./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.4.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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/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 e24e31822dc426b20835e6773e2ee63669009704023d1b86a19a22f81510ed7c
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 03:06:00,834 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 03:06:00,897 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 03:06:00,902 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 03:06:00,903 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 03:06:00,928 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 03:06:00,929 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 03:06:00,929 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 03:06:00,930 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 03:06:00,930 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 03:06:00,931 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 03:06:00,931 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 03:06:00,932 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 03:06:00,933 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 03:06:00,933 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 03:06:00,934 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 03:06:00,934 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 03:06:00,934 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 03:06:00,935 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 03:06:00,935 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 03:06:00,936 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 03:06:00,940 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 03:06:00,940 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 03:06:00,941 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 03:06:00,941 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 03:06:00,942 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 03:06:00,942 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 03:06:00,943 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 03:06:00,943 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 03:06:00,943 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 03:06:00,945 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 03:06:00,946 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 03:06:00,946 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 03:06:00,946 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 03:06:00,946 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 03:06:00,946 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 03:06:00,947 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 03:06:00,947 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 03:06:00,947 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 03:06:00,947 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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/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 -> e24e31822dc426b20835e6773e2ee63669009704023d1b86a19a22f81510ed7c
[2023-11-29 03:06:01,175 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 03:06:01,208 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 03:06:01,211 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 03:06:01,212 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 03:06:01,212 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 03:06:01,213 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.4.prop1-back-serstep.c
[2023-11-29 03:06:03,972 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 03:06:04,566 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 03:06:04,567 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.4.prop1-back-serstep.c
[2023-11-29 03:06:04,630 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/data/d8ec744dc/b5e78455a9e94e39b441a8efeca90981/FLAG1b2a9e7b1
[2023-11-29 03:06:05,028 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/data/d8ec744dc/b5e78455a9e94e39b441a8efeca90981
[2023-11-29 03:06:05,030 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 03:06:05,031 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 03:06:05,032 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 03:06:05,033 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 03:06:05,037 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 03:06:05,037 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:06:05" (1/1) ...
[2023-11-29 03:06:05,038 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb96655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:05, skipping insertion in model container
[2023-11-29 03:06:05,038 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:06:05" (1/1) ...
[2023-11-29 03:06:05,269 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 03:06:05,537 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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.4.prop1-back-serstep.c[1183,1196]
[2023-11-29 03:06:07,349 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 03:06:07,359 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 03:06:07,371 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_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.leader_election.4.prop1-back-serstep.c[1183,1196]
[2023-11-29 03:06:08,711 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 03:06:08,728 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 03:06:08,730 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08 WrapperNode
[2023-11-29 03:06:08,730 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 03:06:08,731 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 03:06:08,731 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 03:06:08,732 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 03:06:08,739 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:09,117 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:13,526 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68906
[2023-11-29 03:06:13,526 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 03:06:13,527 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 03:06:13,527 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 03:06:13,527 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 03:06:13,535 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:13,535 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:14,429 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:15,000 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-29 03:06:15,001 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:15,001 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:16,028 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:16,232 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:16,438 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:16,591 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:17,323 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 03:06:17,325 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 03:06:17,325 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 03:06:17,325 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 03:06:17,326 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (1/1) ...
[2023-11-29 03:06:17,332 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 03:06:17,343 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:06:17,354 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 03:06:17,356 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 03:06:17,382 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 03:06:17,382 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 03:06:17,382 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 03:06:17,382 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 03:06:19,806 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 03:06:19,809 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 03:06:47,593 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 03:06:48,445 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 03:06:48,445 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 03:06:48,453 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:06:48 BoogieIcfgContainer
[2023-11-29 03:06:48,453 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 03:06:48,456 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 03:06:48,456 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 03:06:48,459 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 03:06:48,459 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:06:05" (1/3) ...
[2023-11-29 03:06:48,460 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a61324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:06:48, skipping insertion in model container
[2023-11-29 03:06:48,460 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:06:08" (2/3) ...
[2023-11-29 03:06:48,461 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a61324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:06:48, skipping insertion in model container
[2023-11-29 03:06:48,461 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:06:48" (3/3) ...
[2023-11-29 03:06:48,462 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.leader_election.4.prop1-back-serstep.c
[2023-11-29 03:06:48,481 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 03:06:48,482 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 03:06:48,744 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 03:06:48,751 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;@51c167b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 03:06:48,751 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 03:06:48,799 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 14813 states, 14811 states have (on average 1.6685571534670178) internal successors, (24713), 14812 states have internal predecessors, (24713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:48,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1683
[2023-11-29 03:06:48,912 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:06:48,914 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:06:48,914 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:06:48,919 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:06:48,921 INFO  L85        PathProgramCache]: Analyzing trace with hash -639223263, now seen corresponding path program 1 times
[2023-11-29 03:06:48,930 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:06:48,930 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057635494]
[2023-11-29 03:06:48,931 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:06:48,932 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:06:50,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:06:56,785 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:06:56,785 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:06:56,786 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057635494]
[2023-11-29 03:06:56,786 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057635494] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:06:56,786 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:06:56,787 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:06:56,788 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062196875]
[2023-11-29 03:06:56,789 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:06:56,796 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:06:56,797 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:06:56,828 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:06:56,829 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:06:56,859 INFO  L87              Difference]: Start difference. First operand  has 14813 states, 14811 states have (on average 1.6685571534670178) internal successors, (24713), 14812 states have internal predecessors, (24713), 0 states have call successors, (0), 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 420.5) internal successors, (1682), 4 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:57,624 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:06:57,624 INFO  L93              Difference]: Finished difference Result 28944 states and 48292 transitions.
[2023-11-29 03:06:57,625 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:06:57,628 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 420.5) internal successors, (1682), 4 states have internal predecessors, (1682), 0 states have call successors, (0), 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 1682
[2023-11-29 03:06:57,637 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:06:57,726 INFO  L225             Difference]: With dead ends: 28944
[2023-11-29 03:06:57,726 INFO  L226             Difference]: Without dead ends: 14813
[2023-11-29 03:06:57,749 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:06:57,753 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 1 mSDsluCounter, 49407 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74113 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:06:57,754 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74113 Invalid, 13 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:06:57,802 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14813 states.
[2023-11-29 03:06:58,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14813 to 14813.
[2023-11-29 03:06:58,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14813 states, 14812 states have (on average 1.6683094788009722) internal successors, (24711), 14812 states have internal predecessors, (24711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:58,098 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14813 states to 14813 states and 24711 transitions.
[2023-11-29 03:06:58,099 INFO  L78                 Accepts]: Start accepts. Automaton has 14813 states and 24711 transitions. Word has length 1682
[2023-11-29 03:06:58,103 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:06:58,103 INFO  L495      AbstractCegarLoop]: Abstraction has 14813 states and 24711 transitions.
[2023-11-29 03:06:58,104 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 420.5) internal successors, (1682), 4 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:06:58,104 INFO  L276                IsEmpty]: Start isEmpty. Operand 14813 states and 24711 transitions.
[2023-11-29 03:06:58,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1684
[2023-11-29 03:06:58,170 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:06:58,171 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:06:58,171 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 03:06:58,172 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:06:58,172 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:06:58,173 INFO  L85        PathProgramCache]: Analyzing trace with hash 1660650343, now seen corresponding path program 1 times
[2023-11-29 03:06:58,173 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:06:58,174 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819843070]
[2023-11-29 03:06:58,174 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:06:58,174 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:06:58,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:01,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:01,673 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:01,673 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819843070]
[2023-11-29 03:07:01,674 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819843070] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:07:01,674 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:07:01,674 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:07:01,675 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143083578]
[2023-11-29 03:07:01,675 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:01,680 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:07:01,681 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:01,683 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:07:01,683 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:01,684 INFO  L87              Difference]: Start difference. First operand 14813 states and 24711 transitions. Second operand  has 4 states, 4 states have (on average 420.75) internal successors, (1683), 4 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:02,156 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:02,156 INFO  L93              Difference]: Finished difference Result 28947 states and 48290 transitions.
[2023-11-29 03:07:02,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:07:02,157 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 420.75) internal successors, (1683), 4 states have internal predecessors, (1683), 0 states have call successors, (0), 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 1683
[2023-11-29 03:07:02,161 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:02,228 INFO  L225             Difference]: With dead ends: 28947
[2023-11-29 03:07:02,228 INFO  L226             Difference]: Without dead ends: 14816
[2023-11-29 03:07:02,248 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:02,249 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 1 mSDsluCounter, 49405 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:02,250 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74111 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:07:02,281 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14816 states.
[2023-11-29 03:07:02,540 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14816 to 14815.
[2023-11-29 03:07:02,558 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14815 states, 14814 states have (on average 1.6682192520588632) internal successors, (24713), 14814 states have internal predecessors, (24713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:02,591 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14815 states to 14815 states and 24713 transitions.
[2023-11-29 03:07:02,591 INFO  L78                 Accepts]: Start accepts. Automaton has 14815 states and 24713 transitions. Word has length 1683
[2023-11-29 03:07:02,594 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:02,594 INFO  L495      AbstractCegarLoop]: Abstraction has 14815 states and 24713 transitions.
[2023-11-29 03:07:02,595 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 420.75) internal successors, (1683), 4 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:02,595 INFO  L276                IsEmpty]: Start isEmpty. Operand 14815 states and 24713 transitions.
