-11-28 23:52:14,150 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:14,158 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:14,158 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4124
[2023-11-28 23:52:14,160 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:14,160 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:14,161 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 533.4285714285714) internal successors, (3734), 7 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:14,161 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:14,241 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4126
[2023-11-28 23:52:14,241 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:14,242 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:14,292 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0
[2023-11-28 23:52:14,442 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:14,442 INFO  L420      AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:14,443 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:14,443 INFO  L85        PathProgramCache]: Analyzing trace with hash 908406456, now seen corresponding path program 1 times
[2023-11-28 23:52:14,444 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:14,444 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753317664]
[2023-11-28 23:52:14,444 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:14,444 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:14,762 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:14,763 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108266285]
[2023-11-28 23:52:14,763 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:14,764 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:14,764 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:14,764 INFO  L229       MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:14,765 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process
[2023-11-28 23:52:18,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:18,688 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17737 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:52:18,736 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:18,959 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked.
[2023-11-28 23:52:18,959 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:18,959 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:18,959 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753317664]
[2023-11-28 23:52:18,959 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:18,959 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108266285]
[2023-11-28 23:52:18,959 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [108266285] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:18,959 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:18,961 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:18,961 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972294541]
[2023-11-28 23:52:18,961 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:18,963 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:18,964 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:18,965 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:18,965 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:18,966 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 466.5) internal successors, (3732), 8 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:19,367 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:19,367 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:19,367 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:19,368 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 466.5) internal successors, (3732), 8 states have internal predecessors, (3732), 0 states have call successors, (0), 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 4125
[2023-11-28 23:52:19,371 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:19,379 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:19,379 INFO  L226             Difference]: Without dead ends: 11320
[2023-11-28 23:52:19,383 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4133 GetRequests, 4121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:19,384 INFO  L413           NwaCegarLoop]: 9611 mSDtfsCounter, 22932 mSDsluCounter, 46872 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22932 SdHoareTripleChecker+Valid, 56483 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:19,384 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22932 Valid, 56483 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:19,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11320 states.
[2023-11-28 23:52:19,460 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11320 to 6367.
[2023-11-28 23:52:19,466 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:19,473 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:19,474 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4125
[2023-11-28 23:52:19,476 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:19,476 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:19,477 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 466.5) internal successors, (3732), 8 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:19,477 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:19,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4127
[2023-11-28 23:52:19,594 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:19,594 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:19,644 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0
[2023-11-28 23:52:19,795 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:19,795 INFO  L420      AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:19,796 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:19,797 INFO  L85        PathProgramCache]: Analyzing trace with hash 869960764, now seen corresponding path program 1 times
[2023-11-28 23:52:19,797 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:19,797 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949198441]
[2023-11-28 23:52:19,798 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:19,798 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:20,109 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:20,109 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810353357]
[2023-11-28 23:52:20,110 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:20,110 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:20,110 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:20,111 INFO  L229       MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:20,112 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process
[2023-11-28 23:52:23,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:24,039 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17740 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:52:24,098 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:24,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked.
[2023-11-28 23:52:24,316 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:24,316 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:24,316 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949198441]
[2023-11-28 23:52:24,316 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:24,316 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810353357]
[2023-11-28 23:52:24,316 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [810353357] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:24,316 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:24,318 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:24,318 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948410163]
[2023-11-28 23:52:24,318 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:24,320 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:24,320 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:24,322 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:24,322 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:24,323 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 466.375) internal successors, (3731), 8 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:24,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:24,730 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:24,730 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:24,731 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 466.375) internal successors, (3731), 8 states have internal predecessors, (3731), 0 states have call successors, (0), 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 4126
[2023-11-28 23:52:24,734 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:24,743 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:24,743 INFO  L226             Difference]: Without dead ends: 11326
[2023-11-28 23:52:24,747 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4134 GetRequests, 4122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:24,748 INFO  L413           NwaCegarLoop]: 9621 mSDtfsCounter, 22928 mSDsluCounter, 46912 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22928 SdHoareTripleChecker+Valid, 56533 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:24,748 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22928 Valid, 56533 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:24,757 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11326 states.
[2023-11-28 23:52:24,823 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 6367.
[2023-11-28 23:52:24,828 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:24,838 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:24,838 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4126
[2023-11-28 23:52:24,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:24,840 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:24,841 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 466.375) internal successors, (3731), 8 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:24,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:24,924 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4128
[2023-11-28 23:52:24,924 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:24,925 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:24,974 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0
[2023-11-28 23:52:25,125 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:25,125 INFO  L420      AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:25,126 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:25,126 INFO  L85        PathProgramCache]: Analyzing trace with hash 109910906, now seen corresponding path program 1 times
[2023-11-28 23:52:25,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:25,126 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468204844]
[2023-11-28 23:52:25,127 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:25,127 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:25,448 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:25,448 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680548722]
[2023-11-28 23:52:25,449 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:25,449 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:25,449 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:25,450 INFO  L229       MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:25,451 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process
[2023-11-28 23:52:29,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:29,262 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17744 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:52:29,313 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:29,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked.
[2023-11-28 23:52:29,556 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:29,556 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:29,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468204844]
[2023-11-28 23:52:29,556 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:29,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680548722]
[2023-11-28 23:52:29,556 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680548722] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:29,556 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:29,558 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:29,558 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471820184]
[2023-11-28 23:52:29,558 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:29,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:29,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:29,562 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:29,562 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:29,562 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 466.25) internal successors, (3730), 8 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:29,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:29,983 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:29,983 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:29,984 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 466.25) internal successors, (3730), 8 states have internal predecessors, (3730), 0 states have call successors, (0), 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 4127
[2023-11-28 23:52:29,987 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:29,994 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:29,994 INFO  L226             Difference]: Without dead ends: 11332
[2023-11-28 23:52:29,998 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4135 GetRequests, 4123 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:29,999 INFO  L413           NwaCegarLoop]: 9631 mSDtfsCounter, 22924 mSDsluCounter, 45227 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22924 SdHoareTripleChecker+Valid, 54858 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:29,999 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22924 Valid, 54858 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:30,008 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11332 states.
[2023-11-28 23:52:30,081 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11332 to 6367.
[2023-11-28 23:52:30,088 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:30,099 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:30,099 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4127
[2023-11-28 23:52:30,101 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:30,101 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:30,102 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 466.25) internal successors, (3730), 8 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:30,102 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:30,223 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4129
[2023-11-28 23:52:30,223 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:30,224 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:52:30,275 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0
[2023-11-28 23:52:30,425 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:30,425 INFO  L420      AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:30,426 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:30,427 INFO  L85        PathProgramCache]: Analyzing trace with hash 1906331578, now seen corresponding path program 1 times
[2023-11-28 23:52:30,427 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:30,427 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791482411]
[2023-11-28 23:52:30,427 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:30,427 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:30,745 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:30,745 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253389571]
[2023-11-28 23:52:30,746 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:30,746 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:30,746 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:30,747 INFO  L229       MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:30,747 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process
[2023-11-28 23:52:34,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:34,563 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17747 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:52:34,610 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:34,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked.
[2023-11-28 23:52:34,813 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:34,813 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:34,813 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791482411]
[2023-11-28 23:52:34,813 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:34,813 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253389571]
[2023-11-28 23:52:34,813 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253389571] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:34,813 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:34,815 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:52:34,815 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376085163]
[2023-11-28 23:52:34,815 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:34,817 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:52:34,817 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:34,819 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:52:34,819 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:52:34,820 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 532.7142857142857) internal successors, (3729), 7 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:35,161 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:35,161 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:35,162 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:35,163 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 532.7142857142857) internal successors, (3729), 7 states have internal predecessors, (3729), 0 states have call successors, (0), 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 4128
[2023-11-28 23:52:35,165 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:35,173 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:35,174 INFO  L226             Difference]: Without dead ends: 11338
[2023-11-28 23:52:35,178 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4136 GetRequests, 4125 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:52:35,178 INFO  L413           NwaCegarLoop]: 9641 mSDtfsCounter, 22920 mSDsluCounter, 37360 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22920 SdHoareTripleChecker+Valid, 47001 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:35,178 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22920 Valid, 47001 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:35,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11338 states.
[2023-11-28 23:52:35,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11338 to 6367.
