./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/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_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/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_8ddac79d-229d-4d84-b3be-0ea9117deb49/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 0e4ec6ac611e5310c2bfe6c7ea7d1a565535dac701befe58c8e22bc9a1ac60c3
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 02:10:25,985 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 02:10:26,052 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 02:10:26,058 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 02:10:26,059 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 02:10:26,087 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 02:10:26,088 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 02:10:26,089 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 02:10:26,089 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 02:10:26,090 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 02:10:26,090 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 02:10:26,091 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 02:10:26,092 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 02:10:26,092 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 02:10:26,093 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 02:10:26,093 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 02:10:26,094 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 02:10:26,094 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 02:10:26,095 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 02:10:26,095 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 02:10:26,096 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 02:10:26,099 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 02:10:26,099 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 02:10:26,100 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 02:10:26,100 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 02:10:26,101 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 02:10:26,101 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 02:10:26,102 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 02:10:26,102 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:10:26,103 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 02:10:26,103 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 02:10:26,103 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 02:10:26,104 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 02:10:26,104 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 02:10:26,104 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 02:10:26,104 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 02:10:26,104 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 02:10:26,105 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 02:10:26,105 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 02:10:26,105 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_8ddac79d-229d-4d84-b3be-0ea9117deb49/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_8ddac79d-229d-4d84-b3be-0ea9117deb49/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 -> 0e4ec6ac611e5310c2bfe6c7ea7d1a565535dac701befe58c8e22bc9a1ac60c3
[2023-11-29 02:10:26,344 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 02:10:26,364 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 02:10:26,367 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 02:10:26,368 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 02:10:26,368 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 02:10:26,370 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c
[2023-11-29 02:10:29,189 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 02:10:29,703 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 02:10:29,704 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c
[2023-11-29 02:10:29,762 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/data/2abb8de1a/dd0cef9b34bd42a786509b8593c33967/FLAGbdbb6481d
[2023-11-29 02:10:29,776 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/data/2abb8de1a/dd0cef9b34bd42a786509b8593c33967
[2023-11-29 02:10:29,779 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 02:10:29,781 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 02:10:29,782 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 02:10:29,782 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 02:10:29,788 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 02:10:29,788 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:10:29" (1/1) ...
[2023-11-29 02:10:29,789 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6bb085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:29, skipping insertion in model container
[2023-11-29 02:10:29,790 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:10:29" (1/1) ...
[2023-11-29 02:10:29,986 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 02:10:30,246 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_8ddac79d-229d-4d84-b3be-0ea9117deb49/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c[1180,1193]
[2023-11-29 02:10:31,722 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:10:31,731 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 02:10:31,744 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_8ddac79d-229d-4d84-b3be-0ea9117deb49/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c[1180,1193]
[2023-11-29 02:10:32,944 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 02:10:32,961 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 02:10:32,962 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32 WrapperNode
[2023-11-29 02:10:32,962 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 02:10:32,963 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 02:10:32,964 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 02:10:32,964 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 02:10:32,973 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:33,291 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:37,244 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56264
[2023-11-29 02:10:37,245 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 02:10:37,246 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 02:10:37,246 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 02:10:37,246 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 02:10:37,257 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:37,257 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:38,199 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:38,927 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 02:10:38,928 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:38,928 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:39,854 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:40,030 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:40,231 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:40,380 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:41,189 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 02:10:41,190 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 02:10:41,190 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 02:10:41,191 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 02:10:41,192 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (1/1) ...
[2023-11-29 02:10:41,199 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 02:10:41,211 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:10:41,224 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 02:10:41,226 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 02:10:41,259 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 02:10:41,259 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 02:10:41,259 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 02:10:41,259 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 02:10:43,212 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 02:10:43,213 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 02:11:06,916 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 02:11:07,702 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 02:11:07,703 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 02:11:07,709 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:11:07 BoogieIcfgContainer
[2023-11-29 02:11:07,709 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 02:11:07,712 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 02:11:07,712 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 02:11:07,716 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 02:11:07,716 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:10:29" (1/3) ...
[2023-11-29 02:11:07,717 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5b9c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:11:07, skipping insertion in model container
[2023-11-29 02:11:07,717 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:10:32" (2/3) ...
[2023-11-29 02:11:07,717 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5b9c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:11:07, skipping insertion in model container
[2023-11-29 02:11:07,718 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:11:07" (3/3) ...
[2023-11-29 02:11:07,719 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.5.prop6-back-serstep.c
[2023-11-29 02:11:07,740 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 02:11:07,740 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 02:11:07,969 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 02:11:07,976 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;@30b86d09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 02:11:07,976 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 02:11:08,016 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 12142 states, 12140 states have (on average 1.6668863261943987) internal successors, (20236), 12141 states have internal predecessors, (20236), 0 states have call successors, (0), 0 states 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 02:11:08,103 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1267
[2023-11-29 02:11:08,103 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:11:08,105 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:11:08,105 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:11:08,110 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:11:08,111 INFO  L85        PathProgramCache]: Analyzing trace with hash -471527210, now seen corresponding path program 1 times
[2023-11-29 02:11:08,118 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:11:08,118 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211314913]
[2023-11-29 02:11:08,119 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:11:08,119 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:11:09,127 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:11:13,776 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 02:11:13,777 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:11:13,777 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211314913]
[2023-11-29 02:11:13,778 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211314913] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:11:13,778 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:11:13,779 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:11:13,780 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450424287]
[2023-11-29 02:11:13,781 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:11:13,789 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:11:13,789 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:11:13,822 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:11:13,823 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:11:13,850 INFO  L87              Difference]: Start difference. First operand  has 12142 states, 12140 states have (on average 1.6668863261943987) internal successors, (20236), 12141 states have internal predecessors, (20236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:14,553 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:11:14,553 INFO  L93              Difference]: Finished difference Result 23755 states and 39593 transitions.
[2023-11-29 02:11:14,554 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:11:14,556 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1266
[2023-11-29 02:11:14,564 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:11:14,640 INFO  L225             Difference]: With dead ends: 23755
[2023-11-29 02:11:14,640 INFO  L226             Difference]: Without dead ends: 12142
[2023-11-29 02:11:14,658 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 02:11:14,662 INFO  L413           NwaCegarLoop]: 20229 mSDtfsCounter, 1 mSDsluCounter, 40453 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60682 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:11:14,663 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60682 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:11:14,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12142 states.
[2023-11-29 02:11:14,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 12142.
[2023-11-29 02:11:14,951 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12142 states, 12141 states have (on average 1.6665843011284078) internal successors, (20234), 12141 states have internal predecessors, (20234), 0 states have call successors, (0), 0 states 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 02:11:14,983 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12142 states to 12142 states and 20234 transitions.
[2023-11-29 02:11:14,985 INFO  L78                 Accepts]: Start accepts. Automaton has 12142 states and 20234 transitions. Word has length 1266
[2023-11-29 02:11:14,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:11:14,987 INFO  L495      AbstractCegarLoop]: Abstraction has 12142 states and 20234 transitions.
[2023-11-29 02:11:14,988 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:14,988 INFO  L276                IsEmpty]: Start isEmpty. Operand 12142 states and 20234 transitions.
[2023-11-29 02:11:15,049 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1268
[2023-11-29 02:11:15,050 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:11:15,051 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:11:15,051 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 02:11:15,051 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:11:15,051 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:11:15,052 INFO  L85        PathProgramCache]: Analyzing trace with hash -1730709102, now seen corresponding path program 1 times
[2023-11-29 02:11:15,052 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:11:15,053 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326393473]
[2023-11-29 02:11:15,053 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:11:15,053 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:11:15,576 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:11:17,479 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 02:11:17,480 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:11:17,480 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326393473]
[2023-11-29 02:11:17,480 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326393473] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:11:17,481 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:11:17,481 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:11:17,481 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994208401]
[2023-11-29 02:11:17,481 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:11:17,485 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:11:17,485 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:11:17,486 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:11:17,487 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:11:17,487 INFO  L87              Difference]: Start difference. First operand 12142 states and 20234 transitions. Second operand  has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:17,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:11:17,869 INFO  L93              Difference]: Finished difference Result 23758 states and 39591 transitions.