[2023-11-29 03:07:02,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1685
[2023-11-29 03:07:02,622 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:02,623 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:07:02,623 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 03:07:02,623 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:02,624 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:02,625 INFO  L85        PathProgramCache]: Analyzing trace with hash 1505138045, now seen corresponding path program 1 times
[2023-11-29 03:07:02,625 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:02,625 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718032143]
[2023-11-29 03:07:02,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:02,626 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:03,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:05,781 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:05,782 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:05,782 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718032143]
[2023-11-29 03:07:05,782 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718032143] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:07:05,782 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:07:05,783 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:07:05,783 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391219927]
[2023-11-29 03:07:05,783 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:05,785 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:07:05,785 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:05,787 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:07:05,787 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:05,788 INFO  L87              Difference]: Start difference. First operand 14815 states and 24713 transitions. Second operand  has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:06,419 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:06,420 INFO  L93              Difference]: Finished difference Result 43075 states and 71858 transitions.
[2023-11-29 03:07:06,420 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 03:07:06,421 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 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 1684
[2023-11-29 03:07:06,424 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:06,459 INFO  L225             Difference]: With dead ends: 43075
[2023-11-29 03:07:06,459 INFO  L226             Difference]: Without dead ends: 28942
[2023-11-29 03:07:06,470 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-29 03:07:06,472 INFO  L413           NwaCegarLoop]: 27756 mSDtfsCounter, 23564 mSDsluCounter, 52453 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23564 SdHoareTripleChecker+Valid, 80209 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:06,473 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [23564 Valid, 80209 Invalid, 19 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:07:06,498 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28942 states.
[2023-11-29 03:07:06,684 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28942 to 14817.
[2023-11-29 03:07:06,699 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14817 states, 14816 states have (on average 1.668129049676026) internal successors, (24715), 14816 states have internal predecessors, (24715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:06,719 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14817 states to 14817 states and 24715 transitions.
[2023-11-29 03:07:06,720 INFO  L78                 Accepts]: Start accepts. Automaton has 14817 states and 24715 transitions. Word has length 1684
[2023-11-29 03:07:06,722 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:06,722 INFO  L495      AbstractCegarLoop]: Abstraction has 14817 states and 24715 transitions.
[2023-11-29 03:07:06,722 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:06,723 INFO  L276                IsEmpty]: Start isEmpty. Operand 14817 states and 24715 transitions.
[2023-11-29 03:07:06,740 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1686
[2023-11-29 03:07:06,740 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:06,741 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:07:06,741 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 03:07:06,742 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:06,742 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:06,743 INFO  L85        PathProgramCache]: Analyzing trace with hash -696057329, now seen corresponding path program 1 times
[2023-11-29 03:07:06,743 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:06,743 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611200008]
[2023-11-29 03:07:06,744 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:06,744 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:07,259 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:09,734 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:09,734 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:09,734 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611200008]
[2023-11-29 03:07:09,734 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611200008] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:07:09,734 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:07:09,735 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:07:09,735 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313588263]
[2023-11-29 03:07:09,735 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:09,737 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:07:09,737 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:09,738 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:07:09,739 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 03:07:09,739 INFO  L87              Difference]: Start difference. First operand 14817 states and 24715 transitions. Second operand  has 5 states, 5 states have (on average 337.0) internal successors, (1685), 4 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:10,605 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:10,605 INFO  L93              Difference]: Finished difference Result 44911 states and 74914 transitions.
[2023-11-29 03:07:10,605 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:07:10,606 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 337.0) internal successors, (1685), 4 states have internal predecessors, (1685), 0 states have call successors, (0), 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 1685
[2023-11-29 03:07:10,610 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:10,656 INFO  L225             Difference]: With dead ends: 44911
[2023-11-29 03:07:10,656 INFO  L226             Difference]: Without dead ends: 30776
[2023-11-29 03:07:10,679 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 03:07:10,681 INFO  L413           NwaCegarLoop]: 27755 mSDtfsCounter, 96778 mSDsluCounter, 49406 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96778 SdHoareTripleChecker+Valid, 77161 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:10,681 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [96778 Valid, 77161 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:07:10,726 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30776 states.
[2023-11-29 03:07:11,090 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30776 to 16647.
[2023-11-29 03:07:11,111 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16647 states, 16646 states have (on average 1.6679682806680283) internal successors, (27765), 16646 states have internal predecessors, (27765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:11,149 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16647 states to 16647 states and 27765 transitions.
[2023-11-29 03:07:11,150 INFO  L78                 Accepts]: Start accepts. Automaton has 16647 states and 27765 transitions. Word has length 1685
[2023-11-29 03:07:11,152 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:11,152 INFO  L495      AbstractCegarLoop]: Abstraction has 16647 states and 27765 transitions.
[2023-11-29 03:07:11,153 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 337.0) internal successors, (1685), 4 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:11,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 16647 states and 27765 transitions.
[2023-11-29 03:07:12,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:07:12,298 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:12,304 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]
[2023-11-29 03:07:12,305 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 03:07:12,305 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:12,305 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:12,309 INFO  L85        PathProgramCache]: Analyzing trace with hash 1154062279, now seen corresponding path program 1 times
[2023-11-29 03:07:12,309 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:12,309 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734690084]
[2023-11-29 03:07:12,310 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:12,310 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:13,611 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:07:13,611 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694481919]
[2023-11-29 03:07:13,614 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:13,614 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:13,615 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:07:13,616 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:07:13,618 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 03:07:31,509 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:31,885 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56983 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:07:32,180 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:07:32,751 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:32,751 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:07:32,752 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:32,752 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734690084]
[2023-11-29 03:07:32,752 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:07:32,752 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694481919]
[2023-11-29 03:07:32,753 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [694481919] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:07:32,753 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:07:32,756 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:07:32,757 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905828950]
[2023-11-29 03:07:32,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:32,778 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:07:32,778 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:32,793 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:07:32,794 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:32,799 INFO  L87              Difference]: Start difference. First operand 16647 states and 27765 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:33,501 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:33,501 INFO  L93              Difference]: Finished difference Result 30792 states and 51360 transitions.
[2023-11-29 03:07:33,502 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:07:33,504 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:07:33,506 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:33,527 INFO  L225             Difference]: With dead ends: 30792
[2023-11-29 03:07:33,527 INFO  L226             Difference]: Without dead ends: 16657
[2023-11-29 03:07:33,535 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:33,536 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:33,537 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:07:33,561 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16657 states.
[2023-11-29 03:07:33,745 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16657 to 16649.
[2023-11-29 03:07:33,761 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16649 states, 16648 states have (on average 1.6678880345987506) internal successors, (27767), 16648 states have internal predecessors, (27767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:33,788 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16649 states to 16649 states and 27767 transitions.
[2023-11-29 03:07:33,788 INFO  L78                 Accepts]: Start accepts. Automaton has 16649 states and 27767 transitions. Word has length 10964
[2023-11-29 03:07:33,793 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:33,794 INFO  L495      AbstractCegarLoop]: Abstraction has 16649 states and 27767 transitions.
[2023-11-29 03:07:33,796 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:33,797 INFO  L276                IsEmpty]: Start isEmpty. Operand 16649 states and 27767 transitions.
[2023-11-29 03:07:34,459 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:07:34,460 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:34,465 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:07:34,609 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 03:07:34,665 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:34,666 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:34,666 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:34,670 INFO  L85        PathProgramCache]: Analyzing trace with hash 751173433, now seen corresponding path program 1 times
[2023-11-29 03:07:34,670 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:34,670 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729292698]
[2023-11-29 03:07:34,671 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:34,671 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:35,797 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:07:35,797 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367406103]
[2023-11-29 03:07:35,799 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:35,800 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:35,800 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:07:35,801 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:07:35,802 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 03:07:52,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:07:53,173 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56984 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:07:53,330 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:07:53,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:07:53,599 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:07:53,599 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:07:53,599 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729292698]
[2023-11-29 03:07:53,599 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:07:53,599 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367406103]
[2023-11-29 03:07:53,599 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367406103] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:07:53,599 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:07:53,602 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:07:53,602 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611374868]
[2023-11-29 03:07:53,602 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:07:53,610 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:07:53,611 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:07:53,618 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:07:53,619 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:53,622 INFO  L87              Difference]: Start difference. First operand 16649 states and 27767 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:54,125 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:07:54,125 INFO  L93              Difference]: Finished difference Result 30795 states and 51362 transitions.
[2023-11-29 03:07:54,126 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:07:54,128 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:07:54,130 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:07:54,149 INFO  L225             Difference]: With dead ends: 30795
[2023-11-29 03:07:54,149 INFO  L226             Difference]: Without dead ends: 16658
[2023-11-29 03:07:54,157 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:07:54,158 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:07:54,158 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:07:54,177 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16658 states.
[2023-11-29 03:07:54,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16658 to 16650.
[2023-11-29 03:07:54,344 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16650 states, 16649 states have (on average 1.6678479187939215) internal successors, (27768), 16649 states have internal predecessors, (27768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:54,363 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 27768 transitions.
[2023-11-29 03:07:54,363 INFO  L78                 Accepts]: Start accepts. Automaton has 16650 states and 27768 transitions. Word has length 10964
[2023-11-29 03:07:54,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:07:54,366 INFO  L495      AbstractCegarLoop]: Abstraction has 16650 states and 27768 transitions.