[2023-11-28 23:52:35,256 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:35,264 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:35,264 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4128
[2023-11-28 23:52:35,267 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:35,267 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:35,267 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 532.7142857142857) internal successors, (3729), 7 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:35,268 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:35,345 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4130
[2023-11-28 23:52:35,345 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:35,346 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:35,396 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0
[2023-11-28 23:52:35,546 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:35,547 INFO  L420      AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:35,547 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:35,547 INFO  L85        PathProgramCache]: Analyzing trace with hash -478156228, now seen corresponding path program 1 times
[2023-11-28 23:52:35,548 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:35,548 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132272559]
[2023-11-28 23:52:35,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:35,548 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:35,860 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:35,860 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184712627]
[2023-11-28 23:52:35,861 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:35,861 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:35,861 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:35,862 INFO  L229       MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:35,863 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process
[2023-11-28 23:52:39,680 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:39,788 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17751 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:52:39,836 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:40,063 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2023-11-28 23:52:40,063 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:40,063 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:40,063 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132272559]
[2023-11-28 23:52:40,063 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:40,063 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184712627]
[2023-11-28 23:52:40,064 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [184712627] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:40,064 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:40,065 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:40,065 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874687811]
[2023-11-28 23:52:40,065 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:40,068 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:40,068 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:40,069 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:40,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:40,070 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 466.0) internal successors, (3728), 8 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:40,462 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:40,462 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:40,462 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:40,463 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 466.0) internal successors, (3728), 8 states have internal predecessors, (3728), 0 states have call successors, (0), 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 4129
[2023-11-28 23:52:40,466 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:40,473 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:40,473 INFO  L226             Difference]: Without dead ends: 11344
[2023-11-28 23:52:40,477 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4137 GetRequests, 4125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:40,478 INFO  L413           NwaCegarLoop]: 9651 mSDtfsCounter, 22916 mSDsluCounter, 47032 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22916 SdHoareTripleChecker+Valid, 56683 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:40,478 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22916 Valid, 56683 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:40,486 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11344 states.
[2023-11-28 23:52:40,549 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 6367.
[2023-11-28 23:52:40,554 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:40,563 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:40,563 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4129
[2023-11-28 23:52:40,565 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:40,565 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:40,566 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 466.0) internal successors, (3728), 8 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:40,566 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:40,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4131
[2023-11-28 23:52:40,644 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:40,645 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:40,695 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0
[2023-11-28 23:52:40,845 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121
[2023-11-28 23:52:40,845 INFO  L420      AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:40,846 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:40,847 INFO  L85        PathProgramCache]: Analyzing trace with hash -722112200, now seen corresponding path program 1 times
[2023-11-28 23:52:40,847 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:40,847 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205043219]
[2023-11-28 23:52:40,848 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:40,848 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:41,183 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:41,183 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832413578]
[2023-11-28 23:52:41,184 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:41,184 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:41,184 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:41,185 INFO  L229       MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:41,186 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process
[2023-11-28 23:52:44,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:45,068 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17754 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:52:45,117 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:45,349 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked.
[2023-11-28 23:52:45,349 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:45,349 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:45,349 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205043219]
[2023-11-28 23:52:45,349 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:45,349 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832413578]
[2023-11-28 23:52:45,349 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832413578] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:45,349 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:45,351 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:45,351 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24597526]
[2023-11-28 23:52:45,351 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:45,353 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:45,353 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:45,355 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:45,355 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:45,355 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.875) internal successors, (3727), 8 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:45,734 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:45,735 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:45,735 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:45,736 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.875) internal successors, (3727), 8 states have internal predecessors, (3727), 0 states have call successors, (0), 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 4130
[2023-11-28 23:52:45,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:45,747 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:45,747 INFO  L226             Difference]: Without dead ends: 11350
[2023-11-28 23:52:45,751 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4138 GetRequests, 4126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:45,752 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 22912 mSDsluCounter, 45326 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22912 SdHoareTripleChecker+Valid, 54987 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:45,752 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22912 Valid, 54987 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:45,761 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11350 states.
[2023-11-28 23:52:45,827 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11350 to 6367.
[2023-11-28 23:52:45,832 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:45,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:45,840 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4130
[2023-11-28 23:52:45,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:45,843 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:45,844 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.875) internal successors, (3727), 8 states have internal predecessors, (3727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:45,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:45,925 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4132
[2023-11-28 23:52:45,925 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:45,926 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:45,977 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0
[2023-11-28 23:52:46,126 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122
[2023-11-28 23:52:46,127 INFO  L420      AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:46,127 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:46,128 INFO  L85        PathProgramCache]: Analyzing trace with hash 1973435134, now seen corresponding path program 1 times
[2023-11-28 23:52:46,128 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:46,128 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883463470]
[2023-11-28 23:52:46,129 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:46,129 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:46,446 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:46,446 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351868076]
[2023-11-28 23:52:46,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:46,447 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:46,447 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:46,448 INFO  L229       MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:46,449 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process
[2023-11-28 23:52:50,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:50,436 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17758 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:52:50,485 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:50,720 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked.
[2023-11-28 23:52:50,720 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:50,720 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:50,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883463470]
[2023-11-28 23:52:50,721 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:50,721 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351868076]
[2023-11-28 23:52:50,721 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [351868076] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:50,721 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:50,722 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:50,722 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717327590]
[2023-11-28 23:52:50,723 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:50,725 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:50,725 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:50,726 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:50,727 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:50,727 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.75) internal successors, (3726), 8 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:51,141 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:51,141 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:51,142 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:51,143 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.75) internal successors, (3726), 8 states have internal predecessors, (3726), 0 states have call successors, (0), 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 4131
[2023-11-28 23:52:51,146 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:51,153 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:51,153 INFO  L226             Difference]: Without dead ends: 11356
[2023-11-28 23:52:51,157 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4139 GetRequests, 4127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:51,158 INFO  L413           NwaCegarLoop]: 9671 mSDtfsCounter, 22908 mSDsluCounter, 47112 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22908 SdHoareTripleChecker+Valid, 56783 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:51,158 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22908 Valid, 56783 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:51,166 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11356 states.
[2023-11-28 23:52:51,230 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11356 to 6367.
[2023-11-28 23:52:51,235 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:51,243 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:51,243 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4131
[2023-11-28 23:52:51,245 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:51,245 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:51,246 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.75) internal successors, (3726), 8 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:51,246 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:51,323 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4133
[2023-11-28 23:52:51,323 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:51,324 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:51,372 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0
[2023-11-28 23:52:51,524 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123
[2023-11-28 23:52:51,524 INFO  L420      AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:51,525 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:51,525 INFO  L85        PathProgramCache]: Analyzing trace with hash -16035658, now seen corresponding path program 1 times
[2023-11-28 23:52:51,525 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:51,525 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899592768]
[2023-11-28 23:52:51,526 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:51,526 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:51,973 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:51,973 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978621941]
[2023-11-28 23:52:51,975 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:51,975 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:51,975 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:51,976 INFO  L229       MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:51,977 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process
[2023-11-28 23:52:55,698 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:52:55,807 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17761 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:52:55,854 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:52:56,093 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked.
[2023-11-28 23:52:56,093 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:52:56,093 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:52:56,094 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899592768]
[2023-11-28 23:52:56,094 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:52:56,094 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978621941]
[2023-11-28 23:52:56,094 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [978621941] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:52:56,094 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:52:56,095 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:52:56,095 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682749756]
[2023-11-28 23:52:56,096 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:52:56,097 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:52:56,097 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:52:56,099 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:52:56,099 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:52:56,100 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.625) internal successors, (3725), 8 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:56,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:52:56,496 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:52:56,496 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:52:56,497 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.625) internal successors, (3725), 8 states have internal predecessors, (3725), 0 states have call successors, (0), 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 4132
[2023-11-28 23:52:56,500 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:52:56,508 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:52:56,508 INFO  L226             Difference]: Without dead ends: 11362
[2023-11-28 23:52:56,512 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4140 GetRequests, 4128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:52:56,512 INFO  L413           NwaCegarLoop]: 9681 mSDtfsCounter, 22904 mSDsluCounter, 47152 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22904 SdHoareTripleChecker+Valid, 56833 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:52:56,512 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22904 Valid, 56833 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:52:56,522 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11362 states.
[2023-11-28 23:52:56,587 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 6367.
[2023-11-28 23:52:56,592 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:56,600 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:52:56,600 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4132
[2023-11-28 23:52:56,602 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:52:56,602 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:52:56,603 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.625) internal successors, (3725), 8 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:52:56,603 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:52:56,679 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4134
[2023-11-28 23:52:56,679 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:52:56,680 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:52:56,730 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0
[2023-11-28 23:52:56,880 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124
[2023-11-28 23:52:56,880 INFO  L420      AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:52:56,881 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:52:56,881 INFO  L85        PathProgramCache]: Analyzing trace with hash -1093620288, now seen corresponding path program 1 times
[2023-11-28 23:52:56,881 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:52:56,881 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331928992]
[2023-11-28 23:52:56,882 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:56,882 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:52:57,195 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:52:57,195 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446571423]
[2023-11-28 23:52:57,196 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:52:57,196 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:52:57,196 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:52:57,197 INFO  L229       MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:52:57,198 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process
[2023-11-28 23:53:00,916 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:01,023 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17765 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:53:01,070 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:01,292 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked.