[2023-11-29 02:11:17,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 02:11:17,869 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1267
[2023-11-29 02:11:17,871 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:11:17,924 INFO  L225             Difference]: With dead ends: 23758
[2023-11-29 02:11:17,924 INFO  L226             Difference]: Without dead ends: 12145
[2023-11-29 02:11:17,935 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 02:11:17,936 INFO  L413           NwaCegarLoop]: 20229 mSDtfsCounter, 1 mSDsluCounter, 40451 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60680 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 02:11:17,937 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60680 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:11:17,958 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12145 states.
[2023-11-29 02:11:18,111 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12145 to 12144.
[2023-11-29 02:11:18,128 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12144 states, 12143 states have (on average 1.6664745120645639) internal successors, (20236), 12143 states have internal predecessors, (20236), 0 states have call successors, (0), 0 states 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 02:11:18,151 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12144 states to 12144 states and 20236 transitions.
[2023-11-29 02:11:18,151 INFO  L78                 Accepts]: Start accepts. Automaton has 12144 states and 20236 transitions. Word has length 1267
[2023-11-29 02:11:18,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:11:18,154 INFO  L495      AbstractCegarLoop]: Abstraction has 12144 states and 20236 transitions.
[2023-11-29 02:11:18,154 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 316.75) internal successors, (1267), 4 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:18,155 INFO  L276                IsEmpty]: Start isEmpty. Operand 12144 states and 20236 transitions.
[2023-11-29 02:11:18,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1269
[2023-11-29 02:11:18,166 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:11:18,167 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:11:18,167 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 02:11:18,167 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:11:18,168 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:11:18,168 INFO  L85        PathProgramCache]: Analyzing trace with hash -547792142, now seen corresponding path program 1 times
[2023-11-29 02:11:18,169 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:11:18,169 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773281079]
[2023-11-29 02:11:18,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:11:18,170 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:11:18,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:11:20,460 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 02:11:20,460 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:11:20,460 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773281079]
[2023-11-29 02:11:20,460 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773281079] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:11:20,461 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:11:20,461 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:11:20,461 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928620773]
[2023-11-29 02:11:20,462 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:11:20,463 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 02:11:20,463 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:11:20,465 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 02:11:20,465 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 02:11:20,466 INFO  L87              Difference]: Start difference. First operand 12144 states and 20236 transitions. Second operand  has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:21,142 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:11:21,142 INFO  L93              Difference]: Finished difference Result 35368 states and 58937 transitions.
[2023-11-29 02:11:21,143 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 02:11:21,143 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1268
[2023-11-29 02:11:21,146 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:11:21,189 INFO  L225             Difference]: With dead ends: 35368
[2023-11-29 02:11:21,190 INFO  L226             Difference]: Without dead ends: 23753
[2023-11-29 02:11:21,208 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 02:11:21,209 INFO  L413           NwaCegarLoop]: 22494 mSDtfsCounter, 19342 mSDsluCounter, 42714 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19342 SdHoareTripleChecker+Valid, 65208 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 02:11:21,210 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19342 Valid, 65208 Invalid, 19 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:11:21,242 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23753 states.
[2023-11-29 02:11:21,481 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23753 to 12146.
[2023-11-29 02:11:21,499 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12146 states, 12145 states have (on average 1.6663647591601483) internal successors, (20238), 12145 states have internal predecessors, (20238), 0 states have call successors, (0), 0 states 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 02:11:21,533 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12146 states to 12146 states and 20238 transitions.
[2023-11-29 02:11:21,534 INFO  L78                 Accepts]: Start accepts. Automaton has 12146 states and 20238 transitions. Word has length 1268
[2023-11-29 02:11:21,536 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:11:21,536 INFO  L495      AbstractCegarLoop]: Abstraction has 12146 states and 20238 transitions.
[2023-11-29 02:11:21,537 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:21,537 INFO  L276                IsEmpty]: Start isEmpty. Operand 12146 states and 20238 transitions.
[2023-11-29 02:11:21,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1270
[2023-11-29 02:11:21,553 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:11:21,554 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:11:21,554 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 02:11:21,554 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:11:21,555 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:11:21,556 INFO  L85        PathProgramCache]: Analyzing trace with hash 87613818, now seen corresponding path program 1 times
[2023-11-29 02:11:21,556 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:11:21,556 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740949328]
[2023-11-29 02:11:21,556 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:11:21,556 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:11:22,182 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:11:24,545 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 02:11:24,545 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:11:24,545 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740949328]
[2023-11-29 02:11:24,546 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740949328] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 02:11:24,546 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 02:11:24,546 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 02:11:24,546 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321428171]
[2023-11-29 02:11:24,546 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:11:24,548 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:11:24,548 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:11:24,550 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:11:24,551 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 02:11:24,551 INFO  L87              Difference]: Start difference. First operand 12146 states and 20238 transitions. Second operand  has 5 states, 5 states have (on average 253.8) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:25,307 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:11:25,307 INFO  L93              Difference]: Finished difference Result 36733 states and 61208 transitions.
[2023-11-29 02:11:25,308 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:11:25,308 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 253.8) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1269
[2023-11-29 02:11:25,311 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:11:25,344 INFO  L225             Difference]: With dead ends: 36733
[2023-11-29 02:11:25,344 INFO  L226             Difference]: Without dead ends: 25116
[2023-11-29 02:11:25,360 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 02:11:25,361 INFO  L413           NwaCegarLoop]: 22493 mSDtfsCounter, 79266 mSDsluCounter, 40452 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79266 SdHoareTripleChecker+Valid, 62945 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 02:11:25,362 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [79266 Valid, 62945 Invalid, 16 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 02:11:25,390 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25116 states.
[2023-11-29 02:11:25,576 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25116 to 13505.
[2023-11-29 02:11:25,592 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13505 states, 13504 states have (on average 1.6663951421800949) internal successors, (22503), 13504 states have internal predecessors, (22503), 0 states have call successors, (0), 0 states 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 02:11:25,611 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13505 states to 13505 states and 22503 transitions.
[2023-11-29 02:11:25,611 INFO  L78                 Accepts]: Start accepts. Automaton has 13505 states and 22503 transitions. Word has length 1269
[2023-11-29 02:11:25,613 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:11:25,613 INFO  L495      AbstractCegarLoop]: Abstraction has 13505 states and 22503 transitions.
[2023-11-29 02:11:25,613 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 253.8) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:11:25,614 INFO  L276                IsEmpty]: Start isEmpty. Operand 13505 states and 22503 transitions.
[2023-11-29 02:11:26,210 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8997
[2023-11-29 02:11:26,210 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:11:26,215 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]
[2023-11-29 02:11:26,216 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 02:11:26,216 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:11:26,216 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:11:26,220 INFO  L85        PathProgramCache]: Analyzing trace with hash 1617045238, now seen corresponding path program 1 times
[2023-11-29 02:11:26,220 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:11:26,221 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108121298]
[2023-11-29 02:11:26,222 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:11:26,223 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:11:27,470 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:11:27,471 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601242291]
[2023-11-29 02:11:27,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:11:27,473 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:11:27,473 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:11:27,475 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:11:27,478 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 02:11:40,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:11:41,007 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45308 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:11:41,289 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:11:43,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 8 proven. 675 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked.
[2023-11-29 02:11:43,209 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:11:43,622 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked.
[2023-11-29 02:11:43,622 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:11:43,622 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108121298]
[2023-11-29 02:11:43,623 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:11:43,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601242291]
[2023-11-29 02:11:43,623 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [601242291] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:11:43,623 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:11:43,629 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:11:43,629 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258186896]
[2023-11-29 02:11:43,630 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:11:43,643 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:11:43,644 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:11:43,656 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:11:43,656 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:11:43,659 INFO  L87              Difference]: Start difference. First operand 13505 states and 22503 transitions. Second operand  has 5 states, 5 states have (on average 1618.6) internal successors, (8093), 5 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:12:01,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:12:01,983 INFO  L93              Difference]: Finished difference Result 47130 states and 78129 transitions.