[2023-11-29 03:07:54,368 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:07:54,368 INFO  L276                IsEmpty]: Start isEmpty. Operand 16650 states and 27768 transitions.
[2023-11-29 03:07:54,856 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:07:54,856 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:07:54,861 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]
[2023-11-29 03:07:55,011 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 03:07:55,062 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:55,062 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:07:55,062 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:07:55,067 INFO  L85        PathProgramCache]: Analyzing trace with hash 1829553067, now seen corresponding path program 1 times
[2023-11-29 03:07:55,067 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:07:55,067 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534082791]
[2023-11-29 03:07:55,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:55,068 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:07:56,128 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:07:56,128 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26278446]
[2023-11-29 03:07:56,130 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:07:56,130 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:07:56,131 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:07:56,131 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:07:56,132 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 03:08:13,514 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:08:13,903 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56985 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:08:14,071 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:08:14,251 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:08:14,251 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:08:14,251 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:08:14,251 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534082791]
[2023-11-29 03:08:14,251 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:08:14,252 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26278446]
[2023-11-29 03:08:14,252 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [26278446] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:08:14,252 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:08:14,254 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:08:14,255 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139641429]
[2023-11-29 03:08:14,255 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:08:14,262 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:08:14,263 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:08:14,270 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:08:14,270 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:08:14,273 INFO  L87              Difference]: Start difference. First operand 16650 states and 27768 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:14,757 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:08:14,757 INFO  L93              Difference]: Finished difference Result 30797 states and 51364 transitions.
[2023-11-29 03:08:14,758 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:08:14,760 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:08:14,762 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:08:14,776 INFO  L225             Difference]: With dead ends: 30797
[2023-11-29 03:08:14,776 INFO  L226             Difference]: Without dead ends: 16659
[2023-11-29 03:08:14,784 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:08:14,784 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:08:14,784 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:08:14,803 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16659 states.
[2023-11-29 03:08:14,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16659 to 16651.
[2023-11-29 03:08:14,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16651 states, 16650 states have (on average 1.6678078078078078) internal successors, (27769), 16650 states have internal predecessors, (27769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:14,961 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16651 states to 16651 states and 27769 transitions.
[2023-11-29 03:08:14,961 INFO  L78                 Accepts]: Start accepts. Automaton has 16651 states and 27769 transitions. Word has length 10964
[2023-11-29 03:08:14,964 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:08:14,964 INFO  L495      AbstractCegarLoop]: Abstraction has 16651 states and 27769 transitions.
[2023-11-29 03:08:14,966 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:14,966 INFO  L276                IsEmpty]: Start isEmpty. Operand 16651 states and 27769 transitions.
[2023-11-29 03:08:15,442 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:08:15,442 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:08:15,448 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]
[2023-11-29 03:08:15,582 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 03:08:15,648 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:15,649 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:08:15,649 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:08:15,652 INFO  L85        PathProgramCache]: Analyzing trace with hash -1431634659, now seen corresponding path program 1 times
[2023-11-29 03:08:15,652 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:08:15,653 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511617555]
[2023-11-29 03:08:15,653 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:15,654 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:08:16,654 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:08:16,654 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604499987]
[2023-11-29 03:08:16,656 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:16,656 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:16,656 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:08:16,657 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:08:16,659 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 03:08:33,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:08:33,596 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56986 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:08:33,807 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:08:34,287 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:08:34,287 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:08:34,288 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:08:34,288 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511617555]
[2023-11-29 03:08:34,288 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:08:34,288 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604499987]
[2023-11-29 03:08:34,288 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604499987] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:08:34,288 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:08:34,291 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:08:34,291 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199345022]
[2023-11-29 03:08:34,291 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:08:34,299 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:08:34,299 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:08:34,307 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:08:34,307 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:08:34,310 INFO  L87              Difference]: Start difference. First operand 16651 states and 27769 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:34,659 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:08:34,659 INFO  L93              Difference]: Finished difference Result 30799 states and 51366 transitions.
[2023-11-29 03:08:34,660 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:08:34,663 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:08:34,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:08:34,678 INFO  L225             Difference]: With dead ends: 30799
[2023-11-29 03:08:34,678 INFO  L226             Difference]: Without dead ends: 16660
[2023-11-29 03:08:34,689 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:08:34,690 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:08:34,691 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:08:34,712 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16660 states.
[2023-11-29 03:08:34,868 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16660 to 16652.
[2023-11-29 03:08:34,885 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16652 states, 16651 states have (on average 1.6677677016395411) internal successors, (27770), 16651 states have internal predecessors, (27770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:34,903 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 27770 transitions.
[2023-11-29 03:08:34,904 INFO  L78                 Accepts]: Start accepts. Automaton has 16652 states and 27770 transitions. Word has length 10964
[2023-11-29 03:08:34,906 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:08:34,906 INFO  L495      AbstractCegarLoop]: Abstraction has 16652 states and 27770 transitions.
[2023-11-29 03:08:34,909 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:34,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 16652 states and 27770 transitions.
[2023-11-29 03:08:35,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:08:35,593 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:08:35,598 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:08:35,728 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 03:08:35,798 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:35,798 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:08:35,799 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:08:35,802 INFO  L85        PathProgramCache]: Analyzing trace with hash 1893766031, now seen corresponding path program 1 times
[2023-11-29 03:08:35,802 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:08:35,802 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900828493]
[2023-11-29 03:08:35,803 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:35,803 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:08:36,715 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:08:36,715 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193390775]
[2023-11-29 03:08:36,717 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:36,717 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:36,717 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:08:36,718 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:08:36,719 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 03:08:53,876 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:08:54,206 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56987 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:08:54,334 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:08:54,522 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:08:54,522 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:08:54,523 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:08:54,523 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900828493]
[2023-11-29 03:08:54,523 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:08:54,523 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193390775]
[2023-11-29 03:08:54,523 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193390775] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:08:54,523 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:08:54,527 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:08:54,527 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368792148]
[2023-11-29 03:08:54,527 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:08:54,535 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:08:54,535 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:08:54,542 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:08:54,542 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:08:54,545 INFO  L87              Difference]: Start difference. First operand 16652 states and 27770 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:54,869 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:08:54,869 INFO  L93              Difference]: Finished difference Result 30801 states and 51368 transitions.
[2023-11-29 03:08:54,870 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:08:54,873 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:08:54,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:08:54,886 INFO  L225             Difference]: With dead ends: 30801
[2023-11-29 03:08:54,887 INFO  L226             Difference]: Without dead ends: 16661
[2023-11-29 03:08:54,895 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:08:54,895 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:08:54,895 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:08:54,914 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16661 states.
[2023-11-29 03:08:55,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16661 to 16653.
[2023-11-29 03:08:55,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16653 states, 16652 states have (on average 1.6677276002882537) internal successors, (27771), 16652 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:55,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16653 states to 16653 states and 27771 transitions.
[2023-11-29 03:08:55,068 INFO  L78                 Accepts]: Start accepts. Automaton has 16653 states and 27771 transitions. Word has length 10964
[2023-11-29 03:08:55,069 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:08:55,069 INFO  L495      AbstractCegarLoop]: Abstraction has 16653 states and 27771 transitions.
[2023-11-29 03:08:55,072 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:08:55,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 16653 states and 27771 transitions.
[2023-11-29 03:08:55,724 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:08:55,724 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:08:55,726 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]
[2023-11-29 03:08:55,865 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 03:08:55,927 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-11-29 03:08:55,927 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:08:55,928 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:08:55,931 INFO  L85        PathProgramCache]: Analyzing trace with hash 1163161601, now seen corresponding path program 1 times
[2023-11-29 03:08:55,931 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:08:55,931 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845475134]
[2023-11-29 03:08:55,933 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:55,933 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:08:56,900 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:08:56,901 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903011600]
[2023-11-29 03:08:56,902 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:08:56,903 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:08:56,903 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:08:56,904 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:08:56,904 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 03:09:14,426 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:09:14,748 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56988 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:09:14,867 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:09:15,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:09:15,028 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:09:15,028 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:09:15,028 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845475134]
[2023-11-29 03:09:15,028 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:09:15,028 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903011600]
[2023-11-29 03:09:15,028 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [903011600] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:09:15,028 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:09:15,031 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:09:15,031 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796869907]
[2023-11-29 03:09:15,031 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:09:15,039 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:09:15,040 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:09:15,048 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:09:15,048 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:09:15,051 INFO  L87              Difference]: Start difference. First operand 16653 states and 27771 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:15,364 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:09:15,364 INFO  L93              Difference]: Finished difference Result 30803 states and 51370 transitions.
[2023-11-29 03:09:15,365 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:09:15,367 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:09:15,369 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:09:15,381 INFO  L225             Difference]: With dead ends: 30803
[2023-11-29 03:09:15,381 INFO  L226             Difference]: Without dead ends: 16662
[2023-11-29 03:09:15,388 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:09:15,388 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:09:15,388 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:09:15,494 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16662 states.
[2023-11-29 03:09:15,594 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16662 to 16654.
[2023-11-29 03:09:15,607 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16654 states, 16653 states have (on average 1.6676875037530776) internal successors, (27772), 16653 states have internal predecessors, (27772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:15,624 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16654 states to 16654 states and 27772 transitions.
[2023-11-29 03:09:15,624 INFO  L78                 Accepts]: Start accepts. Automaton has 16654 states and 27772 transitions. Word has length 10964
[2023-11-29 03:09:15,626 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:09:15,626 INFO  L495      AbstractCegarLoop]: Abstraction has 16654 states and 27772 transitions.