[2023-11-28 23:53:01,292 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:01,292 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:01,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331928992]
[2023-11-28 23:53:01,292 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:01,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446571423]
[2023-11-28 23:53:01,292 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [446571423] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:01,292 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:01,293 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:01,293 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885791207]
[2023-11-28 23:53:01,293 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:01,295 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:01,295 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:01,297 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:01,297 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:01,297 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.5) internal successors, (3724), 8 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:01,672 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:01,672 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:01,673 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:01,674 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.5) internal successors, (3724), 8 states have internal predecessors, (3724), 0 states have call successors, (0), 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 4133
[2023-11-28 23:53:01,676 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:01,685 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:01,685 INFO  L226             Difference]: Without dead ends: 11368
[2023-11-28 23:53:01,689 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4141 GetRequests, 4129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:01,689 INFO  L413           NwaCegarLoop]: 9691 mSDtfsCounter, 22900 mSDsluCounter, 45425 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22900 SdHoareTripleChecker+Valid, 55116 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:01,689 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22900 Valid, 55116 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:01,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11368 states.
[2023-11-28 23:53:01,772 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 6367.
[2023-11-28 23:53:01,777 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:01,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:01,785 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4133
[2023-11-28 23:53:01,787 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:01,787 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:01,788 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.5) internal successors, (3724), 8 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:01,788 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:01,868 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4135
[2023-11-28 23:53:01,868 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:01,869 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]
[2023-11-28 23:53:01,919 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0
[2023-11-28 23:53:02,069 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125
[2023-11-28 23:53:02,070 INFO  L420      AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:02,070 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:02,070 INFO  L85        PathProgramCache]: Analyzing trace with hash 1070812724, now seen corresponding path program 1 times
[2023-11-28 23:53:02,070 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:02,070 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016991252]
[2023-11-28 23:53:02,071 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:02,071 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:02,398 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:02,399 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301778999]
[2023-11-28 23:53:02,399 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:02,400 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:02,400 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:02,401 INFO  L229       MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:02,401 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process
[2023-11-28 23:53:06,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:06,332 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17768 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:53:06,380 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:06,605 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked.
[2023-11-28 23:53:06,605 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:06,606 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:06,606 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016991252]
[2023-11-28 23:53:06,606 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:06,606 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301778999]
[2023-11-28 23:53:06,606 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301778999] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:06,606 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:06,607 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:06,607 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70031725]
[2023-11-28 23:53:06,607 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:06,609 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:06,609 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:06,611 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:06,611 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:06,611 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.375) internal successors, (3723), 8 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:07,027 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:07,027 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:07,028 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:07,029 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.375) internal successors, (3723), 8 states have internal predecessors, (3723), 0 states have call successors, (0), 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 4134
[2023-11-28 23:53:07,032 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:07,040 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:07,040 INFO  L226             Difference]: Without dead ends: 11374
[2023-11-28 23:53:07,044 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4142 GetRequests, 4130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:07,045 INFO  L413           NwaCegarLoop]: 9701 mSDtfsCounter, 22896 mSDsluCounter, 47232 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22896 SdHoareTripleChecker+Valid, 56933 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:07,045 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22896 Valid, 56933 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:07,055 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11374 states.
[2023-11-28 23:53:07,120 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 6367.
[2023-11-28 23:53:07,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:07,133 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:07,133 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4134
[2023-11-28 23:53:07,136 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:07,136 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:07,136 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.375) internal successors, (3723), 8 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:07,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:07,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4136
[2023-11-28 23:53:07,217 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:07,218 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:53:07,267 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0
[2023-11-28 23:53:07,418 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126
[2023-11-28 23:53:07,419 INFO  L420      AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:07,419 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:07,420 INFO  L85        PathProgramCache]: Analyzing trace with hash 1815339650, now seen corresponding path program 1 times
[2023-11-28 23:53:07,420 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:07,421 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013151062]
[2023-11-28 23:53:07,421 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:07,421 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:07,742 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:07,742 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238063362]
[2023-11-28 23:53:07,743 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:07,743 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:07,743 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:07,744 INFO  L229       MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:07,745 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process
[2023-11-28 23:53:11,459 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:11,571 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17772 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:53:11,620 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:11,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked.
[2023-11-28 23:53:11,866 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:11,866 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:11,866 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013151062]
[2023-11-28 23:53:11,866 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:11,866 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238063362]
[2023-11-28 23:53:11,866 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238063362] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:11,867 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:11,868 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:11,868 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581994752]
[2023-11-28 23:53:11,868 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:11,870 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:11,870 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:11,872 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:11,872 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:11,873 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.25) internal successors, (3722), 8 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:12,255 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:12,255 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:12,255 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:12,256 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.25) internal successors, (3722), 8 states have internal predecessors, (3722), 0 states have call successors, (0), 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 4135
[2023-11-28 23:53:12,261 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:12,270 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:12,270 INFO  L226             Difference]: Without dead ends: 11380
[2023-11-28 23:53:12,274 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4143 GetRequests, 4131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:12,274 INFO  L413           NwaCegarLoop]: 9711 mSDtfsCounter, 22892 mSDsluCounter, 45491 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22892 SdHoareTripleChecker+Valid, 55202 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:12,275 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22892 Valid, 55202 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:12,284 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11380 states.
[2023-11-28 23:53:12,349 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11380 to 6367.
[2023-11-28 23:53:12,355 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:12,362 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:12,363 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4135
[2023-11-28 23:53:12,365 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:12,365 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:12,366 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.25) internal successors, (3722), 8 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:12,366 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:12,443 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4137
[2023-11-28 23:53:12,443 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:12,444 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]
[2023-11-28 23:53:12,495 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0
[2023-11-28 23:53:12,644 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127
[2023-11-28 23:53:12,645 INFO  L420      AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:12,645 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:12,646 INFO  L85        PathProgramCache]: Analyzing trace with hash -2080454222, now seen corresponding path program 1 times
[2023-11-28 23:53:12,646 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:12,646 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541324205]
[2023-11-28 23:53:12,647 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:12,647 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:12,975 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:12,975 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563957082]
[2023-11-28 23:53:12,976 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:12,976 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:12,976 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:12,977 INFO  L229       MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:12,978 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process
[2023-11-28 23:53:16,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:16,923 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17775 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:53:16,970 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:17,201 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked.
[2023-11-28 23:53:17,201 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:17,201 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:17,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541324205]
[2023-11-28 23:53:17,201 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:17,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563957082]
[2023-11-28 23:53:17,201 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563957082] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:17,202 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:17,203 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:17,203 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579200019]
[2023-11-28 23:53:17,203 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:17,206 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:17,206 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:17,208 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:17,208 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:17,208 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 465.0) internal successors, (3720), 8 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:17,614 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:17,615 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:17,615 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:17,616 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 465.0) internal successors, (3720), 8 states have internal predecessors, (3720), 0 states have call successors, (0), 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 4136
[2023-11-28 23:53:17,619 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:17,627 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:17,627 INFO  L226             Difference]: Without dead ends: 11389
[2023-11-28 23:53:17,632 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4144 GetRequests, 4132 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:17,632 INFO  L413           NwaCegarLoop]: 9726 mSDtfsCounter, 22889 mSDsluCounter, 45542 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22889 SdHoareTripleChecker+Valid, 55268 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:17,632 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22889 Valid, 55268 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:17,642 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11389 states.
[2023-11-28 23:53:17,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11389 to 6367.
[2023-11-28 23:53:17,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:17,723 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:17,723 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4136
[2023-11-28 23:53:17,725 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:17,725 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:17,726 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 465.0) internal successors, (3720), 8 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:17,726 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:17,807 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4138
[2023-11-28 23:53:17,808 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:17,808 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:53:17,859 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0
[2023-11-28 23:53:18,009 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128
[2023-11-28 23:53:18,009 INFO  L420      AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:18,009 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:18,010 INFO  L85        PathProgramCache]: Analyzing trace with hash -1392707744, now seen corresponding path program 1 times
[2023-11-28 23:53:18,010 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:18,010 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811194823]
[2023-11-28 23:53:18,011 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:18,011 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:18,340 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:18,340 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16812405]
[2023-11-28 23:53:18,341 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:18,341 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:18,341 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:18,342 INFO  L229       MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:18,343 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process
[2023-11-28 23:53:22,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:22,324 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17778 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:53:22,371 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:22,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked.
[2023-11-28 23:53:22,601 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:22,601 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:22,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811194823]
[2023-11-28 23:53:22,601 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:22,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16812405]
[2023-11-28 23:53:22,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [16812405] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:22,601 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:22,602 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:53:22,602 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052534703]
[2023-11-28 23:53:22,602 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:22,604 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:53:22,604 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:22,606 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:53:22,606 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:53:22,607 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 531.2857142857143) internal successors, (3719), 7 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:22,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:22,948 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:22,948 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:22,949 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 531.2857142857143) internal successors, (3719), 7 states have internal predecessors, (3719), 0 states have call successors, (0), 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 4137
[2023-11-28 23:53:22,952 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:22,961 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:22,961 INFO  L226             Difference]: Without dead ends: 11395
[2023-11-28 23:53:22,965 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4145 GetRequests, 4134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:53:22,965 INFO  L413           NwaCegarLoop]: 9736 mSDtfsCounter, 22885 mSDsluCounter, 37645 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22885 SdHoareTripleChecker+Valid, 47381 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:22,966 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22885 Valid, 47381 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:22,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11395 states.