[2023-11-29 02:12:01,983 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:12:01,985 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1618.6) internal successors, (8093), 5 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8996
[2023-11-29 02:12:01,997 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:12:02,028 INFO  L225             Difference]: With dead ends: 47130
[2023-11-29 02:12:02,028 INFO  L226             Difference]: Without dead ends: 25115
[2023-11-29 02:12:02,056 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17991 GetRequests, 17982 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 02:12:02,057 INFO  L413           NwaCegarLoop]: 32107 mSDtfsCounter, 35034 mSDsluCounter, 48634 mSDsCounter, 0 mSdLazyCounter, 22665 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35034 SdHoareTripleChecker+Valid, 80741 SdHoareTripleChecker+Invalid, 23880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 22665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:12:02,058 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35034 Valid, 80741 Invalid, 23880 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 22665 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time]
[2023-11-29 02:12:02,092 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25115 states.
[2023-11-29 02:12:02,348 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 13507.
[2023-11-29 02:12:02,362 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13507 states, 13506 states have (on average 1.6662964608322228) internal successors, (22505), 13506 states have internal predecessors, (22505), 0 states have call successors, (0), 0 states 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 02:12:02,381 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13507 states to 13507 states and 22505 transitions.
[2023-11-29 02:12:02,382 INFO  L78                 Accepts]: Start accepts. Automaton has 13507 states and 22505 transitions. Word has length 8996
[2023-11-29 02:12:02,387 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:12:02,387 INFO  L495      AbstractCegarLoop]: Abstraction has 13507 states and 22505 transitions.
[2023-11-29 02:12:02,389 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1618.6) internal successors, (8093), 5 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 02:12:02,389 INFO  L276                IsEmpty]: Start isEmpty. Operand 13507 states and 22505 transitions.
[2023-11-29 02:12:03,120 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8998
[2023-11-29 02:12:03,120 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:12:03,126 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:12:03,258 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 02:12:03,326 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:12:03,327 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:12:03,327 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:12:03,330 INFO  L85        PathProgramCache]: Analyzing trace with hash -1610000752, now seen corresponding path program 1 times
[2023-11-29 02:12:03,330 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:12:03,330 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528450460]
[2023-11-29 02:12:03,331 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:12:03,332 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:12:04,594 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:12:04,594 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997095889]
[2023-11-29 02:12:04,596 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:12:04,596 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:12:04,596 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:12:04,598 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:12:04,600 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 02:12:17,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:12:17,736 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45311 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:12:17,879 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:12:19,257 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 10 proven. 675 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked.
[2023-11-29 02:12:19,257 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:12:19,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked.
[2023-11-29 02:12:19,443 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:12:19,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528450460]
[2023-11-29 02:12:19,444 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:12:19,444 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997095889]
[2023-11-29 02:12:19,444 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [997095889] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:12:19,444 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:12:19,449 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:12:19,450 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254499807]
[2023-11-29 02:12:19,450 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:12:19,460 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:12:19,460 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:12:19,468 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:12:19,469 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:12:19,471 INFO  L87              Difference]: Start difference. First operand 13507 states and 22505 transitions. Second operand  has 5 states, 5 states have (on average 1619.2) internal successors, (8096), 5 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states 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 02:12:34,387 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:12:34,387 INFO  L93              Difference]: Finished difference Result 47138 states and 78137 transitions.
[2023-11-29 02:12:34,388 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:12:34,389 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1619.2) internal successors, (8096), 5 states have internal predecessors, (8096), 0 states have call successors, (0), 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 8997
[2023-11-29 02:12:34,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:12:34,435 INFO  L225             Difference]: With dead ends: 47138
[2023-11-29 02:12:34,436 INFO  L226             Difference]: Without dead ends: 25116
[2023-11-29 02:12:34,447 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17993 GetRequests, 17984 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 02:12:34,448 INFO  L413           NwaCegarLoop]: 32099 mSDtfsCounter, 50722 mSDsluCounter, 31877 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50722 SdHoareTripleChecker+Valid, 63976 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:12:34,448 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50722 Valid, 63976 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time]
[2023-11-29 02:12:34,474 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25116 states.
[2023-11-29 02:12:34,650 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25116 to 13509.
[2023-11-29 02:12:34,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13509 states, 13508 states have (on average 1.6661978087059521) internal successors, (22507), 13508 states have internal predecessors, (22507), 0 states have call successors, (0), 0 states 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 02:12:34,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13509 states to 13509 states and 22507 transitions.
[2023-11-29 02:12:34,687 INFO  L78                 Accepts]: Start accepts. Automaton has 13509 states and 22507 transitions. Word has length 8997
[2023-11-29 02:12:34,693 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:12:34,694 INFO  L495      AbstractCegarLoop]: Abstraction has 13509 states and 22507 transitions.
[2023-11-29 02:12:34,696 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1619.2) internal successors, (8096), 5 states have internal predecessors, (8096), 0 states have call successors, (0), 0 states 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 02:12:34,696 INFO  L276                IsEmpty]: Start isEmpty. Operand 13509 states and 22507 transitions.
[2023-11-29 02:12:35,283 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8999
[2023-11-29 02:12:35,283 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:12:35,288 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:12:35,447 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 02:12:35,488 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:12:35,489 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:12:35,490 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:12:35,495 INFO  L85        PathProgramCache]: Analyzing trace with hash 1169578844, now seen corresponding path program 1 times
[2023-11-29 02:12:35,495 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:12:35,495 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537599374]
[2023-11-29 02:12:35,496 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:12:35,496 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:12:36,471 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:12:36,472 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229205437]
[2023-11-29 02:12:36,473 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:12:36,473 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:12:36,474 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:12:36,474 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:12:36,475 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 02:12:49,162 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:12:49,460 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45314 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:12:49,596 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:12:50,640 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 12 proven. 675 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked.
[2023-11-29 02:12:50,640 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:12:50,824 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked.
[2023-11-29 02:12:50,824 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:12:50,824 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537599374]
[2023-11-29 02:12:50,824 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:12:50,824 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229205437]
[2023-11-29 02:12:50,824 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [229205437] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:12:50,824 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:12:50,829 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:12:50,829 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918268102]
[2023-11-29 02:12:50,829 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:12:50,835 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:12:50,836 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:12:50,841 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:12:50,841 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:12:50,843 INFO  L87              Difference]: Start difference. First operand 13509 states and 22507 transitions. Second operand  has 5 states, 5 states have (on average 1619.8) internal successors, (8099), 5 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states 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 02:13:05,864 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:13:05,864 INFO  L93              Difference]: Finished difference Result 47146 states and 78145 transitions.
[2023-11-29 02:13:05,865 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:13:05,866 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1619.8) internal successors, (8099), 5 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8998
[2023-11-29 02:13:05,874 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:13:05,897 INFO  L225             Difference]: With dead ends: 47146
[2023-11-29 02:13:05,898 INFO  L226             Difference]: Without dead ends: 25117
[2023-11-29 02:13:05,912 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17995 GetRequests, 17986 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 02:13:05,913 INFO  L413           NwaCegarLoop]: 32091 mSDtfsCounter, 50714 mSDsluCounter, 31872 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50714 SdHoareTripleChecker+Valid, 63963 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:13:05,913 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50714 Valid, 63963 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-29 02:13:05,948 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25117 states.
[2023-11-29 02:13:06,219 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25117 to 13511.
[2023-11-29 02:13:06,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13511 states, 13510 states have (on average 1.666099185788305) internal successors, (22509), 13510 states have internal predecessors, (22509), 0 states have call successors, (0), 0 states 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 02:13:06,255 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13511 states to 13511 states and 22509 transitions.
[2023-11-29 02:13:06,255 INFO  L78                 Accepts]: Start accepts. Automaton has 13511 states and 22509 transitions. Word has length 8998
[2023-11-29 02:13:06,263 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:13:06,263 INFO  L495      AbstractCegarLoop]: Abstraction has 13511 states and 22509 transitions.
[2023-11-29 02:13:06,265 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1619.8) internal successors, (8099), 5 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states 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 02:13:06,265 INFO  L276                IsEmpty]: Start isEmpty. Operand 13511 states and 22509 transitions.