[2023-11-29 03:09:15,629 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:15,629 INFO  L276                IsEmpty]: Start isEmpty. Operand 16654 states and 27772 transitions.
[2023-11-29 03:09:16,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:09:16,245 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:09:16,247 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:09:16,390 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 03:09:16,447 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:16,448 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:09:16,448 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:09:16,450 INFO  L85        PathProgramCache]: Analyzing trace with hash 660502387, now seen corresponding path program 1 times
[2023-11-29 03:09:16,450 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:09:16,450 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590123473]
[2023-11-29 03:09:16,451 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:16,451 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:09:17,404 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:09:17,404 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541586817]
[2023-11-29 03:09:17,406 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:17,406 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:17,406 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:09:17,407 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:09:17,407 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 03:09:34,462 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:09:34,799 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56989 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:09:35,018 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:09:35,172 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:09:35,172 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:09:35,172 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:09:35,172 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590123473]
[2023-11-29 03:09:35,172 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:09:35,172 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541586817]
[2023-11-29 03:09:35,172 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [541586817] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:09:35,172 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:09:35,176 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:09:35,176 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619351407]
[2023-11-29 03:09:35,177 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:09:35,184 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:09:35,185 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:09:35,190 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:09:35,190 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:09:35,193 INFO  L87              Difference]: Start difference. First operand 16654 states and 27772 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:35,503 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:09:35,503 INFO  L93              Difference]: Finished difference Result 30805 states and 51372 transitions.
[2023-11-29 03:09:35,504 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:09:35,506 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:09:35,508 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:09:35,520 INFO  L225             Difference]: With dead ends: 30805
[2023-11-29 03:09:35,520 INFO  L226             Difference]: Without dead ends: 16663
[2023-11-29 03:09:35,527 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:09:35,528 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:09:35,528 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:09:35,544 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16663 states.
[2023-11-29 03:09:35,652 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16663 to 16655.
[2023-11-29 03:09:35,666 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16655 states, 16654 states have (on average 1.6676474120331453) internal successors, (27773), 16654 states have internal predecessors, (27773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:35,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16655 states to 16655 states and 27773 transitions.
[2023-11-29 03:09:35,682 INFO  L78                 Accepts]: Start accepts. Automaton has 16655 states and 27773 transitions. Word has length 10964
[2023-11-29 03:09:35,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:09:35,684 INFO  L495      AbstractCegarLoop]: Abstraction has 16655 states and 27773 transitions.
[2023-11-29 03:09:35,686 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:35,686 INFO  L276                IsEmpty]: Start isEmpty. Operand 16655 states and 27773 transitions.
[2023-11-29 03:09:36,293 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:09:36,294 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:09:36,296 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:09:36,429 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-11-29 03:09:36,496 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:36,496 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:09:36,497 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:09:36,498 INFO  L85        PathProgramCache]: Analyzing trace with hash -1968549659, now seen corresponding path program 1 times
[2023-11-29 03:09:36,499 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:09:36,499 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999448206]
[2023-11-29 03:09:36,499 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:36,500 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:09:37,434 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:09:37,434 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359244470]
[2023-11-29 03:09:37,436 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:37,436 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:37,436 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:09:37,437 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:09:37,437 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 03:09:54,521 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:09:54,894 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56990 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:09:55,006 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:09:55,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:09:55,168 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:09:55,169 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:09:55,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999448206]
[2023-11-29 03:09:55,169 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:09:55,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359244470]
[2023-11-29 03:09:55,169 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [359244470] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:09:55,169 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:09:55,173 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:09:55,173 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36807292]
[2023-11-29 03:09:55,173 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:09:55,178 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:09:55,178 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:09:55,184 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:09:55,184 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:09:55,187 INFO  L87              Difference]: Start difference. First operand 16655 states and 27773 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:55,632 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:09:55,633 INFO  L93              Difference]: Finished difference Result 30807 states and 51374 transitions.
[2023-11-29 03:09:55,633 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:09:55,635 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:09:55,637 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:09:55,645 INFO  L225             Difference]: With dead ends: 30807
[2023-11-29 03:09:55,645 INFO  L226             Difference]: Without dead ends: 16664
[2023-11-29 03:09:55,649 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:09:55,649 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:09:55,650 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:09:55,664 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16664 states.
[2023-11-29 03:09:55,763 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16664 to 16656.
[2023-11-29 03:09:55,778 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16656 states, 16655 states have (on average 1.6676073251275894) internal successors, (27774), 16655 states have internal predecessors, (27774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:55,798 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16656 states to 16656 states and 27774 transitions.
[2023-11-29 03:09:55,798 INFO  L78                 Accepts]: Start accepts. Automaton has 16656 states and 27774 transitions. Word has length 10964
[2023-11-29 03:09:55,800 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:09:55,800 INFO  L495      AbstractCegarLoop]: Abstraction has 16656 states and 27774 transitions.
[2023-11-29 03:09:55,802 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:09:55,802 INFO  L276                IsEmpty]: Start isEmpty. Operand 16656 states and 27774 transitions.
[2023-11-29 03:09:56,327 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:09:56,327 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:09:56,330 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]
[2023-11-29 03:09:56,477 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-29 03:09:56,530 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:56,531 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:09:56,531 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:09:56,533 INFO  L85        PathProgramCache]: Analyzing trace with hash -727873705, now seen corresponding path program 1 times
[2023-11-29 03:09:56,534 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:09:56,534 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764613926]
[2023-11-29 03:09:56,535 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:56,535 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:09:57,525 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:09:57,525 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99680580]
[2023-11-29 03:09:57,527 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:09:57,527 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:09:57,527 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:09:57,528 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:09:57,529 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 03:10:15,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:10:15,883 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56991 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 03:10:16,003 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:10:16,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 03:10:16,160 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 03:10:16,160 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:10:16,160 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764613926]
[2023-11-29 03:10:16,160 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:10:16,160 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99680580]
[2023-11-29 03:10:16,160 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [99680580] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 03:10:16,160 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 03:10:16,163 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 03:10:16,163 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81851495]
[2023-11-29 03:10:16,163 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:10:16,168 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 03:10:16,169 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:10:16,174 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 03:10:16,174 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:10:16,177 INFO  L87              Difference]: Start difference. First operand 16656 states and 27774 transitions. Second operand  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:16,637 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:10:16,637 INFO  L93              Difference]: Finished difference Result 30809 states and 51376 transitions.
[2023-11-29 03:10:16,638 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 03:10:16,640 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 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 10964
[2023-11-29 03:10:16,642 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:10:16,652 INFO  L225             Difference]: With dead ends: 30809
[2023-11-29 03:10:16,652 INFO  L226             Difference]: Without dead ends: 16665
[2023-11-29 03:10:16,659 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10963 GetRequests, 10961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 03:10:16,659 INFO  L413           NwaCegarLoop]: 24706 mSDtfsCounter, 12 mSDsluCounter, 49402 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74108 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:10:16,660 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74108 Invalid, 17 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 03:10:16,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16665 states.
[2023-11-29 03:10:16,800 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16665 to 16657.
[2023-11-29 03:10:16,815 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16657 states, 16656 states have (on average 1.6675672430355428) internal successors, (27775), 16656 states have internal predecessors, (27775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:16,835 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16657 states to 16657 states and 27775 transitions.
[2023-11-29 03:10:16,835 INFO  L78                 Accepts]: Start accepts. Automaton has 16657 states and 27775 transitions. Word has length 10964
[2023-11-29 03:10:16,837 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:10:16,837 INFO  L495      AbstractCegarLoop]: Abstraction has 16657 states and 27775 transitions.
[2023-11-29 03:10:16,839 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2741.0) internal successors, (10964), 4 states have internal predecessors, (10964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:16,839 INFO  L276                IsEmpty]: Start isEmpty. Operand 16657 states and 27775 transitions.
[2023-11-29 03:10:17,374 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10965
[2023-11-29 03:10:17,375 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:10:17,377 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:10:17,539 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 03:10:17,578 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 03:10:17,578 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:10:17,578 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:10:17,580 INFO  L85        PathProgramCache]: Analyzing trace with hash -1755499831, now seen corresponding path program 1 times
[2023-11-29 03:10:17,581 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:10:17,581 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233536650]
[2023-11-29 03:10:17,582 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:17,582 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:10:18,552 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:10:18,553 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771555976]
[2023-11-29 03:10:18,555 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:18,555 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:10:18,555 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:10:18,556 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:10:18,557 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 03:10:36,133 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:10:36,504 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56992 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:10:36,713 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:10:38,230 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 8 proven. 939 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked.
[2023-11-29 03:10:38,230 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:10:38,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked.
[2023-11-29 03:10:38,525 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:10:38,525 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233536650]
[2023-11-29 03:10:38,525 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:10:38,526 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771555976]
[2023-11-29 03:10:38,526 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [771555976] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:10:38,526 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:10:38,533 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:10:38,534 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261852799]
[2023-11-29 03:10:38,534 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:10:38,540 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:10:38,540 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:10:38,545 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:10:38,546 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:10:38,548 INFO  L87              Difference]: Start difference. First operand 16657 states and 27775 transitions. Second operand  has 5 states, 5 states have (on average 1949.4) internal successors, (9747), 5 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:56,041 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:10:56,041 INFO  L93              Difference]: Finished difference Result 57666 states and 95697 transitions.