[2023-11-28 23:53:23,039 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11395 to 6367.
[2023-11-28 23:53:23,044 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:23,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:23,052 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4137
[2023-11-28 23:53:23,054 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:23,055 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:23,055 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 531.2857142857143) internal successors, (3719), 7 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:23,056 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:23,137 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4139
[2023-11-28 23:53:23,137 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:23,138 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:53:23,188 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0
[2023-11-28 23:53:23,339 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129
[2023-11-28 23:53:23,339 INFO  L420      AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:23,339 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:23,340 INFO  L85        PathProgramCache]: Analyzing trace with hash -355902030, now seen corresponding path program 1 times
[2023-11-28 23:53:23,340 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:23,340 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924963451]
[2023-11-28 23:53:23,341 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:23,341 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:23,659 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:23,660 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033971018]
[2023-11-28 23:53:23,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:23,661 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:23,661 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:23,662 INFO  L229       MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:23,662 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process
[2023-11-28 23:53:27,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:27,600 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17781 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:53:27,649 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:28,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked.
[2023-11-28 23:53:28,002 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:28,002 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:28,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924963451]
[2023-11-28 23:53:28,003 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:28,003 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033971018]
[2023-11-28 23:53:28,003 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033971018] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:28,003 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:28,004 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:28,004 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132841815]
[2023-11-28 23:53:28,004 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:28,006 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:28,006 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:28,008 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:28,008 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:28,009 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 464.75) internal successors, (3718), 8 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:28,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:28,396 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:28,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:28,397 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 464.75) internal successors, (3718), 8 states have internal predecessors, (3718), 0 states have call successors, (0), 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 4138
[2023-11-28 23:53:28,401 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:28,409 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:28,410 INFO  L226             Difference]: Without dead ends: 11401
[2023-11-28 23:53:28,414 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4146 GetRequests, 4134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:28,414 INFO  L413           NwaCegarLoop]: 9746 mSDtfsCounter, 22881 mSDsluCounter, 45608 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22881 SdHoareTripleChecker+Valid, 55354 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:28,414 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22881 Valid, 55354 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:28,424 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11401 states.
[2023-11-28 23:53:28,489 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11401 to 6367.
[2023-11-28 23:53:28,495 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:28,503 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:28,503 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4138
[2023-11-28 23:53:28,505 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:28,505 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:28,506 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 464.75) internal successors, (3718), 8 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:28,506 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:28,587 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4140
[2023-11-28 23:53:28,587 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:28,588 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:53:28,638 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0
[2023-11-28 23:53:28,789 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:28,789 INFO  L420      AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:28,789 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:28,790 INFO  L85        PathProgramCache]: Analyzing trace with hash -314737244, now seen corresponding path program 1 times
[2023-11-28 23:53:28,790 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:28,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913114520]
[2023-11-28 23:53:28,791 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:28,791 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:29,114 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:29,115 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287042819]
[2023-11-28 23:53:29,115 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:29,116 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:29,116 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:29,117 INFO  L229       MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:29,117 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process
[2023-11-28 23:53:32,806 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:32,918 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17784 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:53:32,966 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:33,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked.
[2023-11-28 23:53:33,181 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:33,181 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:33,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913114520]
[2023-11-28 23:53:33,181 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:33,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287042819]
[2023-11-28 23:53:33,181 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287042819] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:33,181 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:33,183 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:53:33,183 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671904513]
[2023-11-28 23:53:33,183 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:33,185 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:53:33,185 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:33,187 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:53:33,187 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:53:33,187 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:33,543 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:33,544 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:33,544 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:33,545 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 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 4139
[2023-11-28 23:53:33,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:33,556 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:33,556 INFO  L226             Difference]: Without dead ends: 11407
[2023-11-28 23:53:33,560 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4147 GetRequests, 4136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:53:33,560 INFO  L413           NwaCegarLoop]: 9756 mSDtfsCounter, 22877 mSDsluCounter, 37705 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22877 SdHoareTripleChecker+Valid, 47461 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:33,560 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22877 Valid, 47461 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:33,569 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11407 states.
[2023-11-28 23:53:33,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11407 to 6367.
[2023-11-28 23:53:33,634 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:33,642 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:33,642 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4139
[2023-11-28 23:53:33,644 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:33,644 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:33,645 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 531.0) internal successors, (3717), 7 states have internal predecessors, (3717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:33,645 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:33,722 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4141
[2023-11-28 23:53:33,722 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:33,723 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:53:33,773 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0
[2023-11-28 23:53:33,923 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:33,923 INFO  L420      AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:33,924 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:33,925 INFO  L85        PathProgramCache]: Analyzing trace with hash -1058600398, now seen corresponding path program 1 times
[2023-11-28 23:53:33,925 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:33,925 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771148627]
[2023-11-28 23:53:33,926 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:33,926 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:34,254 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:34,254 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025543051]
[2023-11-28 23:53:34,255 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:34,255 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:34,255 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:34,256 INFO  L229       MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:34,257 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process
[2023-11-28 23:53:37,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:38,033 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17787 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:53:38,082 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:38,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked.
[2023-11-28 23:53:38,309 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:38,309 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:38,310 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771148627]
[2023-11-28 23:53:38,310 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:38,310 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025543051]
[2023-11-28 23:53:38,310 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025543051] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:38,310 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:38,311 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:38,312 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247055427]
[2023-11-28 23:53:38,312 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:38,314 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:38,314 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:38,316 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:38,316 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:38,316 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 464.5) internal successors, (3716), 8 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:38,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:38,745 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:38,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:38,746 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 464.5) internal successors, (3716), 8 states have internal predecessors, (3716), 0 states have call successors, (0), 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 4140
[2023-11-28 23:53:38,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:38,757 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:38,757 INFO  L226             Difference]: Without dead ends: 11413
[2023-11-28 23:53:38,761 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4148 GetRequests, 4136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:38,762 INFO  L413           NwaCegarLoop]: 9766 mSDtfsCounter, 22873 mSDsluCounter, 45674 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22873 SdHoareTripleChecker+Valid, 55440 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:38,762 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22873 Valid, 55440 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:38,771 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11413 states.
[2023-11-28 23:53:38,836 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11413 to 6367.
[2023-11-28 23:53:38,842 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:38,850 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:38,850 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4140
[2023-11-28 23:53:38,852 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:38,852 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:38,853 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 464.5) internal successors, (3716), 8 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:38,853 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:38,934 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4142
[2023-11-28 23:53:38,934 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:38,935 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:53:38,985 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0
[2023-11-28 23:53:39,135 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:39,135 INFO  L420      AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:39,136 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:39,136 INFO  L85        PathProgramCache]: Analyzing trace with hash 198787176, now seen corresponding path program 1 times
[2023-11-28 23:53:39,136 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:39,136 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614276418]
[2023-11-28 23:53:39,137 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:39,137 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:39,460 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:39,460 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233749213]
[2023-11-28 23:53:39,461 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:39,461 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:39,461 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:39,462 INFO  L229       MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:39,463 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process
[2023-11-28 23:53:43,230 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:43,346 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17790 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:53:43,395 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:43,632 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked.
[2023-11-28 23:53:43,632 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:43,632 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:43,632 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614276418]
[2023-11-28 23:53:43,632 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:43,633 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233749213]
[2023-11-28 23:53:43,633 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233749213] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:43,633 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:43,634 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:53:43,634 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077215911]
[2023-11-28 23:53:43,634 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:43,637 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:53:43,637 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:43,638 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:53:43,638 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:53:43,639 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 530.7142857142857) internal successors, (3715), 7 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:43,977 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:43,977 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:43,977 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:43,978 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 530.7142857142857) internal successors, (3715), 7 states have internal predecessors, (3715), 0 states have call successors, (0), 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 4141
[2023-11-28 23:53:43,981 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:43,990 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:43,990 INFO  L226             Difference]: Without dead ends: 11419
[2023-11-28 23:53:43,995 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4149 GetRequests, 4138 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:53:43,995 INFO  L413           NwaCegarLoop]: 9776 mSDtfsCounter, 22869 mSDsluCounter, 37765 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22869 SdHoareTripleChecker+Valid, 47541 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:43,995 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22869 Valid, 47541 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:44,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11419 states.
[2023-11-28 23:53:44,071 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11419 to 6367.