[2023-11-29 02:13:06,640 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9000
[2023-11-29 02:13:06,640 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:13:06,645 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:06,774 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 02:13:06,845 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:13:06,846 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:13:06,846 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:13:06,849 INFO  L85        PathProgramCache]: Analyzing trace with hash 527308972, now seen corresponding path program 1 times
[2023-11-29 02:13:06,849 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:13:06,849 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360987242]
[2023-11-29 02:13:06,850 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:13:06,850 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:13:07,784 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:13:07,784 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980210246]
[2023-11-29 02:13:07,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:13:07,786 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:13:07,786 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:13:07,787 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:13:07,789 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 02:13:20,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:13:20,489 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45318 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:13:20,922 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:13:21,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 14 proven. 675 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2023-11-29 02:13:21,962 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:13:22,121 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked.
[2023-11-29 02:13:22,121 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:13:22,122 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360987242]
[2023-11-29 02:13:22,122 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:13:22,122 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980210246]
[2023-11-29 02:13:22,122 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980210246] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:13:22,122 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:13:22,126 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:13:22,127 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530252480]
[2023-11-29 02:13:22,127 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:13:22,134 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:13:22,134 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:13:22,139 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:13:22,140 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:13:22,142 INFO  L87              Difference]: Start difference. First operand 13511 states and 22509 transitions. Second operand  has 5 states, 5 states have (on average 1620.4) internal successors, (8102), 5 states have internal predecessors, (8102), 0 states have call successors, (0), 0 states 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 02:13:38,661 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:13:38,661 INFO  L93              Difference]: Finished difference Result 47154 states and 78153 transitions.
[2023-11-29 02:13:38,661 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:13:38,663 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1620.4) internal successors, (8102), 5 states have internal predecessors, (8102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8999
[2023-11-29 02:13:38,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:13:38,721 INFO  L225             Difference]: With dead ends: 47154
[2023-11-29 02:13:38,721 INFO  L226             Difference]: Without dead ends: 25118
[2023-11-29 02:13:38,731 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17997 GetRequests, 17988 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 02:13:38,732 INFO  L413           NwaCegarLoop]: 32083 mSDtfsCounter, 35021 mSDsluCounter, 46334 mSDsCounter, 0 mSdLazyCounter, 21789 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35021 SdHoareTripleChecker+Valid, 78417 SdHoareTripleChecker+Invalid, 23004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 21789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time
[2023-11-29 02:13:38,733 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35021 Valid, 78417 Invalid, 23004 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 21789 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time]
[2023-11-29 02:13:38,757 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25118 states.
[2023-11-29 02:13:38,898 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25118 to 13513.
[2023-11-29 02:13:38,911 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13513 states, 13512 states have (on average 1.6660005920663115) internal successors, (22511), 13512 states have internal predecessors, (22511), 0 states have call successors, (0), 0 states 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 02:13:38,927 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 22511 transitions.
[2023-11-29 02:13:38,928 INFO  L78                 Accepts]: Start accepts. Automaton has 13513 states and 22511 transitions. Word has length 8999
[2023-11-29 02:13:38,932 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:13:38,932 INFO  L495      AbstractCegarLoop]: Abstraction has 13513 states and 22511 transitions.
[2023-11-29 02:13:38,934 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1620.4) internal successors, (8102), 5 states have internal predecessors, (8102), 0 states have call successors, (0), 0 states 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 02:13:38,934 INFO  L276                IsEmpty]: Start isEmpty. Operand 13513 states and 22511 transitions.
[2023-11-29 02:13:39,268 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9001
[2023-11-29 02:13:39,268 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:13:39,273 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:13:39,402 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-11-29 02:13:39,474 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:13:39,474 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:13:39,475 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:13:39,478 INFO  L85        PathProgramCache]: Analyzing trace with hash 1653646660, now seen corresponding path program 1 times
[2023-11-29 02:13:39,478 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:13:39,478 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333014306]
[2023-11-29 02:13:39,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:13:39,479 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:13:40,362 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:13:40,362 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462064960]
[2023-11-29 02:13:40,364 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:13:40,364 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:13:40,364 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:13:40,365 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:13:40,366 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 02:13:52,522 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:13:52,830 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45321 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:13:52,982 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:13:54,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2023-11-29 02:13:54,051 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:13:54,275 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked.
[2023-11-29 02:13:54,275 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:13:54,276 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333014306]
[2023-11-29 02:13:54,276 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:13:54,276 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462064960]
[2023-11-29 02:13:54,276 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [462064960] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:13:54,276 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:13:54,281 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:13:54,282 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762894401]
[2023-11-29 02:13:54,282 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:13:54,290 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:13:54,291 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:13:54,299 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:13:54,299 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:13:54,302 INFO  L87              Difference]: Start difference. First operand 13513 states and 22511 transitions. Second operand  has 5 states, 5 states have (on average 1621.0) internal successors, (8105), 5 states have internal predecessors, (8105), 0 states have call successors, (0), 0 states 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 02:14:10,719 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:14:10,719 INFO  L93              Difference]: Finished difference Result 47162 states and 78161 transitions.
[2023-11-29 02:14:10,720 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:14:10,721 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1621.0) internal successors, (8105), 5 states have internal predecessors, (8105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9000
[2023-11-29 02:14:10,727 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:14:10,747 INFO  L225             Difference]: With dead ends: 47162
[2023-11-29 02:14:10,747 INFO  L226             Difference]: Without dead ends: 25119
[2023-11-29 02:14:10,759 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17999 GetRequests, 17990 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 02:14:10,760 INFO  L413           NwaCegarLoop]: 32075 mSDtfsCounter, 35016 mSDsluCounter, 46326 mSDsCounter, 0 mSdLazyCounter, 21789 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35016 SdHoareTripleChecker+Valid, 78401 SdHoareTripleChecker+Invalid, 23004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 21789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time
[2023-11-29 02:14:10,760 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35016 Valid, 78401 Invalid, 23004 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 21789 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time]
[2023-11-29 02:14:10,786 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25119 states.
[2023-11-29 02:14:10,929 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25119 to 13515.
[2023-11-29 02:14:10,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13515 states, 13514 states have (on average 1.665902027527009) internal successors, (22513), 13514 states have internal predecessors, (22513), 0 states have call successors, (0), 0 states 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 02:14:10,958 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13515 states to 13515 states and 22513 transitions.
[2023-11-29 02:14:10,958 INFO  L78                 Accepts]: Start accepts. Automaton has 13515 states and 22513 transitions. Word has length 9000
[2023-11-29 02:14:10,963 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:14:10,963 INFO  L495      AbstractCegarLoop]: Abstraction has 13515 states and 22513 transitions.
[2023-11-29 02:14:10,964 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1621.0) internal successors, (8105), 5 states have internal predecessors, (8105), 0 states have call successors, (0), 0 states 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 02:14:10,964 INFO  L276                IsEmpty]: Start isEmpty. Operand 13515 states and 22513 transitions.
[2023-11-29 02:14:11,307 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9002
[2023-11-29 02:14:11,307 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:14:11,310 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:14:11,438 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 02:14:11,511 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:14:11,511 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:14:11,512 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:14:11,515 INFO  L85        PathProgramCache]: Analyzing trace with hash 397497670, now seen corresponding path program 1 times
[2023-11-29 02:14:11,515 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:14:11,515 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883760099]
[2023-11-29 02:14:11,516 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:14:11,516 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:14:12,395 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:14:12,395 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445900636]
[2023-11-29 02:14:12,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:14:12,397 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:14:12,397 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:14:12,398 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:14:12,399 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 02:14:24,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:14:25,249 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45324 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:14:25,384 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:14:26,445 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 18 proven. 675 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2023-11-29 02:14:26,445 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:14:26,640 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked.
[2023-11-29 02:14:26,640 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:14:26,640 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883760099]
[2023-11-29 02:14:26,640 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:14:26,641 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445900636]
[2023-11-29 02:14:26,641 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445900636] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:14:26,641 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:14:26,646 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:14:26,646 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550075727]
[2023-11-29 02:14:26,646 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:14:26,652 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:14:26,652 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:14:26,658 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:14:26,658 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:14:26,660 INFO  L87              Difference]: Start difference. First operand 13515 states and 22513 transitions. Second operand  has 5 states, 5 states have (on average 1621.6) internal successors, (8108), 5 states have internal predecessors, (8108), 0 states have call successors, (0), 0 states 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 02:14:43,880 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:14:43,881 INFO  L93              Difference]: Finished difference Result 47170 states and 78169 transitions.