[2023-11-29 03:10:56,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:10:56,043 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1949.4) internal successors, (9747), 5 states have internal predecessors, (9747), 0 states have call successors, (0), 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 10964
[2023-11-29 03:10:56,050 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:10:56,071 INFO  L225             Difference]: With dead ends: 57666
[2023-11-29 03:10:56,071 INFO  L226             Difference]: Without dead ends: 30795
[2023-11-29 03:10:56,080 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21927 GetRequests, 21918 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:10:56,080 INFO  L413           NwaCegarLoop]: 39991 mSDtfsCounter, 62196 mSDsluCounter, 39453 mSDsCounter, 0 mSdLazyCounter, 20093 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62196 SdHoareTripleChecker+Valid, 79444 SdHoareTripleChecker+Invalid, 21508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 20093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-29 03:10:56,080 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [62196 Valid, 79444 Invalid, 21508 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1415 Valid, 20093 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-29 03:10:56,108 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30795 states.
[2023-11-29 03:10:56,264 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30795 to 16659.
[2023-11-29 03:10:56,279 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16659 states, 16658 states have (on average 1.66748709328851) internal successors, (27777), 16658 states have internal predecessors, (27777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:56,299 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16659 states to 16659 states and 27777 transitions.
[2023-11-29 03:10:56,299 INFO  L78                 Accepts]: Start accepts. Automaton has 16659 states and 27777 transitions. Word has length 10964
[2023-11-29 03:10:56,304 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:10:56,304 INFO  L495      AbstractCegarLoop]: Abstraction has 16659 states and 27777 transitions.
[2023-11-29 03:10:56,306 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1949.4) internal successors, (9747), 5 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:10:56,306 INFO  L276                IsEmpty]: Start isEmpty. Operand 16659 states and 27777 transitions.
[2023-11-29 03:10:56,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10966
[2023-11-29 03:10:56,837 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:10:56,839 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:10:57,009 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 03:10:57,039 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 03:10:57,039 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:10:57,040 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:10:57,042 INFO  L85        PathProgramCache]: Analyzing trace with hash 1215287005, now seen corresponding path program 1 times
[2023-11-29 03:10:57,042 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:10:57,042 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550256978]
[2023-11-29 03:10:57,043 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:57,043 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:10:58,084 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:10:58,085 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332227864]
[2023-11-29 03:10:58,086 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:10:58,087 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:10:58,087 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:10:58,087 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:10:58,088 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 03:11:16,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:11:16,895 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56995 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:11:17,051 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:11:18,419 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 10 proven. 939 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked.
[2023-11-29 03:11:18,419 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:11:18,652 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked.
[2023-11-29 03:11:18,652 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:11:18,652 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550256978]
[2023-11-29 03:11:18,652 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:11:18,652 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332227864]
[2023-11-29 03:11:18,652 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [332227864] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:11:18,652 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:11:18,658 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:11:18,658 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369013733]
[2023-11-29 03:11:18,658 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:11:18,664 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:11:18,664 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:11:18,669 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:11:18,669 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:11:18,672 INFO  L87              Difference]: Start difference. First operand 16659 states and 27777 transitions. Second operand  has 5 states, 5 states have (on average 1950.0) internal successors, (9750), 5 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:36,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:11:36,074 INFO  L93              Difference]: Finished difference Result 57674 states and 95705 transitions.
[2023-11-29 03:11:36,074 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:11:36,076 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1950.0) internal successors, (9750), 5 states have internal predecessors, (9750), 0 states have call successors, (0), 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 10965
[2023-11-29 03:11:36,083 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:11:36,101 INFO  L225             Difference]: With dead ends: 57674
[2023-11-29 03:11:36,102 INFO  L226             Difference]: Without dead ends: 30796
[2023-11-29 03:11:36,109 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21929 GetRequests, 21920 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:11:36,110 INFO  L413           NwaCegarLoop]: 39983 mSDtfsCounter, 62188 mSDsluCounter, 39448 mSDsCounter, 0 mSdLazyCounter, 20093 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62188 SdHoareTripleChecker+Valid, 79431 SdHoareTripleChecker+Invalid, 21508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 20093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-29 03:11:36,110 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [62188 Valid, 79431 Invalid, 21508 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1415 Valid, 20093 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-29 03:11:36,133 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30796 states.
[2023-11-29 03:11:36,276 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30796 to 16661.
[2023-11-29 03:11:36,291 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16661 states, 16660 states have (on average 1.667406962785114) internal successors, (27779), 16660 states have internal predecessors, (27779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:36,310 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16661 states to 16661 states and 27779 transitions.
[2023-11-29 03:11:36,310 INFO  L78                 Accepts]: Start accepts. Automaton has 16661 states and 27779 transitions. Word has length 10965
[2023-11-29 03:11:36,315 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:11:36,315 INFO  L495      AbstractCegarLoop]: Abstraction has 16661 states and 27779 transitions.
[2023-11-29 03:11:36,317 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1950.0) internal successors, (9750), 5 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:11:36,317 INFO  L276                IsEmpty]: Start isEmpty. Operand 16661 states and 27779 transitions.
[2023-11-29 03:11:36,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10967
[2023-11-29 03:11:36,842 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:11:36,844 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]
[2023-11-29 03:11:37,003 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 03:11:37,044 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 03:11:37,045 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:11:37,045 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:11:37,047 INFO  L85        PathProgramCache]: Analyzing trace with hash -1440811409, now seen corresponding path program 1 times
[2023-11-29 03:11:37,047 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:11:37,047 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388510898]
[2023-11-29 03:11:37,048 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:37,048 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:11:38,009 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:11:38,009 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917994510]
[2023-11-29 03:11:38,011 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:11:38,011 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:11:38,011 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:11:38,012 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:11:38,013 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 03:11:55,318 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:11:55,683 INFO  L262         TraceCheckSpWp]: Trace formula consists of 56998 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:11:55,820 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:11:57,401 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 12 proven. 939 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked.
[2023-11-29 03:11:57,402 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:11:57,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1214 trivial. 0 not checked.
[2023-11-29 03:11:57,579 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:11:57,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388510898]
[2023-11-29 03:11:57,579 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:11:57,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917994510]
[2023-11-29 03:11:57,579 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917994510] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:11:57,579 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:11:57,587 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:11:57,587 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380981882]
[2023-11-29 03:11:57,587 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:11:57,593 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:11:57,593 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:11:57,598 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:11:57,599 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:11:57,601 INFO  L87              Difference]: Start difference. First operand 16661 states and 27779 transitions. Second operand  has 5 states, 5 states have (on average 1950.6) internal successors, (9753), 5 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:16,880 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:12:16,880 INFO  L93              Difference]: Finished difference Result 57682 states and 95713 transitions.
[2023-11-29 03:12:16,880 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:12:16,882 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1950.6) internal successors, (9753), 5 states have internal predecessors, (9753), 0 states have call successors, (0), 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 10966
[2023-11-29 03:12:16,891 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:12:16,920 INFO  L225             Difference]: With dead ends: 57682
[2023-11-29 03:12:16,920 INFO  L226             Difference]: Without dead ends: 30797
[2023-11-29 03:12:16,930 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21931 GetRequests, 21922 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:12:16,931 INFO  L413           NwaCegarLoop]: 39975 mSDtfsCounter, 42870 mSDsluCounter, 57335 mSDsCounter, 0 mSdLazyCounter, 25757 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42870 SdHoareTripleChecker+Valid, 97310 SdHoareTripleChecker+Invalid, 27172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 25757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time
[2023-11-29 03:12:16,931 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42870 Valid, 97310 Invalid, 27172 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1415 Valid, 25757 Invalid, 0 Unknown, 0 Unchecked, 18.2s Time]
[2023-11-29 03:12:16,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30797 states.
[2023-11-29 03:12:17,163 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 16663.
[2023-11-29 03:12:17,179 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16663 states, 16662 states have (on average 1.6673268515184252) internal successors, (27781), 16662 states have internal predecessors, (27781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:17,209 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16663 states to 16663 states and 27781 transitions.
[2023-11-29 03:12:17,209 INFO  L78                 Accepts]: Start accepts. Automaton has 16663 states and 27781 transitions. Word has length 10966
[2023-11-29 03:12:17,216 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:12:17,216 INFO  L495      AbstractCegarLoop]: Abstraction has 16663 states and 27781 transitions.
[2023-11-29 03:12:17,218 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1950.6) internal successors, (9753), 5 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:17,218 INFO  L276                IsEmpty]: Start isEmpty. Operand 16663 states and 27781 transitions.
[2023-11-29 03:12:17,839 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10968
[2023-11-29 03:12:17,839 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:12:17,841 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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[2023-11-29 03:12:17,999 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 03:12:18,042 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 03:12:18,042 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:12:18,043 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:12:18,046 INFO  L85        PathProgramCache]: Analyzing trace with hash 1209592249, now seen corresponding path program 1 times
[2023-11-29 03:12:18,046 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:12:18,046 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408367668]
[2023-11-29 03:12:18,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:18,047 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:12:18,995 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:12:18,995 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085373472]
[2023-11-29 03:12:18,997 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:18,997 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:12:18,997 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:12:18,998 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:12:18,999 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 03:12:37,076 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:12:37,471 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57002 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:12:37,627 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:12:39,145 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 14 proven. 939 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked.