[2023-11-28 23:53:44,076 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:44,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:44,085 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4141
[2023-11-28 23:53:44,087 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:44,087 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:44,088 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 530.7142857142857) internal successors, (3715), 7 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:44,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:44,169 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4143
[2023-11-28 23:53:44,169 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:44,170 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:53:44,221 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0
[2023-11-28 23:53:44,371 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133
[2023-11-28 23:53:44,371 INFO  L420      AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:44,371 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:44,372 INFO  L85        PathProgramCache]: Analyzing trace with hash -467644622, now seen corresponding path program 1 times
[2023-11-28 23:53:44,372 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:44,372 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11183604]
[2023-11-28 23:53:44,372 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:44,373 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:44,708 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:44,708 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782697504]
[2023-11-28 23:53:44,709 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:44,709 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:44,710 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:44,710 INFO  L229       MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:44,711 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process
[2023-11-28 23:53:48,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:48,567 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17793 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:53:48,616 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:48,836 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked.
[2023-11-28 23:53:48,836 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:48,836 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:48,836 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11183604]
[2023-11-28 23:53:48,836 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:48,836 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782697504]
[2023-11-28 23:53:48,836 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782697504] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:48,837 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:48,838 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:53:48,838 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67497435]
[2023-11-28 23:53:48,838 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:48,841 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:53:48,841 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:48,842 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:53:48,843 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:53:48,843 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 530.5714285714286) internal successors, (3714), 7 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:49,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:49,210 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:49,210 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:49,211 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 530.5714285714286) internal successors, (3714), 7 states have internal predecessors, (3714), 0 states have call successors, (0), 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 4142
[2023-11-28 23:53:49,214 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:49,223 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:49,223 INFO  L226             Difference]: Without dead ends: 11425
[2023-11-28 23:53:49,227 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4150 GetRequests, 4139 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:53:49,227 INFO  L413           NwaCegarLoop]: 9786 mSDtfsCounter, 22865 mSDsluCounter, 37795 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22865 SdHoareTripleChecker+Valid, 47581 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:49,228 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22865 Valid, 47581 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:49,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11425 states.
[2023-11-28 23:53:49,365 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11425 to 6367.
[2023-11-28 23:53:49,371 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:49,378 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:49,379 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4142
[2023-11-28 23:53:49,381 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:49,381 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:49,381 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 530.5714285714286) internal successors, (3714), 7 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:49,382 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:49,458 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4144
[2023-11-28 23:53:49,459 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:49,459 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:53:49,510 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0
[2023-11-28 23:53:49,660 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:49,660 INFO  L420      AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:49,660 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:49,661 INFO  L85        PathProgramCache]: Analyzing trace with hash -948306004, now seen corresponding path program 1 times
[2023-11-28 23:53:49,661 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:49,661 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682375617]
[2023-11-28 23:53:49,662 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:49,662 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:50,035 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:50,035 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204121896]
[2023-11-28 23:53:50,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:50,036 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:50,036 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:50,037 INFO  L229       MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:50,038 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process
[2023-11-28 23:53:53,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:53,988 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17796 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:53:54,037 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:54,259 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked.
[2023-11-28 23:53:54,260 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:54,260 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:54,260 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682375617]
[2023-11-28 23:53:54,260 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:54,260 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204121896]
[2023-11-28 23:53:54,260 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204121896] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:54,260 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:54,262 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:53:54,262 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977446329]
[2023-11-28 23:53:54,262 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:54,264 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:53:54,264 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:54,266 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:53:54,266 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:53:54,267 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 530.4285714285714) internal successors, (3713), 7 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:54,626 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:54,626 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:54,626 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:54,627 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 530.4285714285714) internal successors, (3713), 7 states have internal predecessors, (3713), 0 states have call successors, (0), 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 4143
[2023-11-28 23:53:54,630 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:54,638 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:54,639 INFO  L226             Difference]: Without dead ends: 11431
[2023-11-28 23:53:54,643 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4151 GetRequests, 4140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:53:54,643 INFO  L413           NwaCegarLoop]: 9796 mSDtfsCounter, 22861 mSDsluCounter, 37825 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22861 SdHoareTripleChecker+Valid, 47621 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:54,644 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22861 Valid, 47621 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:54,653 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11431 states.
[2023-11-28 23:53:54,724 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 6367.
[2023-11-28 23:53:54,729 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:54,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:53:54,737 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4143
[2023-11-28 23:53:54,740 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:54,740 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:53:54,740 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 530.4285714285714) internal successors, (3713), 7 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:54,741 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:53:54,821 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4145
[2023-11-28 23:53:54,821 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:54,822 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:53:54,872 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0
[2023-11-28 23:53:55,022 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135
[2023-11-28 23:53:55,023 INFO  L420      AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:55,023 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:55,024 INFO  L85        PathProgramCache]: Analyzing trace with hash -1285182286, now seen corresponding path program 1 times
[2023-11-28 23:53:55,025 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:55,025 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426263035]
[2023-11-28 23:53:55,026 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:55,026 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:55,354 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:55,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576154937]
[2023-11-28 23:53:55,355 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:55,355 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:55,355 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:55,356 INFO  L229       MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:55,357 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process
[2023-11-28 23:53:59,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:59,270 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17799 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:53:59,320 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:59,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked.
[2023-11-28 23:53:59,560 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:59,561 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:59,561 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426263035]
[2023-11-28 23:53:59,561 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:59,561 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576154937]
[2023-11-28 23:53:59,561 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576154937] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:59,561 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:59,563 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:53:59,563 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529218290]
[2023-11-28 23:53:59,563 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:59,565 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:53:59,565 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:59,567 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:53:59,567 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:53:59,568 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 464.0) internal successors, (3712), 8 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:59,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:59,959 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:53:59,959 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:53:59,960 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 464.0) internal successors, (3712), 8 states have internal predecessors, (3712), 0 states have call successors, (0), 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 4144
[2023-11-28 23:53:59,963 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:59,971 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:53:59,971 INFO  L226             Difference]: Without dead ends: 11437
[2023-11-28 23:53:59,975 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4152 GetRequests, 4140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:53:59,975 INFO  L413           NwaCegarLoop]: 9806 mSDtfsCounter, 22857 mSDsluCounter, 45806 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22857 SdHoareTripleChecker+Valid, 55612 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:59,976 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22857 Valid, 55612 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:53:59,985 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11437 states.
[2023-11-28 23:54:00,054 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11437 to 6367.
[2023-11-28 23:54:00,060 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:00,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:00,068 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4144
[2023-11-28 23:54:00,070 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:00,070 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:00,071 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 464.0) internal successors, (3712), 8 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:00,071 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:00,186 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 23:54:00,186 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:00,187 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:54:00,236 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0
[2023-11-28 23:54:00,387 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136
[2023-11-28 23:54:00,387 INFO  L420      AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:00,389 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:00,389 INFO  L85        PathProgramCache]: Analyzing trace with hash -1401848976, now seen corresponding path program 1 times
[2023-11-28 23:54:00,389 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:00,389 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524954621]
[2023-11-28 23:54:00,390 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:00,390 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:00,707 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:00,707 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707239854]
[2023-11-28 23:54:00,708 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:00,708 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:00,708 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:00,709 INFO  L229       MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:00,709 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process
[2023-11-28 23:54:04,475 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:04,587 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17802 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:54:04,636 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:04,860 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked.
[2023-11-28 23:54:04,860 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:04,860 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:04,860 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524954621]
[2023-11-28 23:54:04,860 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:04,860 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707239854]
[2023-11-28 23:54:04,860 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707239854] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:04,860 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:04,862 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:54:04,862 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019682945]
[2023-11-28 23:54:04,862 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:04,864 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:54:04,864 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:04,865 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:54:04,865 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:54:04,866 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:05,212 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:05,212 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:05,212 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:05,213 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 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 4145
[2023-11-28 23:54:05,216 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:05,225 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:05,225 INFO  L226             Difference]: Without dead ends: 11443
[2023-11-28 23:54:05,229 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4153 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:54:05,229 INFO  L413           NwaCegarLoop]: 9816 mSDtfsCounter, 22853 mSDsluCounter, 37885 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22853 SdHoareTripleChecker+Valid, 47701 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:05,229 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22853 Valid, 47701 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:05,238 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11443 states.
[2023-11-28 23:54:05,303 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11443 to 6367.
[2023-11-28 23:54:05,309 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:05,321 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:05,321 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4145
[2023-11-28 23:54:05,323 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:05,324 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:05,325 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:05,325 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:05,409 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4147
[2023-11-28 23:54:05,410 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:05,410 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:54:05,460 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0
[2023-11-28 23:54:05,611 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:05,611 INFO  L420      AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:05,612 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:05,612 INFO  L85        PathProgramCache]: Analyzing trace with hash -556817742, now seen corresponding path program 1 times
[2023-11-28 23:54:05,612 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:05,612 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474139471]
[2023-11-28 23:54:05,613 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:05,614 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:05,953 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:05,954 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379235549]
[2023-11-28 23:54:05,955 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:05,955 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:05,955 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:05,956 INFO  L229       MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:05,957 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process
[2023-11-28 23:54:09,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:09,961 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17805 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:54:10,009 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:10,258 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked.