[2023-11-29 02:14:43,881 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:14:43,882 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1621.6) internal successors, (8108), 5 states have internal predecessors, (8108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9001
[2023-11-29 02:14:43,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:14:43,905 INFO  L225             Difference]: With dead ends: 47170
[2023-11-29 02:14:43,905 INFO  L226             Difference]: Without dead ends: 25120
[2023-11-29 02:14:43,915 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18001 GetRequests, 17992 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 02:14:43,915 INFO  L413           NwaCegarLoop]: 32067 mSDtfsCounter, 35004 mSDsluCounter, 48584 mSDsCounter, 0 mSdLazyCounter, 22665 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35004 SdHoareTripleChecker+Valid, 80651 SdHoareTripleChecker+Invalid, 23880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 22665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time
[2023-11-29 02:14:43,916 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [35004 Valid, 80651 Invalid, 23880 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 22665 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time]
[2023-11-29 02:14:43,940 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25120 states.
[2023-11-29 02:14:44,077 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25120 to 13517.
[2023-11-29 02:14:44,089 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13517 states, 13516 states have (on average 1.665803492157443) internal successors, (22515), 13516 states have internal predecessors, (22515), 0 states have call successors, (0), 0 states 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 02:14:44,106 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 22515 transitions.
[2023-11-29 02:14:44,106 INFO  L78                 Accepts]: Start accepts. Automaton has 13517 states and 22515 transitions. Word has length 9001
[2023-11-29 02:14:44,111 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:14:44,111 INFO  L495      AbstractCegarLoop]: Abstraction has 13517 states and 22515 transitions.
[2023-11-29 02:14:44,113 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1621.6) internal successors, (8108), 5 states have internal predecessors, (8108), 0 states have call successors, (0), 0 states 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 02:14:44,113 INFO  L276                IsEmpty]: Start isEmpty. Operand 13517 states and 22515 transitions.
[2023-11-29 02:14:44,418 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9003
[2023-11-29 02:14:44,418 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:14:44,422 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:14:44,550 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 02:14:44,622 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:14:44,623 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:14:44,623 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:14:44,625 INFO  L85        PathProgramCache]: Analyzing trace with hash 1848532394, now seen corresponding path program 1 times
[2023-11-29 02:14:44,625 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:14:44,625 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695406946]
[2023-11-29 02:14:44,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:14:44,626 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:14:45,536 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:14:45,536 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050384310]
[2023-11-29 02:14:45,538 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:14:45,538 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:14:45,538 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:14:45,539 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:14:45,540 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 02:14:57,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:14:58,179 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45327 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:14:58,332 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:14:59,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 20 proven. 675 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2023-11-29 02:14:59,342 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:14:59,605 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked.
[2023-11-29 02:14:59,605 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:14:59,606 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695406946]
[2023-11-29 02:14:59,606 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:14:59,606 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050384310]
[2023-11-29 02:14:59,606 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050384310] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:14:59,606 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:14:59,610 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 02:14:59,611 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164129075]
[2023-11-29 02:14:59,611 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:14:59,617 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:14:59,617 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:14:59,622 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:14:59,622 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 02:14:59,625 INFO  L87              Difference]: Start difference. First operand 13517 states and 22515 transitions. Second operand  has 6 states, 6 states have (on average 1351.8333333333333) internal successors, (8111), 6 states have internal predecessors, (8111), 0 states have call successors, (0), 0 states 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 02:15:31,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:15:31,608 INFO  L93              Difference]: Finished difference Result 58822 states and 97571 transitions.
[2023-11-29 02:15:31,608 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 02:15:31,609 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1351.8333333333333) internal successors, (8111), 6 states have internal predecessors, (8111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9002
[2023-11-29 02:15:31,615 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:15:31,633 INFO  L225             Difference]: With dead ends: 58822
[2023-11-29 02:15:31,633 INFO  L226             Difference]: Without dead ends: 36765
[2023-11-29 02:15:31,641 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18004 GetRequests, 17992 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 02:15:31,641 INFO  L413           NwaCegarLoop]: 32061 mSDtfsCounter, 54344 mSDsluCounter, 108737 mSDsCounter, 0 mSdLazyCounter, 46653 mSolverCounterSat, 1217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54344 SdHoareTripleChecker+Valid, 140798 SdHoareTripleChecker+Invalid, 47870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 1217 IncrementalHoareTripleChecker+Valid, 46653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time
[2023-11-29 02:15:31,642 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [54344 Valid, 140798 Invalid, 47870 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [1217 Valid, 46653 Invalid, 0 Unknown, 0 Unchecked, 30.4s Time]
[2023-11-29 02:15:31,669 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36765 states.
[2023-11-29 02:15:31,830 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36765 to 13519.
[2023-11-29 02:15:31,843 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13519 states, 13518 states have (on average 1.6657049859446664) internal successors, (22517), 13518 states have internal predecessors, (22517), 0 states have call successors, (0), 0 states 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 02:15:31,859 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13519 states to 13519 states and 22517 transitions.
[2023-11-29 02:15:31,860 INFO  L78                 Accepts]: Start accepts. Automaton has 13519 states and 22517 transitions. Word has length 9002
[2023-11-29 02:15:31,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:15:31,864 INFO  L495      AbstractCegarLoop]: Abstraction has 13519 states and 22517 transitions.
[2023-11-29 02:15:31,866 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1351.8333333333333) internal successors, (8111), 6 states have internal predecessors, (8111), 0 states have call successors, (0), 0 states 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 02:15:31,866 INFO  L276                IsEmpty]: Start isEmpty. Operand 13519 states and 22517 transitions.
[2023-11-29 02:15:32,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9004
[2023-11-29 02:15:32,176 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:15:32,178 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:15:32,309 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 02:15:32,379 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:15:32,379 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:15:32,379 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:15:32,383 INFO  L85        PathProgramCache]: Analyzing trace with hash -67993502, now seen corresponding path program 1 times
[2023-11-29 02:15:32,383 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:15:32,383 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064363234]
[2023-11-29 02:15:32,384 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:15:32,384 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:15:33,297 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:15:33,298 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122596377]
[2023-11-29 02:15:33,299 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:15:33,299 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:15:33,300 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:15:33,300 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:15:33,301 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 02:15:45,971 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:15:46,282 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45331 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:15:46,401 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:15:47,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 22 proven. 675 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked.
[2023-11-29 02:15:47,354 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:15:47,517 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked.
[2023-11-29 02:15:47,517 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:15:47,517 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064363234]
[2023-11-29 02:15:47,517 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:15:47,517 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122596377]
[2023-11-29 02:15:47,517 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122596377] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:15:47,517 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:15:47,522 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:15:47,522 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830176962]
[2023-11-29 02:15:47,522 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:15:47,528 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:15:47,528 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:15:47,535 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:15:47,535 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:15:47,537 INFO  L87              Difference]: Start difference. First operand 13519 states and 22517 transitions. Second operand  has 5 states, 5 states have (on average 1622.8) internal successors, (8114), 5 states have internal predecessors, (8114), 0 states have call successors, (0), 0 states 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 02:16:04,631 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:16:04,631 INFO  L93              Difference]: Finished difference Result 47186 states and 78185 transitions.
[2023-11-29 02:16:04,632 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:16:04,633 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1622.8) internal successors, (8114), 5 states have internal predecessors, (8114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9003
[2023-11-29 02:16:04,639 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:16:04,660 INFO  L225             Difference]: With dead ends: 47186
[2023-11-29 02:16:04,660 INFO  L226             Difference]: Without dead ends: 25122
[2023-11-29 02:16:04,673 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18005 GetRequests, 17996 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 02:16:04,674 INFO  L413           NwaCegarLoop]: 32051 mSDtfsCounter, 34992 mSDsluCounter, 48564 mSDsCounter, 0 mSdLazyCounter, 22665 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34992 SdHoareTripleChecker+Valid, 80615 SdHoareTripleChecker+Invalid, 23880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 22665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:16:04,674 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34992 Valid, 80615 Invalid, 23880 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 22665 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time]
[2023-11-29 02:16:04,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25122 states.