[2023-11-29 03:12:39,146 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:12:39,366 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked.
[2023-11-29 03:12:39,366 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:12:39,366 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408367668]
[2023-11-29 03:12:39,367 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:12:39,367 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085373472]
[2023-11-29 03:12:39,367 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085373472] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:12:39,367 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:12:39,375 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:12:39,375 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273161735]
[2023-11-29 03:12:39,375 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:12:39,383 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:12:39,383 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:12:39,391 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:12:39,391 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:12:39,394 INFO  L87              Difference]: Start difference. First operand 16663 states and 27781 transitions. Second operand  has 5 states, 5 states have (on average 1951.2) internal successors, (9756), 5 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:58,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:12:58,745 INFO  L93              Difference]: Finished difference Result 57690 states and 95721 transitions.
[2023-11-29 03:12:58,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:12:58,747 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1951.2) internal successors, (9756), 5 states have internal predecessors, (9756), 0 states have call successors, (0), 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 10967
[2023-11-29 03:12:58,754 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:12:58,773 INFO  L225             Difference]: With dead ends: 57690
[2023-11-29 03:12:58,773 INFO  L226             Difference]: Without dead ends: 30798
[2023-11-29 03:12:58,782 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21933 GetRequests, 21924 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:12:58,783 INFO  L413           NwaCegarLoop]: 39967 mSDtfsCounter, 42865 mSDsluCounter, 57327 mSDsCounter, 0 mSdLazyCounter, 25757 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42865 SdHoareTripleChecker+Valid, 97294 SdHoareTripleChecker+Invalid, 27172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 25757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time
[2023-11-29 03:12:58,783 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42865 Valid, 97294 Invalid, 27172 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1415 Valid, 25757 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time]
[2023-11-29 03:12:58,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30798 states.
[2023-11-29 03:12:58,947 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30798 to 16665.
[2023-11-29 03:12:58,962 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16665 states, 16664 states have (on average 1.667246759481517) internal successors, (27783), 16664 states have internal predecessors, (27783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:58,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16665 states to 16665 states and 27783 transitions.
[2023-11-29 03:12:58,981 INFO  L78                 Accepts]: Start accepts. Automaton has 16665 states and 27783 transitions. Word has length 10967
[2023-11-29 03:12:58,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:12:58,985 INFO  L495      AbstractCegarLoop]: Abstraction has 16665 states and 27783 transitions.
[2023-11-29 03:12:58,987 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1951.2) internal successors, (9756), 5 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:12:58,987 INFO  L276                IsEmpty]: Start isEmpty. Operand 16665 states and 27783 transitions.
[2023-11-29 03:12:59,577 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10969
[2023-11-29 03:12:59,577 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:12:59,579 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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[2023-11-29 03:12:59,749 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 03:12:59,779 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 03:12:59,780 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:12:59,781 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:12:59,782 INFO  L85        PathProgramCache]: Analyzing trace with hash 1329594263, now seen corresponding path program 1 times
[2023-11-29 03:12:59,782 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:12:59,782 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025063101]
[2023-11-29 03:12:59,783 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:12:59,783 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:13:00,763 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:13:00,763 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628668419]
[2023-11-29 03:13:00,765 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:00,765 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:13:00,766 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:13:00,766 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:13:00,767 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 03:13:18,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:13:18,872 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57005 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:13:19,249 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:13:20,623 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 16 proven. 939 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked.
[2023-11-29 03:13:20,624 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:13:20,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked.
[2023-11-29 03:13:20,809 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:13:20,809 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025063101]
[2023-11-29 03:13:20,809 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:13:20,809 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628668419]
[2023-11-29 03:13:20,809 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [628668419] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:13:20,809 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:13:20,815 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:13:20,815 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471828825]
[2023-11-29 03:13:20,815 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:13:20,822 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:13:20,822 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:13:20,828 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:13:20,828 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:13:20,830 INFO  L87              Difference]: Start difference. First operand 16665 states and 27783 transitions. Second operand  has 5 states, 5 states have (on average 1951.8) internal successors, (9759), 5 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:41,301 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:13:41,301 INFO  L93              Difference]: Finished difference Result 57698 states and 95729 transitions.
[2023-11-29 03:13:41,302 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:13:41,304 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1951.8) internal successors, (9759), 5 states have internal predecessors, (9759), 0 states have call successors, (0), 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 10968
[2023-11-29 03:13:41,311 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:13:41,332 INFO  L225             Difference]: With dead ends: 57698
[2023-11-29 03:13:41,332 INFO  L226             Difference]: Without dead ends: 30799
[2023-11-29 03:13:41,339 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21935 GetRequests, 21926 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:13:41,340 INFO  L413           NwaCegarLoop]: 39959 mSDtfsCounter, 42860 mSDsluCounter, 57319 mSDsCounter, 0 mSdLazyCounter, 25757 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42860 SdHoareTripleChecker+Valid, 97278 SdHoareTripleChecker+Invalid, 27172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 25757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time
[2023-11-29 03:13:41,340 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42860 Valid, 97278 Invalid, 27172 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1415 Valid, 25757 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time]
[2023-11-29 03:13:41,370 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30799 states.
[2023-11-29 03:13:41,571 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30799 to 16667.
[2023-11-29 03:13:41,587 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16667 states, 16666 states have (on average 1.6671666866674666) internal successors, (27785), 16666 states have internal predecessors, (27785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:41,618 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16667 states to 16667 states and 27785 transitions.
[2023-11-29 03:13:41,618 INFO  L78                 Accepts]: Start accepts. Automaton has 16667 states and 27785 transitions. Word has length 10968
[2023-11-29 03:13:41,624 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:13:41,624 INFO  L495      AbstractCegarLoop]: Abstraction has 16667 states and 27785 transitions.
[2023-11-29 03:13:41,626 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1951.8) internal successors, (9759), 5 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:13:41,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 16667 states and 27785 transitions.
[2023-11-29 03:13:42,156 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10970
[2023-11-29 03:13:42,156 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:13:42,159 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]
[2023-11-29 03:13:42,321 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 03:13:42,359 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 03:13:42,359 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:13:42,360 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:13:42,361 INFO  L85        PathProgramCache]: Analyzing trace with hash -1058189549, now seen corresponding path program 1 times
[2023-11-29 03:13:42,361 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:13:42,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150371418]
[2023-11-29 03:13:42,362 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:42,363 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:13:43,569 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:13:43,569 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006785982]
[2023-11-29 03:13:43,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:13:43,571 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:13:43,571 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:13:43,572 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:13:43,573 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 03:14:02,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:14:02,481 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57008 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:14:02,603 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:14:04,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 18 proven. 939 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked.
[2023-11-29 03:14:04,224 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:14:04,469 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1208 trivial. 0 not checked.
[2023-11-29 03:14:04,469 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:14:04,469 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150371418]
[2023-11-29 03:14:04,469 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:14:04,469 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006785982]
[2023-11-29 03:14:04,470 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006785982] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:14:04,470 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:14:04,477 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:14:04,477 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387973567]
[2023-11-29 03:14:04,478 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:14:04,483 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:14:04,483 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:14:04,487 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:14:04,487 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:14:04,490 INFO  L87              Difference]: Start difference. First operand 16667 states and 27785 transitions. Second operand  has 5 states, 5 states have (on average 1952.4) internal successors, (9762), 5 states have internal predecessors, (9762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:22,568 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:14:22,568 INFO  L93              Difference]: Finished difference Result 57706 states and 95737 transitions.
[2023-11-29 03:14:22,569 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:14:22,571 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1952.4) internal successors, (9762), 5 states have internal predecessors, (9762), 0 states have call successors, (0), 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 10969
[2023-11-29 03:14:22,578 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:14:22,599 INFO  L225             Difference]: With dead ends: 57706
[2023-11-29 03:14:22,599 INFO  L226             Difference]: Without dead ends: 30800
[2023-11-29 03:14:22,612 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21937 GetRequests, 21928 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:14:22,613 INFO  L413           NwaCegarLoop]: 39951 mSDtfsCounter, 62156 mSDsluCounter, 39428 mSDsCounter, 0 mSdLazyCounter, 20093 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62156 SdHoareTripleChecker+Valid, 79379 SdHoareTripleChecker+Invalid, 21508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 20093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:14:22,613 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [62156 Valid, 79379 Invalid, 21508 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1415 Valid, 20093 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time]
[2023-11-29 03:14:22,641 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30800 states.
[2023-11-29 03:14:22,794 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30800 to 16669.
[2023-11-29 03:14:22,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16669 states, 16668 states have (on average 1.6670866330693546) internal successors, (27787), 16668 states have internal predecessors, (27787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:22,829 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16669 states to 16669 states and 27787 transitions.
[2023-11-29 03:14:22,829 INFO  L78                 Accepts]: Start accepts. Automaton has 16669 states and 27787 transitions. Word has length 10969
[2023-11-29 03:14:22,834 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:14:22,834 INFO  L495      AbstractCegarLoop]: Abstraction has 16669 states and 27787 transitions.
[2023-11-29 03:14:22,836 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1952.4) internal successors, (9762), 5 states have internal predecessors, (9762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:14:22,836 INFO  L276                IsEmpty]: Start isEmpty. Operand 16669 states and 27787 transitions.