[2023-11-28 23:54:10,258 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:10,258 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:10,259 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474139471]
[2023-11-28 23:54:10,259 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:10,259 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379235549]
[2023-11-28 23:54:10,259 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [379235549] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:10,259 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:10,261 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:10,261 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338796441]
[2023-11-28 23:54:10,261 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:10,263 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:10,263 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:10,266 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:10,266 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:10,266 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 463.75) internal successors, (3710), 8 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:10,679 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:10,679 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:10,679 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:10,680 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 463.75) internal successors, (3710), 8 states have internal predecessors, (3710), 0 states have call successors, (0), 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 4146
[2023-11-28 23:54:10,684 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:10,692 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:10,692 INFO  L226             Difference]: Without dead ends: 11449
[2023-11-28 23:54:10,697 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4154 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:10,697 INFO  L413           NwaCegarLoop]: 9826 mSDtfsCounter, 22849 mSDsluCounter, 45872 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22849 SdHoareTripleChecker+Valid, 55698 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:10,697 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22849 Valid, 55698 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:10,707 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11449 states.
[2023-11-28 23:54:10,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11449 to 6367.
[2023-11-28 23:54:10,778 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:10,787 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:10,787 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4146
[2023-11-28 23:54:10,789 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:10,789 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:10,790 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 463.75) internal successors, (3710), 8 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:10,790 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:10,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4148
[2023-11-28 23:54:10,874 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:10,874 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:54:10,925 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0
[2023-11-28 23:54:11,075 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:11,075 INFO  L420      AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:11,075 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:11,076 INFO  L85        PathProgramCache]: Analyzing trace with hash 1220113332, now seen corresponding path program 1 times
[2023-11-28 23:54:11,076 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:11,076 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871695675]
[2023-11-28 23:54:11,077 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:11,077 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:11,431 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:11,431 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098421041]
[2023-11-28 23:54:11,432 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:11,432 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:11,432 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:11,433 INFO  L229       MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:11,434 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process
[2023-11-28 23:54:15,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:15,266 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17808 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:54:15,317 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:15,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked.
[2023-11-28 23:54:15,556 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:15,556 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:15,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871695675]
[2023-11-28 23:54:15,556 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:15,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098421041]
[2023-11-28 23:54:15,557 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098421041] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:15,557 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:15,558 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:15,558 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838480297]
[2023-11-28 23:54:15,558 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:15,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:15,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:15,561 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:15,561 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:15,562 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 463.5) internal successors, (3708), 8 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:15,960 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:15,960 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:15,960 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:15,961 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 463.5) internal successors, (3708), 8 states have internal predecessors, (3708), 0 states have call successors, (0), 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 4147
[2023-11-28 23:54:15,964 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:15,973 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:15,973 INFO  L226             Difference]: Without dead ends: 11458
[2023-11-28 23:54:15,977 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4155 GetRequests, 4143 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:15,977 INFO  L413           NwaCegarLoop]: 9841 mSDtfsCounter, 22846 mSDsluCounter, 47792 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22846 SdHoareTripleChecker+Valid, 57633 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:15,978 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22846 Valid, 57633 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:15,987 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11458 states.
[2023-11-28 23:54:16,055 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11458 to 6367.
[2023-11-28 23:54:16,061 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:16,069 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:16,069 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4147
[2023-11-28 23:54:16,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:16,071 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:16,072 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 463.5) internal successors, (3708), 8 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:16,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:16,152 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4149
[2023-11-28 23:54:16,152 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:16,153 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 23:54:16,204 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0
[2023-11-28 23:54:16,353 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:16,354 INFO  L420      AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:16,354 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:16,354 INFO  L85        PathProgramCache]: Analyzing trace with hash 1330437962, now seen corresponding path program 1 times
[2023-11-28 23:54:16,354 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:16,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039255889]
[2023-11-28 23:54:16,355 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:16,355 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:16,682 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:16,682 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085833515]
[2023-11-28 23:54:16,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:16,683 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:16,683 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:16,684 INFO  L229       MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:16,684 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process
[2023-11-28 23:54:20,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:20,670 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17812 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:54:20,719 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:20,959 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked.
[2023-11-28 23:54:20,960 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:20,960 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:20,960 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039255889]
[2023-11-28 23:54:20,960 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:20,960 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085833515]
[2023-11-28 23:54:20,960 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085833515] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:20,960 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:20,962 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:20,962 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030956339]
[2023-11-28 23:54:20,962 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:20,965 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:20,965 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:20,966 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:20,966 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:20,967 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 463.375) internal successors, (3707), 8 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:21,393 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:21,393 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:21,393 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:21,394 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 463.375) internal successors, (3707), 8 states have internal predecessors, (3707), 0 states have call successors, (0), 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 4148
[2023-11-28 23:54:21,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:21,407 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:21,407 INFO  L226             Difference]: Without dead ends: 11464
[2023-11-28 23:54:21,411 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4156 GetRequests, 4144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:21,411 INFO  L413           NwaCegarLoop]: 9851 mSDtfsCounter, 22842 mSDsluCounter, 45956 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22842 SdHoareTripleChecker+Valid, 55807 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:21,411 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22842 Valid, 55807 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:21,421 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11464 states.
[2023-11-28 23:54:21,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11464 to 6367.
[2023-11-28 23:54:21,493 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:21,501 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:21,502 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4148
[2023-11-28 23:54:21,504 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:21,504 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:21,505 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 463.375) internal successors, (3707), 8 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:21,505 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:21,587 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4150
[2023-11-28 23:54:21,587 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:21,588 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:54:21,638 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0
[2023-11-28 23:54:21,788 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:21,789 INFO  L420      AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:21,789 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:21,789 INFO  L85        PathProgramCache]: Analyzing trace with hash 1624006262, now seen corresponding path program 1 times
[2023-11-28 23:54:21,790 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:21,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296915669]
[2023-11-28 23:54:21,790 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:21,790 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:22,114 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:22,114 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630279480]
[2023-11-28 23:54:22,114 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:22,115 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:22,115 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:22,116 INFO  L229       MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:22,119 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process
[2023-11-28 23:54:25,969 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:26,082 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17815 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:54:26,130 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:26,347 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked.
[2023-11-28 23:54:26,347 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:26,347 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:26,347 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296915669]
[2023-11-28 23:54:26,347 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:26,347 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630279480]
[2023-11-28 23:54:26,348 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [630279480] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:26,348 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:26,349 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:26,349 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126157]
[2023-11-28 23:54:26,349 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:26,352 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:26,352 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:26,354 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:26,354 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:26,355 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 463.25) internal successors, (3706), 8 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:26,759 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:26,760 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:26,760 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:26,761 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 463.25) internal successors, (3706), 8 states have internal predecessors, (3706), 0 states have call successors, (0), 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 4149
[2023-11-28 23:54:26,764 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:26,771 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:26,772 INFO  L226             Difference]: Without dead ends: 11470
[2023-11-28 23:54:26,775 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4157 GetRequests, 4145 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:26,776 INFO  L413           NwaCegarLoop]: 9861 mSDtfsCounter, 22838 mSDsluCounter, 47872 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22838 SdHoareTripleChecker+Valid, 57733 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:26,776 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22838 Valid, 57733 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:26,784 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11470 states.
[2023-11-28 23:54:26,849 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 6367.
[2023-11-28 23:54:26,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:26,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:26,862 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4149
[2023-11-28 23:54:26,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:26,864 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:26,865 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 463.25) internal successors, (3706), 8 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:26,865 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:26,943 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4151
[2023-11-28 23:54:26,943 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:26,944 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]
[2023-11-28 23:54:26,992 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0
[2023-11-28 23:54:27,144 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:27,145 INFO  L420      AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:27,145 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:27,145 INFO  L85        PathProgramCache]: Analyzing trace with hash 1625848392, now seen corresponding path program 1 times
[2023-11-28 23:54:27,145 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:27,145 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467161202]
[2023-11-28 23:54:27,146 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:27,146 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:27,469 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:27,470 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381247549]
[2023-11-28 23:54:27,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:27,470 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:27,471 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:27,471 INFO  L229       MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:27,472 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process
[2023-11-28 23:54:31,311 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:31,422 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17819 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:54:31,470 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:31,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked.
[2023-11-28 23:54:31,700 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:31,700 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:31,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467161202]
[2023-11-28 23:54:31,700 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:31,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381247549]
[2023-11-28 23:54:31,700 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381247549] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:31,700 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:31,702 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:31,702 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231869745]
[2023-11-28 23:54:31,702 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:31,704 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:31,704 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:31,706 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:31,706 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:31,707 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 463.125) internal successors, (3705), 8 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:32,082 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:32,082 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:32,082 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:32,083 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 463.125) internal successors, (3705), 8 states have internal predecessors, (3705), 0 states have call successors, (0), 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 4150
[2023-11-28 23:54:32,086 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:32,095 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:32,095 INFO  L226             Difference]: Without dead ends: 11476
[2023-11-28 23:54:32,099 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4158 GetRequests, 4146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:32,100 INFO  L413           NwaCegarLoop]: 9871 mSDtfsCounter, 22834 mSDsluCounter, 46022 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22834 SdHoareTripleChecker+Valid, 55893 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:32,100 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22834 Valid, 55893 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:32,109 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11476 states.