[2023-11-29 02:16:04,848 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25122 to 13521.
[2023-11-29 02:16:04,860 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13521 states, 13520 states have (on average 1.6656065088757397) internal successors, (22519), 13520 states have internal predecessors, (22519), 0 states have call successors, (0), 0 states 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 02:16:04,876 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13521 states to 13521 states and 22519 transitions.
[2023-11-29 02:16:04,876 INFO  L78                 Accepts]: Start accepts. Automaton has 13521 states and 22519 transitions. Word has length 9003
[2023-11-29 02:16:04,881 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:16:04,881 INFO  L495      AbstractCegarLoop]: Abstraction has 13521 states and 22519 transitions.
[2023-11-29 02:16:04,883 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1622.8) internal successors, (8114), 5 states have internal predecessors, (8114), 0 states have call successors, (0), 0 states 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 02:16:04,883 INFO  L276                IsEmpty]: Start isEmpty. Operand 13521 states and 22519 transitions.
[2023-11-29 02:16:05,286 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9005
[2023-11-29 02:16:05,286 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:05,288 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:16:05,420 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-29 02:16:05,488 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:16:05,489 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:05,490 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:05,492 INFO  L85        PathProgramCache]: Analyzing trace with hash -782452590, now seen corresponding path program 1 times
[2023-11-29 02:16:05,492 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:05,492 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500993164]
[2023-11-29 02:16:05,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:05,493 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:06,403 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:16:06,403 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967127297]
[2023-11-29 02:16:06,405 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:06,405 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:16:06,405 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:16:06,406 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:16:06,407 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 02:16:18,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:16:18,789 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45334 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:16:18,907 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:16:19,907 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 24 proven. 675 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked.
[2023-11-29 02:16:19,907 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:16:20,075 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked.
[2023-11-29 02:16:20,075 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:16:20,076 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500993164]
[2023-11-29 02:16:20,076 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:16:20,076 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967127297]
[2023-11-29 02:16:20,076 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [967127297] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:16:20,076 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:16:20,080 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:16:20,080 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100031633]
[2023-11-29 02:16:20,081 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:16:20,085 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:16:20,085 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:16:20,089 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:16:20,089 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:16:20,091 INFO  L87              Difference]: Start difference. First operand 13521 states and 22519 transitions. Second operand  has 5 states, 5 states have (on average 1623.4) internal successors, (8117), 5 states have internal predecessors, (8117), 0 states have call successors, (0), 0 states 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 02:16:36,815 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:16:36,815 INFO  L93              Difference]: Finished difference Result 47194 states and 78193 transitions.
[2023-11-29 02:16:36,815 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:16:36,817 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1623.4) internal successors, (8117), 5 states have internal predecessors, (8117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9004
[2023-11-29 02:16:36,823 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:16:36,843 INFO  L225             Difference]: With dead ends: 47194
[2023-11-29 02:16:36,844 INFO  L226             Difference]: Without dead ends: 25123
[2023-11-29 02:16:36,854 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18007 GetRequests, 17998 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 02:16:36,855 INFO  L413           NwaCegarLoop]: 32043 mSDtfsCounter, 34996 mSDsluCounter, 46294 mSDsCounter, 0 mSdLazyCounter, 21789 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34996 SdHoareTripleChecker+Valid, 78337 SdHoareTripleChecker+Invalid, 23004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 21789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time
[2023-11-29 02:16:36,855 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34996 Valid, 78337 Invalid, 23004 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 21789 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time]
[2023-11-29 02:16:36,880 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25123 states.
[2023-11-29 02:16:37,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 13523.
[2023-11-29 02:16:37,037 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13523 states, 13522 states have (on average 1.665508060937731) internal successors, (22521), 13522 states have internal predecessors, (22521), 0 states have call successors, (0), 0 states 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 02:16:37,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 22521 transitions.
[2023-11-29 02:16:37,054 INFO  L78                 Accepts]: Start accepts. Automaton has 13523 states and 22521 transitions. Word has length 9004
[2023-11-29 02:16:37,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:16:37,058 INFO  L495      AbstractCegarLoop]: Abstraction has 13523 states and 22521 transitions.
[2023-11-29 02:16:37,060 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1623.4) internal successors, (8117), 5 states have internal predecessors, (8117), 0 states have call successors, (0), 0 states 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 02:16:37,060 INFO  L276                IsEmpty]: Start isEmpty. Operand 13523 states and 22521 transitions.
[2023-11-29 02:16:37,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9006
[2023-11-29 02:16:37,413 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:16:37,415 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:37,545 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 02:16:37,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-29 02:16:37,616 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:16:37,617 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:16:37,618 INFO  L85        PathProgramCache]: Analyzing trace with hash -708339460, now seen corresponding path program 1 times
[2023-11-29 02:16:37,619 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:16:37,619 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556415632]
[2023-11-29 02:16:37,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:37,620 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:16:38,533 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:16:38,533 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363665402]
[2023-11-29 02:16:38,535 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:16:38,535 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:16:38,535 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:16:38,536 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:16:38,538 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 02:16:50,992 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:16:51,302 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45337 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:16:51,422 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:16:52,625 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 26 proven. 675 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2023-11-29 02:16:52,625 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:16:52,802 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked.
[2023-11-29 02:16:52,802 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:16:52,802 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556415632]
[2023-11-29 02:16:52,803 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:16:52,803 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363665402]
[2023-11-29 02:16:52,803 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [363665402] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:16:52,803 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:16:52,809 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:16:52,809 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753726540]
[2023-11-29 02:16:52,809 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:16:52,813 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:16:52,813 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:16:52,818 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:16:52,818 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:16:52,820 INFO  L87              Difference]: Start difference. First operand 13523 states and 22521 transitions. Second operand  has 5 states, 5 states have (on average 1624.0) internal successors, (8120), 5 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states 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 02:17:07,882 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:17:07,883 INFO  L93              Difference]: Finished difference Result 47202 states and 78201 transitions.
[2023-11-29 02:17:07,883 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:17:07,884 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1624.0) internal successors, (8120), 5 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9005
[2023-11-29 02:17:07,890 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:17:07,904 INFO  L225             Difference]: With dead ends: 47202
[2023-11-29 02:17:07,904 INFO  L226             Difference]: Without dead ends: 25124
[2023-11-29 02:17:07,910 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18009 GetRequests, 18000 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 02:17:07,910 INFO  L413           NwaCegarLoop]: 32035 mSDtfsCounter, 50658 mSDsluCounter, 31837 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50658 SdHoareTripleChecker+Valid, 63872 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time
[2023-11-29 02:17:07,911 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50658 Valid, 63872 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time]
[2023-11-29 02:17:07,933 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25124 states.
[2023-11-29 02:17:08,065 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25124 to 13525.
[2023-11-29 02:17:08,077 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13525 states, 13524 states have (on average 1.6654096421177167) internal successors, (22523), 13524 states have internal predecessors, (22523), 0 states have call successors, (0), 0 states 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 02:17:08,094 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13525 states to 13525 states and 22523 transitions.
[2023-11-29 02:17:08,094 INFO  L78                 Accepts]: Start accepts. Automaton has 13525 states and 22523 transitions. Word has length 9005
[2023-11-29 02:17:08,099 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:17:08,099 INFO  L495      AbstractCegarLoop]: Abstraction has 13525 states and 22523 transitions.
[2023-11-29 02:17:08,100 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1624.0) internal successors, (8120), 5 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states 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 02:17:08,100 INFO  L276                IsEmpty]: Start isEmpty. Operand 13525 states and 22523 transitions.