[2023-11-29 03:14:23,408 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10971
[2023-11-29 03:14:23,409 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:14:23,411 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:14:23,567 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 03:14:23,611 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:14:23,612 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:14:23,613 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:14:23,615 INFO  L85        PathProgramCache]: Analyzing trace with hash -328095939, now seen corresponding path program 1 times
[2023-11-29 03:14:23,615 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:14:23,615 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731601874]
[2023-11-29 03:14:23,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:14:23,617 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:14:24,636 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:14:24,636 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980524285]
[2023-11-29 03:14:24,640 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:14:24,640 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:14:24,641 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:14:24,641 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:14:24,642 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 03:14:42,591 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:14:42,952 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57011 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:14:43,073 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:14:44,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 20 proven. 939 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked.
[2023-11-29 03:14:44,586 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:14:44,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1206 trivial. 0 not checked.
[2023-11-29 03:14:44,968 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:14:44,968 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731601874]
[2023-11-29 03:14:44,968 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:14:44,968 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980524285]
[2023-11-29 03:14:44,968 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [980524285] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:14:44,968 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:14:44,976 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:14:44,976 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573769550]
[2023-11-29 03:14:44,976 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:14:44,981 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:14:44,981 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:14:44,985 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:14:44,985 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:14:44,988 INFO  L87              Difference]: Start difference. First operand 16669 states and 27787 transitions. Second operand  has 5 states, 5 states have (on average 1953.0) internal successors, (9765), 5 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:15:05,199 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:15:05,199 INFO  L93              Difference]: Finished difference Result 57714 states and 95745 transitions.
[2023-11-29 03:15:05,199 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:15:05,201 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1953.0) internal successors, (9765), 5 states have internal predecessors, (9765), 0 states have call successors, (0), 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 10970
[2023-11-29 03:15:05,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:15:05,228 INFO  L225             Difference]: With dead ends: 57714
[2023-11-29 03:15:05,228 INFO  L226             Difference]: Without dead ends: 30801
[2023-11-29 03:15:05,236 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21939 GetRequests, 21930 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:15:05,237 INFO  L413           NwaCegarLoop]: 39943 mSDtfsCounter, 42842 mSDsluCounter, 60155 mSDsCounter, 0 mSdLazyCounter, 27085 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42842 SdHoareTripleChecker+Valid, 100098 SdHoareTripleChecker+Invalid, 28500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 27085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time
[2023-11-29 03:15:05,237 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42842 Valid, 100098 Invalid, 28500 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1415 Valid, 27085 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time]
[2023-11-29 03:15:05,262 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30801 states.
[2023-11-29 03:15:05,411 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30801 to 16671.
[2023-11-29 03:15:05,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16671 states, 16670 states have (on average 1.667006598680264) internal successors, (27789), 16670 states have internal predecessors, (27789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:15:05,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16671 states to 16671 states and 27789 transitions.
[2023-11-29 03:15:05,445 INFO  L78                 Accepts]: Start accepts. Automaton has 16671 states and 27789 transitions. Word has length 10970
[2023-11-29 03:15:05,450 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:15:05,450 INFO  L495      AbstractCegarLoop]: Abstraction has 16671 states and 27789 transitions.
[2023-11-29 03:15:05,452 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1953.0) internal successors, (9765), 5 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:15:05,452 INFO  L276                IsEmpty]: Start isEmpty. Operand 16671 states and 27789 transitions.
[2023-11-29 03:15:06,006 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10972
[2023-11-29 03:15:06,006 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:15:06,010 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]
[2023-11-29 03:15:06,165 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 03:15:06,211 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:15:06,211 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:15:06,212 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:15:06,213 INFO  L85        PathProgramCache]: Analyzing trace with hash 1176007407, now seen corresponding path program 1 times
[2023-11-29 03:15:06,213 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:15:06,213 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860881302]
[2023-11-29 03:15:06,214 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:15:06,215 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:15:07,566 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:15:07,566 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627096936]
[2023-11-29 03:15:07,568 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:15:07,568 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:15:07,568 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:15:07,569 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:15:07,570 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 03:15:24,774 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:15:25,165 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57015 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:15:25,283 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:15:26,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 22 proven. 939 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked.
[2023-11-29 03:15:26,884 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:15:27,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked.
[2023-11-29 03:15:27,072 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:15:27,072 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860881302]
[2023-11-29 03:15:27,072 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:15:27,072 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627096936]
[2023-11-29 03:15:27,072 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [627096936] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:15:27,072 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:15:27,078 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:15:27,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957070599]
[2023-11-29 03:15:27,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:15:27,083 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:15:27,083 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:15:27,087 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:15:27,087 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:15:27,090 INFO  L87              Difference]: Start difference. First operand 16671 states and 27789 transitions. Second operand  has 5 states, 5 states have (on average 1953.6) internal successors, (9768), 5 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:15:47,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:15:47,470 INFO  L93              Difference]: Finished difference Result 57722 states and 95753 transitions.
[2023-11-29 03:15:47,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:15:47,472 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1953.6) internal successors, (9768), 5 states have internal predecessors, (9768), 0 states have call successors, (0), 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 10971
[2023-11-29 03:15:47,480 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:15:47,499 INFO  L225             Difference]: With dead ends: 57722
[2023-11-29 03:15:47,499 INFO  L226             Difference]: Without dead ends: 30802
[2023-11-29 03:15:47,508 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21941 GetRequests, 21932 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:15:47,509 INFO  L413           NwaCegarLoop]: 39935 mSDtfsCounter, 42836 mSDsluCounter, 60145 mSDsCounter, 0 mSdLazyCounter, 27085 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42836 SdHoareTripleChecker+Valid, 100080 SdHoareTripleChecker+Invalid, 28500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 27085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time
[2023-11-29 03:15:47,509 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42836 Valid, 100080 Invalid, 28500 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1415 Valid, 27085 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time]
[2023-11-29 03:15:47,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30802 states.
[2023-11-29 03:15:47,675 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 16673.
[2023-11-29 03:15:47,689 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16673 states, 16672 states have (on average 1.666926583493282) internal successors, (27791), 16672 states have internal predecessors, (27791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:15:47,707 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16673 states to 16673 states and 27791 transitions.
[2023-11-29 03:15:47,707 INFO  L78                 Accepts]: Start accepts. Automaton has 16673 states and 27791 transitions. Word has length 10971
[2023-11-29 03:15:47,711 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:15:47,712 INFO  L495      AbstractCegarLoop]: Abstraction has 16673 states and 27791 transitions.
[2023-11-29 03:15:47,713 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1953.6) internal successors, (9768), 5 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:15:47,713 INFO  L276                IsEmpty]: Start isEmpty. Operand 16673 states and 27791 transitions.
[2023-11-29 03:15:48,233 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10973
[2023-11-29 03:15:48,233 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:15:48,235 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 03:15:48,391 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 03:15:48,436 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 03:15:48,436 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:15:48,437 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:15:48,440 INFO  L85        PathProgramCache]: Analyzing trace with hash -873127579, now seen corresponding path program 1 times
[2023-11-29 03:15:48,440 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:15:48,440 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193678621]
[2023-11-29 03:15:48,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:15:48,441 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:15:49,402 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:15:49,402 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056989547]
[2023-11-29 03:15:49,404 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:15:49,404 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:15:49,404 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:15:49,405 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:15:49,405 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 03:16:07,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:16:07,361 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57018 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:16:07,721 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:16:09,076 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 24 proven. 939 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked.
[2023-11-29 03:16:09,076 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:16:09,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked.
[2023-11-29 03:16:09,264 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:16:09,264 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193678621]
[2023-11-29 03:16:09,265 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:16:09,265 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056989547]
[2023-11-29 03:16:09,265 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056989547] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:16:09,265 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:16:09,272 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:16:09,273 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441115354]
[2023-11-29 03:16:09,273 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:16:09,277 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:16:09,277 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:16:09,281 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:16:09,281 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:16:09,284 INFO  L87              Difference]: Start difference. First operand 16673 states and 27791 transitions. Second operand  has 5 states, 5 states have (on average 1954.2) internal successors, (9771), 5 states have internal predecessors, (9771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:16:29,243 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:16:29,244 INFO  L93              Difference]: Finished difference Result 57730 states and 95761 transitions.
[2023-11-29 03:16:29,244 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:16:29,246 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1954.2) internal successors, (9771), 5 states have internal predecessors, (9771), 0 states have call successors, (0), 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 10972
[2023-11-29 03:16:29,253 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:16:29,275 INFO  L225             Difference]: With dead ends: 57730
[2023-11-29 03:16:29,275 INFO  L226             Difference]: Without dead ends: 30803
[2023-11-29 03:16:29,287 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21943 GetRequests, 21934 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:16:29,287 INFO  L413           NwaCegarLoop]: 39927 mSDtfsCounter, 42830 mSDsluCounter, 60135 mSDsCounter, 0 mSdLazyCounter, 27085 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42830 SdHoareTripleChecker+Valid, 100062 SdHoareTripleChecker+Invalid, 28500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 27085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time
[2023-11-29 03:16:29,288 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [42830 Valid, 100062 Invalid, 28500 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1415 Valid, 27085 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time]
[2023-11-29 03:16:29,314 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30803 states.
[2023-11-29 03:16:29,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30803 to 16675.
[2023-11-29 03:16:29,486 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16675 states, 16674 states have (on average 1.6668465875014993) internal successors, (27793), 16674 states have internal predecessors, (27793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:16:29,510 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16675 states to 16675 states and 27793 transitions.