[2023-11-28 23:54:32,175 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 6367.
[2023-11-28 23:54:32,181 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:32,189 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:32,189 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4150
[2023-11-28 23:54:32,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:32,192 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:32,192 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 463.125) internal successors, (3705), 8 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:32,192 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:32,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4152
[2023-11-28 23:54:32,276 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:32,277 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:54:32,327 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0
[2023-11-28 23:54:32,477 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:32,478 INFO  L420      AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:32,478 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:32,479 INFO  L85        PathProgramCache]: Analyzing trace with hash 506006328, now seen corresponding path program 1 times
[2023-11-28 23:54:32,479 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:32,479 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799428352]
[2023-11-28 23:54:32,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:32,480 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:32,818 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:32,818 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104232001]
[2023-11-28 23:54:32,819 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:32,819 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:32,819 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:32,820 INFO  L229       MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:32,821 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process
[2023-11-28 23:54:36,529 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:36,638 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17822 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:54:36,685 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:36,913 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked.
[2023-11-28 23:54:36,913 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:36,913 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:36,913 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799428352]
[2023-11-28 23:54:36,914 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:36,914 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104232001]
[2023-11-28 23:54:36,914 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104232001] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:36,914 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:36,915 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:54:36,916 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795009724]
[2023-11-28 23:54:36,916 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:36,918 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:54:36,918 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:36,920 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:54:36,920 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:54:36,921 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 529.1428571428571) internal successors, (3704), 7 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:37,260 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:37,260 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:37,260 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:37,261 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 529.1428571428571) internal successors, (3704), 7 states have internal predecessors, (3704), 0 states have call successors, (0), 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 4151
[2023-11-28 23:54:37,264 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:37,272 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:37,272 INFO  L226             Difference]: Without dead ends: 11482
[2023-11-28 23:54:37,276 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4159 GetRequests, 4148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:54:37,276 INFO  L413           NwaCegarLoop]: 9881 mSDtfsCounter, 22830 mSDsluCounter, 38080 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22830 SdHoareTripleChecker+Valid, 47961 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:37,276 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22830 Valid, 47961 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:37,285 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11482 states.
[2023-11-28 23:54:37,344 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 6367.
[2023-11-28 23:54:37,349 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:37,357 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:37,357 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4151
[2023-11-28 23:54:37,360 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:37,360 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:37,360 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 529.1428571428571) internal successors, (3704), 7 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:37,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:37,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4153
[2023-11-28 23:54:37,434 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:37,435 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]
[2023-11-28 23:54:37,483 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0
[2023-11-28 23:54:37,635 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143
[2023-11-28 23:54:37,635 INFO  L420      AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:37,636 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:37,636 INFO  L85        PathProgramCache]: Analyzing trace with hash 872772422, now seen corresponding path program 1 times
[2023-11-28 23:54:37,636 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:37,636 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61705646]
[2023-11-28 23:54:37,637 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:37,637 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:37,931 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:37,931 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365773091]
[2023-11-28 23:54:37,932 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:37,932 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:37,932 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:37,933 INFO  L229       MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:37,934 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process
[2023-11-28 23:54:41,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:41,856 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17826 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:54:41,904 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:42,140 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked.
[2023-11-28 23:54:42,140 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:42,141 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:42,141 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61705646]
[2023-11-28 23:54:42,141 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:42,141 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365773091]
[2023-11-28 23:54:42,141 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365773091] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:42,141 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:42,143 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:42,143 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601576316]
[2023-11-28 23:54:42,143 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:42,145 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:42,145 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:42,147 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:42,147 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:42,148 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 462.875) internal successors, (3703), 8 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:42,545 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:42,545 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:42,545 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:42,546 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 462.875) internal successors, (3703), 8 states have internal predecessors, (3703), 0 states have call successors, (0), 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 4152
[2023-11-28 23:54:42,549 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:42,557 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:42,557 INFO  L226             Difference]: Without dead ends: 11488
[2023-11-28 23:54:42,562 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4160 GetRequests, 4148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:42,562 INFO  L413           NwaCegarLoop]: 9891 mSDtfsCounter, 22826 mSDsluCounter, 47992 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22826 SdHoareTripleChecker+Valid, 57883 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:42,562 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22826 Valid, 57883 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:42,571 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11488 states.
[2023-11-28 23:54:42,639 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11488 to 6367.
[2023-11-28 23:54:42,644 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:42,652 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:42,652 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4152
[2023-11-28 23:54:42,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:42,654 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:42,655 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 462.875) internal successors, (3703), 8 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:42,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:42,739 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4154
[2023-11-28 23:54:42,739 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:42,740 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:54:42,789 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0
[2023-11-28 23:54:42,940 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144
[2023-11-28 23:54:42,941 INFO  L420      AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:42,941 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:42,941 INFO  L85        PathProgramCache]: Analyzing trace with hash 397548026, now seen corresponding path program 1 times
[2023-11-28 23:54:42,941 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:42,941 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471020262]
[2023-11-28 23:54:42,942 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:42,942 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:43,267 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:43,267 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626360440]
[2023-11-28 23:54:43,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:43,268 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:43,268 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:43,269 INFO  L229       MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:43,270 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process
[2023-11-28 23:54:47,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:47,340 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17829 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:54:47,388 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:47,611 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked.
[2023-11-28 23:54:47,611 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:47,611 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:47,611 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471020262]
[2023-11-28 23:54:47,611 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:47,611 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626360440]
[2023-11-28 23:54:47,611 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626360440] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:47,611 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:47,613 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:47,613 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674557978]
[2023-11-28 23:54:47,613 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:47,616 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:47,616 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:47,618 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:47,618 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:47,618 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 462.75) internal successors, (3702), 8 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:48,036 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:48,036 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:48,036 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:48,037 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 462.75) internal successors, (3702), 8 states have internal predecessors, (3702), 0 states have call successors, (0), 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 4153
[2023-11-28 23:54:48,040 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:48,049 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:48,049 INFO  L226             Difference]: Without dead ends: 11494
[2023-11-28 23:54:48,053 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4161 GetRequests, 4149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:48,053 INFO  L413           NwaCegarLoop]: 9901 mSDtfsCounter, 22822 mSDsluCounter, 48032 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22822 SdHoareTripleChecker+Valid, 57933 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:48,054 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22822 Valid, 57933 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:48,063 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11494 states.
[2023-11-28 23:54:48,130 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 6367.
[2023-11-28 23:54:48,135 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:48,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:48,143 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4153
[2023-11-28 23:54:48,145 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:48,145 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:48,146 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 462.75) internal successors, (3702), 8 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:48,146 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:48,229 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4155
[2023-11-28 23:54:48,229 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:48,230 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]
[2023-11-28 23:54:48,280 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0
[2023-11-28 23:54:48,430 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145
[2023-11-28 23:54:48,431 INFO  L420      AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:48,431 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:48,432 INFO  L85        PathProgramCache]: Analyzing trace with hash 2116889156, now seen corresponding path program 1 times
[2023-11-28 23:54:48,433 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:48,433 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228075205]
[2023-11-28 23:54:48,434 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:48,434 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:48,773 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:48,773 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737661946]
[2023-11-28 23:54:48,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:48,774 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:48,774 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:48,775 INFO  L229       MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:48,775 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process
[2023-11-28 23:54:52,665 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:52,783 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17833 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 23:54:52,830 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:53,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked.
[2023-11-28 23:54:53,037 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:53,037 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:53,037 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228075205]
[2023-11-28 23:54:53,037 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:53,037 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737661946]
[2023-11-28 23:54:53,037 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737661946] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:53,037 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:53,039 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-28 23:54:53,039 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106120517]
[2023-11-28 23:54:53,039 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:53,041 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 23:54:53,041 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:53,043 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 23:54:53,043 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:54:53,043 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 7 states, 7 states have (on average 528.7142857142857) internal successors, (3701), 7 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:53,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:53,384 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:53,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:53,385 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 528.7142857142857) internal successors, (3701), 7 states have internal predecessors, (3701), 0 states have call successors, (0), 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 4154
[2023-11-28 23:54:53,388 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:53,396 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:53,396 INFO  L226             Difference]: Without dead ends: 11500
[2023-11-28 23:54:53,401 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4162 GetRequests, 4151 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2023-11-28 23:54:53,401 INFO  L413           NwaCegarLoop]: 9911 mSDtfsCounter, 22818 mSDsluCounter, 38170 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22818 SdHoareTripleChecker+Valid, 48081 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:53,401 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22818 Valid, 48081 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:53,411 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11500 states.