[2023-11-29 02:17:08,416 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9007
[2023-11-29 02:17:08,416 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:17:08,418 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 02:17:08,550 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2023-11-29 02:17:08,619 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 02:17:08,619 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:17:08,619 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:17:08,621 INFO  L85        PathProgramCache]: Analyzing trace with hash 1205826808, now seen corresponding path program 1 times
[2023-11-29 02:17:08,621 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:17:08,621 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578647423]
[2023-11-29 02:17:08,622 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:17:08,622 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:17:09,528 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:17:09,529 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946259544]
[2023-11-29 02:17:09,530 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:17:09,530 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:17:09,531 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:17:09,531 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:17:09,532 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 02:17:21,976 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:17:22,282 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45340 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:17:22,386 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:17:23,500 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 28 proven. 675 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked.
[2023-11-29 02:17:23,500 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:17:23,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked.
[2023-11-29 02:17:23,670 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:17:23,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578647423]
[2023-11-29 02:17:23,670 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:17:23,670 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946259544]
[2023-11-29 02:17:23,670 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [946259544] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:17:23,670 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:17:23,674 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:17:23,675 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413646646]
[2023-11-29 02:17:23,675 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:17:23,679 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:17:23,680 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:17:23,686 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:17:23,687 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:17:23,689 INFO  L87              Difference]: Start difference. First operand 13525 states and 22523 transitions. Second operand  has 5 states, 5 states have (on average 1624.6) internal successors, (8123), 5 states have internal predecessors, (8123), 0 states have call successors, (0), 0 states 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 02:17:39,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:17:39,443 INFO  L93              Difference]: Finished difference Result 47210 states and 78209 transitions.
[2023-11-29 02:17:39,444 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:17:39,445 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1624.6) internal successors, (8123), 5 states have internal predecessors, (8123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9006
[2023-11-29 02:17:39,451 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:17:39,470 INFO  L225             Difference]: With dead ends: 47210
[2023-11-29 02:17:39,470 INFO  L226             Difference]: Without dead ends: 25125
[2023-11-29 02:17:39,482 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18011 GetRequests, 18002 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 02:17:39,483 INFO  L413           NwaCegarLoop]: 32027 mSDtfsCounter, 50650 mSDsluCounter, 31832 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50650 SdHoareTripleChecker+Valid, 63859 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time
[2023-11-29 02:17:39,483 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50650 Valid, 63859 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time]
[2023-11-29 02:17:39,507 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25125 states.
[2023-11-29 02:17:39,642 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25125 to 13527.
[2023-11-29 02:17:39,654 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13527 states, 13526 states have (on average 1.6653112524027798) internal successors, (22525), 13526 states have internal predecessors, (22525), 0 states have call successors, (0), 0 states 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 02:17:39,670 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13527 states to 13527 states and 22525 transitions.
[2023-11-29 02:17:39,670 INFO  L78                 Accepts]: Start accepts. Automaton has 13527 states and 22525 transitions. Word has length 9006
[2023-11-29 02:17:39,674 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:17:39,674 INFO  L495      AbstractCegarLoop]: Abstraction has 13527 states and 22525 transitions.
[2023-11-29 02:17:39,676 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1624.6) internal successors, (8123), 5 states have internal predecessors, (8123), 0 states have call successors, (0), 0 states 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 02:17:39,676 INFO  L276                IsEmpty]: Start isEmpty. Operand 13527 states and 22525 transitions.
[2023-11-29 02:17:39,976 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9008
[2023-11-29 02:17:39,976 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:17:39,978 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:17:40,110 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-29 02:17:40,178 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 02:17:40,179 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:17:40,180 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:17:40,183 INFO  L85        PathProgramCache]: Analyzing trace with hash -268554984, now seen corresponding path program 1 times
[2023-11-29 02:17:40,183 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:17:40,184 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912706897]
[2023-11-29 02:17:40,186 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:17:40,186 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:17:41,071 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:17:41,071 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488340765]
[2023-11-29 02:17:41,073 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:17:41,073 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:17:41,073 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:17:41,074 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:17:41,075 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 02:17:52,966 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:17:53,273 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45344 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:17:53,380 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:17:54,445 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 30 proven. 675 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked.
[2023-11-29 02:17:54,445 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:17:54,641 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked.
[2023-11-29 02:17:54,641 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:17:54,641 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912706897]
[2023-11-29 02:17:54,641 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:17:54,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488340765]
[2023-11-29 02:17:54,642 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488340765] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:17:54,642 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:17:54,647 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:17:54,647 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847336285]
[2023-11-29 02:17:54,647 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:17:54,652 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:17:54,652 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:17:54,656 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:17:54,657 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:17:54,659 INFO  L87              Difference]: Start difference. First operand 13527 states and 22525 transitions. Second operand  has 5 states, 5 states have (on average 1625.2) internal successors, (8126), 5 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states 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 02:18:10,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:18:10,069 INFO  L93              Difference]: Finished difference Result 47218 states and 78217 transitions.
[2023-11-29 02:18:10,069 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:18:10,070 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1625.2) internal successors, (8126), 5 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9007
[2023-11-29 02:18:10,076 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:18:10,093 INFO  L225             Difference]: With dead ends: 47218
[2023-11-29 02:18:10,093 INFO  L226             Difference]: Without dead ends: 25126
[2023-11-29 02:18:10,101 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18013 GetRequests, 18004 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 02:18:10,101 INFO  L413           NwaCegarLoop]: 32019 mSDtfsCounter, 50629 mSDsluCounter, 31828 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50629 SdHoareTripleChecker+Valid, 63847 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time
[2023-11-29 02:18:10,102 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50629 Valid, 63847 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time]
[2023-11-29 02:18:10,124 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25126 states.
[2023-11-29 02:18:10,258 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25126 to 13529.
[2023-11-29 02:18:10,271 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13529 states, 13528 states have (on average 1.6652128917800118) internal successors, (22527), 13528 states have internal predecessors, (22527), 0 states have call successors, (0), 0 states 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 02:18:10,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13529 states to 13529 states and 22527 transitions.
[2023-11-29 02:18:10,288 INFO  L78                 Accepts]: Start accepts. Automaton has 13529 states and 22527 transitions. Word has length 9007
[2023-11-29 02:18:10,293 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:18:10,293 INFO  L495      AbstractCegarLoop]: Abstraction has 13529 states and 22527 transitions.
[2023-11-29 02:18:10,294 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1625.2) internal successors, (8126), 5 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states 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 02:18:10,294 INFO  L276                IsEmpty]: Start isEmpty. Operand 13529 states and 22527 transitions.
[2023-11-29 02:18:10,595 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9009
[2023-11-29 02:18:10,595 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:18:10,596 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:18:10,724 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-29 02:18:10,797 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 02:18:10,797 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:18:10,797 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:18:10,798 INFO  L85        PathProgramCache]: Analyzing trace with hash -147726112, now seen corresponding path program 1 times
[2023-11-29 02:18:10,798 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:18:10,799 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014318299]
[2023-11-29 02:18:10,799 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:18:10,799 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:18:11,717 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:18:11,717 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595683380]
[2023-11-29 02:18:11,719 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:18:11,719 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:18:11,719 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:18:11,720 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:18:11,721 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 02:18:23,400 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:18:23,695 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45347 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:18:23,799 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:18:24,782 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 32 proven. 675 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked.
[2023-11-29 02:18:24,783 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:18:24,953 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked.
[2023-11-29 02:18:24,953 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:18:24,953 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014318299]
[2023-11-29 02:18:24,953 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:18:24,953 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595683380]
[2023-11-29 02:18:24,953 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595683380] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:18:24,953 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:18:24,959 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:18:24,960 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437751305]
[2023-11-29 02:18:24,960 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:18:24,964 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:18:24,964 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:18:24,968 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:18:24,968 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:18:24,970 INFO  L87              Difference]: Start difference. First operand 13529 states and 22527 transitions. Second operand  has 5 states, 5 states have (on average 1625.8) internal successors, (8129), 5 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states 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 02:18:41,427 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:18:41,427 INFO  L93              Difference]: Finished difference Result 47226 states and 78225 transitions.