[2023-11-29 03:16:29,511 INFO  L78                 Accepts]: Start accepts. Automaton has 16675 states and 27793 transitions. Word has length 10972
[2023-11-29 03:16:29,516 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:16:29,516 INFO  L495      AbstractCegarLoop]: Abstraction has 16675 states and 27793 transitions.
[2023-11-29 03:16:29,518 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1954.2) internal successors, (9771), 5 states have internal predecessors, (9771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:16:29,518 INFO  L276                IsEmpty]: Start isEmpty. Operand 16675 states and 27793 transitions.
[2023-11-29 03:16:30,026 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10974
[2023-11-29 03:16:30,026 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:16:30,030 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:16:30,187 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 03:16:30,230 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 03:16:30,230 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:16:30,232 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:16:30,233 INFO  L85        PathProgramCache]: Analyzing trace with hash 775705673, now seen corresponding path program 1 times
[2023-11-29 03:16:30,233 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:16:30,233 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583378553]
[2023-11-29 03:16:30,234 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:16:30,234 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:16:31,381 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:16:31,381 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211641805]
[2023-11-29 03:16:31,383 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:16:31,383 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:16:31,383 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:16:31,384 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:16:31,385 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 03:16:49,598 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:16:49,946 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57021 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:16:50,062 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:16:51,469 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 26 proven. 939 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked.
[2023-11-29 03:16:51,469 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:16:51,662 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked.
[2023-11-29 03:16:51,662 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:16:51,662 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583378553]
[2023-11-29 03:16:51,662 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:16:51,662 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211641805]
[2023-11-29 03:16:51,662 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211641805] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:16:51,662 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:16:51,670 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:16:51,670 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214339194]
[2023-11-29 03:16:51,670 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:16:51,675 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:16:51,675 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:16:51,679 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:16:51,679 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:16:51,682 INFO  L87              Difference]: Start difference. First operand 16675 states and 27793 transitions. Second operand  has 5 states, 5 states have (on average 1954.8) internal successors, (9774), 5 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:17:08,559 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:17:08,559 INFO  L93              Difference]: Finished difference Result 57738 states and 95769 transitions.
[2023-11-29 03:17:08,559 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 03:17:08,561 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1954.8) internal successors, (9774), 5 states have internal predecessors, (9774), 0 states have call successors, (0), 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 10973
[2023-11-29 03:17:08,569 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:17:08,593 INFO  L225             Difference]: With dead ends: 57738
[2023-11-29 03:17:08,593 INFO  L226             Difference]: Without dead ends: 30804
[2023-11-29 03:17:08,608 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21945 GetRequests, 21936 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 03:17:08,608 INFO  L413           NwaCegarLoop]: 39919 mSDtfsCounter, 62124 mSDsluCounter, 39408 mSDsCounter, 0 mSdLazyCounter, 20093 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62124 SdHoareTripleChecker+Valid, 79327 SdHoareTripleChecker+Invalid, 21508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 20093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time
[2023-11-29 03:17:08,608 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [62124 Valid, 79327 Invalid, 21508 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1415 Valid, 20093 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time]
[2023-11-29 03:17:08,636 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30804 states.
[2023-11-29 03:17:08,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30804 to 16677.
[2023-11-29 03:17:08,814 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16677 states, 16676 states have (on average 1.666766610698009) internal successors, (27795), 16676 states have internal predecessors, (27795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:17:08,832 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16677 states to 16677 states and 27795 transitions.
[2023-11-29 03:17:08,833 INFO  L78                 Accepts]: Start accepts. Automaton has 16677 states and 27795 transitions. Word has length 10973
[2023-11-29 03:17:08,838 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:17:08,838 INFO  L495      AbstractCegarLoop]: Abstraction has 16677 states and 27795 transitions.
[2023-11-29 03:17:08,839 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1954.8) internal successors, (9774), 5 states have internal predecessors, (9774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:17:08,839 INFO  L276                IsEmpty]: Start isEmpty. Operand 16677 states and 27795 transitions.
[2023-11-29 03:17:09,346 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10975
[2023-11-29 03:17:09,346 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:17:09,348 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]
[2023-11-29 03:17:09,516 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 03:17:09,548 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:17:09,549 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:17:09,550 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:17:09,552 INFO  L85        PathProgramCache]: Analyzing trace with hash -33411829, now seen corresponding path program 1 times
[2023-11-29 03:17:09,552 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:17:09,552 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760303542]
[2023-11-29 03:17:09,553 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:17:09,553 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:17:10,499 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:17:10,499 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181790053]
[2023-11-29 03:17:10,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:17:10,501 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:17:10,501 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:17:10,502 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:17:10,503 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 03:17:27,862 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:17:28,241 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57024 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 03:17:28,368 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:17:29,961 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 28 proven. 939 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked.
[2023-11-29 03:17:29,961 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:17:30,201 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked.
[2023-11-29 03:17:30,202 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:17:30,202 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760303542]
[2023-11-29 03:17:30,202 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:17:30,202 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181790053]
[2023-11-29 03:17:30,202 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [181790053] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:17:30,202 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:17:30,207 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 03:17:30,208 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027113387]
[2023-11-29 03:17:30,208 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:17:30,212 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 03:17:30,213 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:17:30,216 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 03:17:30,217 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 03:17:30,219 INFO  L87              Difference]: Start difference. First operand 16677 states and 27795 transitions. Second operand  has 6 states, 6 states have (on average 1629.5) internal successors, (9777), 6 states have internal predecessors, (9777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:18:02,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 03:18:02,479 INFO  L93              Difference]: Finished difference Result 71938 states and 119431 transitions.
[2023-11-29 03:18:02,480 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 03:18:02,481 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1629.5) internal successors, (9777), 6 states have internal predecessors, (9777), 0 states have call successors, (0), 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 10974
[2023-11-29 03:18:02,488 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 03:18:02,511 INFO  L225             Difference]: With dead ends: 71938
[2023-11-29 03:18:02,512 INFO  L226             Difference]: Without dead ends: 44997
[2023-11-29 03:18:02,519 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21948 GetRequests, 21936 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2023-11-29 03:18:02,519 INFO  L413           NwaCegarLoop]: 39913 mSDtfsCounter, 85685 mSDsluCounter, 95918 mSDsCounter, 0 mSdLazyCounter, 42668 mSolverCounterSat, 1418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85685 SdHoareTripleChecker+Valid, 135831 SdHoareTripleChecker+Invalid, 44086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 1418 IncrementalHoareTripleChecker+Valid, 42668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time
[2023-11-29 03:18:02,520 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [85685 Valid, 135831 Invalid, 44086 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [1418 Valid, 42668 Invalid, 0 Unknown, 0 Unchecked, 30.5s Time]
[2023-11-29 03:18:02,549 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44997 states.
[2023-11-29 03:18:02,713 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44997 to 16679.
[2023-11-29 03:18:02,727 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16679 states, 16678 states have (on average 1.6666866530759084) internal successors, (27797), 16678 states have internal predecessors, (27797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:18:02,744 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16679 states to 16679 states and 27797 transitions.
[2023-11-29 03:18:02,744 INFO  L78                 Accepts]: Start accepts. Automaton has 16679 states and 27797 transitions. Word has length 10974
[2023-11-29 03:18:02,749 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 03:18:02,749 INFO  L495      AbstractCegarLoop]: Abstraction has 16679 states and 27797 transitions.
[2023-11-29 03:18:02,750 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1629.5) internal successors, (9777), 6 states have internal predecessors, (9777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 03:18:02,750 INFO  L276                IsEmpty]: Start isEmpty. Operand 16679 states and 27797 transitions.
[2023-11-29 03:18:03,219 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10976
[2023-11-29 03:18:03,219 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 03:18:03,221 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2023-11-29 03:18:03,376 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 03:18:03,421 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-29 03:18:03,422 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 03:18:03,422 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 03:18:03,423 INFO  L85        PathProgramCache]: Analyzing trace with hash -30244571, now seen corresponding path program 1 times
[2023-11-29 03:18:03,423 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 03:18:03,423 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85097891]
[2023-11-29 03:18:03,424 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:18:03,424 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 03:18:04,369 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 03:18:04,370 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361546357]
[2023-11-29 03:18:04,372 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 03:18:04,372 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 03:18:04,372 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 03:18:04,372 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 03:18:04,375 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21678cc6-de54-4e1d-a8c5-d5bad5e4eab7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 03:18:20,999 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 03:18:21,369 INFO  L262         TraceCheckSpWp]: Trace formula consists of 57028 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 03:18:21,489 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 03:18:23,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 30 proven. 939 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked.
[2023-11-29 03:18:23,003 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 03:18:23,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 1226 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1196 trivial. 0 not checked.
[2023-11-29 03:18:23,187 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 03:18:23,187 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85097891]
[2023-11-29 03:18:23,187 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 03:18:23,188 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361546357]
[2023-11-29 03:18:23,188 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [361546357] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 03:18:23,188 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 03:18:23,195 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 03:18:23,195 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284276117]
[2023-11-29 03:18:23,196 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 03:18:23,200 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 03:18:23,200 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 03:18:23,204 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 03:18:23,205 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 03:18:23,207 INFO  L87              Difference]: Start difference. First operand 16679 states and 27797 transitions. Second operand  has 5 states, 5 states have (on average 1956.0) internal successors, (9780), 5 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)