[2023-11-28 23:54:53,476 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 6367.
[2023-11-28 23:54:53,481 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:53,489 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:53,489 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4154
[2023-11-28 23:54:53,492 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:53,492 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:53,492 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 528.7142857142857) internal successors, (3701), 7 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:53,493 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:53,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4156
[2023-11-28 23:54:53,571 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:53,571 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:54:53,623 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0
[2023-11-28 23:54:53,772 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146
[2023-11-28 23:54:53,772 INFO  L420      AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:53,772 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:53,773 INFO  L85        PathProgramCache]: Analyzing trace with hash -477484356, now seen corresponding path program 1 times
[2023-11-28 23:54:53,773 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:53,773 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212384974]
[2023-11-28 23:54:53,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:53,773 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:54,065 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:54,066 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741121192]
[2023-11-28 23:54:54,066 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:54,066 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:54,067 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:54,067 INFO  L229       MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:54,068 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process
[2023-11-28 23:54:57,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:54:57,984 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17836 conjuncts, 21 conjunts are in the unsatisfiable core
[2023-11-28 23:54:58,029 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:54:58,261 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked.
[2023-11-28 23:54:58,262 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:54:58,262 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:58,262 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212384974]
[2023-11-28 23:54:58,262 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:58,262 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741121192]
[2023-11-28 23:54:58,262 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741121192] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:54:58,262 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:54:58,264 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:54:58,264 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202449684]
[2023-11-28 23:54:58,264 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:54:58,266 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:54:58,266 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:58,267 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:54:58,267 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:54:58,268 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 462.5) internal successors, (3700), 8 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:58,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:54:58,651 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:54:58,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:54:58,652 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 462.5) internal successors, (3700), 8 states have internal predecessors, (3700), 0 states have call successors, (0), 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 4155
[2023-11-28 23:54:58,656 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:54:58,663 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:54:58,663 INFO  L226             Difference]: Without dead ends: 11506
[2023-11-28 23:54:58,668 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4163 GetRequests, 4151 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:54:58,668 INFO  L413           NwaCegarLoop]: 9921 mSDtfsCounter, 22814 mSDsluCounter, 46187 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22814 SdHoareTripleChecker+Valid, 56108 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:54:58,668 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22814 Valid, 56108 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:54:58,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11506 states.
[2023-11-28 23:54:58,737 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 6367.
[2023-11-28 23:54:58,742 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:58,750 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:54:58,750 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4155
[2023-11-28 23:54:58,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:54:58,752 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:54:58,753 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 462.5) internal successors, (3700), 8 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:54:58,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:54:58,835 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4157
[2023-11-28 23:54:58,835 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:54:58,836 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]
[2023-11-28 23:54:58,884 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0
[2023-11-28 23:54:59,036 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147
[2023-11-28 23:54:59,037 INFO  L420      AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:54:59,037 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:54:59,038 INFO  L85        PathProgramCache]: Analyzing trace with hash -1683423422, now seen corresponding path program 1 times
[2023-11-28 23:54:59,038 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:54:59,038 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65413926]
[2023-11-28 23:54:59,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:59,039 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:54:59,363 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:54:59,363 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409351119]
[2023-11-28 23:54:59,364 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:54:59,364 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:54:59,364 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:54:59,365 INFO  L229       MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:54:59,366 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process
[2023-11-28 23:55:03,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:55:03,437 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17840 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:55:03,487 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:55:03,735 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked.
[2023-11-28 23:55:03,735 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:55:03,735 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:55:03,736 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65413926]
[2023-11-28 23:55:03,736 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:55:03,736 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409351119]
[2023-11-28 23:55:03,736 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409351119] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:55:03,736 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:55:03,737 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:55:03,738 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497171413]
[2023-11-28 23:55:03,738 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:55:03,740 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:55:03,740 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:55:03,742 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:55:03,742 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:55:03,742 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 462.375) internal successors, (3699), 8 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:55:04,154 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:55:04,154 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:55:04,154 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:55:04,155 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 462.375) internal successors, (3699), 8 states have internal predecessors, (3699), 0 states have call successors, (0), 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 4156
[2023-11-28 23:55:04,158 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:55:04,168 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:55:04,168 INFO  L226             Difference]: Without dead ends: 11512
[2023-11-28 23:55:04,172 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4164 GetRequests, 4152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:55:04,173 INFO  L413           NwaCegarLoop]: 9931 mSDtfsCounter, 22810 mSDsluCounter, 48152 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22810 SdHoareTripleChecker+Valid, 58083 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:55:04,173 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22810 Valid, 58083 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:55:04,182 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11512 states.
[2023-11-28 23:55:04,250 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 6367.
[2023-11-28 23:55:04,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:55:04,263 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:55:04,263 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4156
[2023-11-28 23:55:04,266 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:55:04,266 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:55:04,267 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 462.375) internal successors, (3699), 8 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:55:04,267 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:55:04,346 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4158
[2023-11-28 23:55:04,346 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:55:04,347 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:55:04,397 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0
[2023-11-28 23:55:04,547 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:55:04,547 INFO  L420      AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:55:04,548 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:55:04,549 INFO  L85        PathProgramCache]: Analyzing trace with hash 1762909566, now seen corresponding path program 1 times
[2023-11-28 23:55:04,549 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:55:04,549 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217050919]
[2023-11-28 23:55:04,550 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:55:04,550 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:55:04,852 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:55:04,852 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963535471]
[2023-11-28 23:55:04,853 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:55:04,853 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:55:04,853 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:55:04,854 INFO  L229       MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:55:04,855 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process
[2023-11-28 23:55:08,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:55:08,674 INFO  L262         TraceCheckSpWp]: Trace formula consists of 17843 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-28 23:55:08,724 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:55:09,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 622 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked.
[2023-11-28 23:55:09,102 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:55:09,102 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:55:09,103 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217050919]
[2023-11-28 23:55:09,103 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:55:09,103 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963535471]
[2023-11-28 23:55:09,103 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963535471] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:55:09,103 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:55:09,105 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-28 23:55:09,105 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051851949]
[2023-11-28 23:55:09,105 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:55:09,107 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 23:55:09,107 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:55:09,109 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 23:55:09,109 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:55:09,110 INFO  L87              Difference]: Start difference. First operand 6367 states and 10497 transitions. Second operand  has 8 states, 8 states have (on average 462.25) internal successors, (3698), 8 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:55:09,530 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:55:09,530 INFO  L93              Difference]: Finished difference Result 16736 states and 27551 transitions.
[2023-11-28 23:55:09,530 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 23:55:09,531 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 462.25) internal successors, (3698), 8 states have internal predecessors, (3698), 0 states have call successors, (0), 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 4157
[2023-11-28 23:55:09,534 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:55:09,542 INFO  L225             Difference]: With dead ends: 16736
[2023-11-28 23:55:09,542 INFO  L226             Difference]: Without dead ends: 11518
[2023-11-28 23:55:09,547 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4165 GetRequests, 4153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2023-11-28 23:55:09,547 INFO  L413           NwaCegarLoop]: 9941 mSDtfsCounter, 22806 mSDsluCounter, 46253 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22806 SdHoareTripleChecker+Valid, 56194 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:55:09,547 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22806 Valid, 56194 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:55:09,557 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11518 states.
[2023-11-28 23:55:09,625 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11518 to 6367.
[2023-11-28 23:55:09,630 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6367 states, 6366 states have (on average 1.6489161168708766) internal successors, (10497), 6366 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:55:09,638 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 10497 transitions.
[2023-11-28 23:55:09,639 INFO  L78                 Accepts]: Start accepts. Automaton has 6367 states and 10497 transitions. Word has length 4157
[2023-11-28 23:55:09,641 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:55:09,641 INFO  L495      AbstractCegarLoop]: Abstraction has 6367 states and 10497 transitions.
[2023-11-28 23:55:09,642 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 462.25) internal successors, (3698), 8 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:55:09,642 INFO  L276                IsEmpty]: Start isEmpty. Operand 6367 states and 10497 transitions.
[2023-11-28 23:55:09,726 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4159
[2023-11-28 23:55:09,727 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:55:09,727 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-28 23:55:09,778 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0
[2023-11-28 23:55:09,928 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149
[2023-11-28 23:55:09,928 INFO  L420      AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:55:09,928 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:55:09,929 INFO  L85        PathProgramCache]: Analyzing trace with hash -41790912, now seen corresponding path program 1 times
[2023-11-28 23:55:09,929 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:55:09,929 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146549906]
[2023-11-28 23:55:09,930 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:55:09,930 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:55:10,271 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:55:10,271 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626165034]
[2023-11-28 23:55:10,272 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:55:10,272 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:55:10,272 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:55:10,273 INFO  L229       MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:55:10,274 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af3f04ad-86d7-4a4c-a68e-5492c056434e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process