[2023-11-29 02:18:41,428 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:18:41,429 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1625.8) internal successors, (8129), 5 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9008
[2023-11-29 02:18:41,435 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:18:41,450 INFO  L225             Difference]: With dead ends: 47226
[2023-11-29 02:18:41,450 INFO  L226             Difference]: Without dead ends: 25127
[2023-11-29 02:18:41,458 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18015 GetRequests, 18006 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 02:18:41,459 INFO  L413           NwaCegarLoop]: 32011 mSDtfsCounter, 34976 mSDsluCounter, 46262 mSDsCounter, 0 mSdLazyCounter, 21789 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34976 SdHoareTripleChecker+Valid, 78273 SdHoareTripleChecker+Invalid, 23004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 21789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time
[2023-11-29 02:18:41,459 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34976 Valid, 78273 Invalid, 23004 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 21789 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time]
[2023-11-29 02:18:41,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25127 states.
[2023-11-29 02:18:41,594 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25127 to 13531.
[2023-11-29 02:18:41,606 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13531 states, 13530 states have (on average 1.6651145602365114) internal successors, (22529), 13530 states have internal predecessors, (22529), 0 states have call successors, (0), 0 states 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 02:18:41,620 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13531 states to 13531 states and 22529 transitions.
[2023-11-29 02:18:41,621 INFO  L78                 Accepts]: Start accepts. Automaton has 13531 states and 22529 transitions. Word has length 9008
[2023-11-29 02:18:41,625 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:18:41,625 INFO  L495      AbstractCegarLoop]: Abstraction has 13531 states and 22529 transitions.
[2023-11-29 02:18:41,626 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1625.8) internal successors, (8129), 5 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states 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 02:18:41,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 13531 states and 22529 transitions.
[2023-11-29 02:18:41,923 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9010
[2023-11-29 02:18:41,923 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:18:41,925 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:42,041 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-29 02:18:42,125 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 02:18:42,126 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:18:42,126 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:18:42,127 INFO  L85        PathProgramCache]: Analyzing trace with hash 1330225586, now seen corresponding path program 1 times
[2023-11-29 02:18:42,127 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:18:42,127 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381357801]
[2023-11-29 02:18:42,128 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:18:42,128 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:18:42,940 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:18:42,940 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894026437]
[2023-11-29 02:18:42,942 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:18:42,942 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:18:42,942 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:18:42,943 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:18:43,124 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 02:18:54,510 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:18:54,804 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45350 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:18:54,904 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:18:55,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 34 proven. 675 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked.
[2023-11-29 02:18:55,901 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:18:56,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 878 trivial. 0 not checked.
[2023-11-29 02:18:56,073 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:18:56,073 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381357801]
[2023-11-29 02:18:56,073 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:18:56,073 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894026437]
[2023-11-29 02:18:56,073 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894026437] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:18:56,073 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:18:56,078 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:18:56,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455594417]
[2023-11-29 02:18:56,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:18:56,082 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:18:56,082 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:18:56,086 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:18:56,086 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:18:56,088 INFO  L87              Difference]: Start difference. First operand 13531 states and 22529 transitions. Second operand  has 5 states, 5 states have (on average 1626.4) internal successors, (8132), 5 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states 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 02:19:10,647 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:19:10,647 INFO  L93              Difference]: Finished difference Result 47234 states and 78233 transitions.
[2023-11-29 02:19:10,647 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:19:10,649 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1626.4) internal successors, (8132), 5 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9009
[2023-11-29 02:19:10,655 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:19:10,673 INFO  L225             Difference]: With dead ends: 47234
[2023-11-29 02:19:10,674 INFO  L226             Difference]: Without dead ends: 25128
[2023-11-29 02:19:10,686 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18017 GetRequests, 18008 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 02:19:10,687 INFO  L413           NwaCegarLoop]: 32003 mSDtfsCounter, 50611 mSDsluCounter, 31818 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50611 SdHoareTripleChecker+Valid, 63821 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time
[2023-11-29 02:19:10,687 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50611 Valid, 63821 Invalid, 18140 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time]
[2023-11-29 02:19:10,710 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25128 states.
[2023-11-29 02:19:10,837 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25128 to 13533.
[2023-11-29 02:19:10,848 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13533 states, 13532 states have (on average 1.6650162577593852) internal successors, (22531), 13532 states have internal predecessors, (22531), 0 states have call successors, (0), 0 states 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 02:19:10,864 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13533 states to 13533 states and 22531 transitions.
[2023-11-29 02:19:10,864 INFO  L78                 Accepts]: Start accepts. Automaton has 13533 states and 22531 transitions. Word has length 9009
[2023-11-29 02:19:10,868 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:19:10,868 INFO  L495      AbstractCegarLoop]: Abstraction has 13533 states and 22531 transitions.
[2023-11-29 02:19:10,870 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1626.4) internal successors, (8132), 5 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states 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 02:19:10,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 13533 states and 22531 transitions.
[2023-11-29 02:19:11,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9011
[2023-11-29 02:19:11,166 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:19:11,168 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:19:11,286 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-29 02:19:11,368 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 02:19:11,369 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:19:11,369 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:19:11,371 INFO  L85        PathProgramCache]: Analyzing trace with hash 1395990854, now seen corresponding path program 1 times
[2023-11-29 02:19:11,371 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:19:11,371 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335101200]
[2023-11-29 02:19:11,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:19:11,373 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:19:12,338 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:19:12,339 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361019586]
[2023-11-29 02:19:12,340 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:19:12,340 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:19:12,340 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:19:12,341 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:19:12,342 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 02:19:24,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:19:24,416 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45353 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 02:19:24,516 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:19:25,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 36 proven. 675 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked.
[2023-11-29 02:19:25,442 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:19:25,641 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked.
[2023-11-29 02:19:25,642 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:19:25,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335101200]
[2023-11-29 02:19:25,642 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:19:25,642 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361019586]
[2023-11-29 02:19:25,642 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361019586] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:19:25,642 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:19:25,646 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-29 02:19:25,646 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105376982]
[2023-11-29 02:19:25,647 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:19:25,650 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 02:19:25,650 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:19:25,654 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 02:19:25,654 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2023-11-29 02:19:25,656 INFO  L87              Difference]: Start difference. First operand 13533 states and 22531 transitions. Second operand  has 6 states, 6 states have (on average 1355.8333333333333) internal successors, (8135), 6 states have internal predecessors, (8135), 0 states have call successors, (0), 0 states 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 02:19:53,762 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:19:53,762 INFO  L93              Difference]: Finished difference Result 58926 states and 97691 transitions.
[2023-11-29 02:19:53,762 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-29 02:19:53,764 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1355.8333333333333) internal successors, (8135), 6 states have internal predecessors, (8135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9010
[2023-11-29 02:19:53,770 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:19:53,798 INFO  L225             Difference]: With dead ends: 58926
[2023-11-29 02:19:53,798 INFO  L226             Difference]: Without dead ends: 36813
[2023-11-29 02:19:53,813 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18020 GetRequests, 18008 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 02:19:53,814 INFO  L413           NwaCegarLoop]: 31997 mSDtfsCounter, 69966 mSDsluCounter, 77452 mSDsCounter, 0 mSdLazyCounter, 36048 mSolverCounterSat, 1217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69966 SdHoareTripleChecker+Valid, 109449 SdHoareTripleChecker+Invalid, 37265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1217 IncrementalHoareTripleChecker+Valid, 36048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.7s IncrementalHoareTripleChecker+Time
[2023-11-29 02:19:53,814 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [69966 Valid, 109449 Invalid, 37265 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1217 Valid, 36048 Invalid, 0 Unknown, 0 Unchecked, 26.7s Time]
[2023-11-29 02:19:53,846 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36813 states.
[2023-11-29 02:19:54,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36813 to 13535.
[2023-11-29 02:19:54,022 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13535 states, 13534 states have (on average 1.6649179843357471) internal successors, (22533), 13534 states have internal predecessors, (22533), 0 states have call successors, (0), 0 states 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 02:19:54,037 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13535 states to 13535 states and 22533 transitions.
[2023-11-29 02:19:54,037 INFO  L78                 Accepts]: Start accepts. Automaton has 13535 states and 22533 transitions. Word has length 9010
[2023-11-29 02:19:54,041 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:19:54,042 INFO  L495      AbstractCegarLoop]: Abstraction has 13535 states and 22533 transitions.
[2023-11-29 02:19:54,043 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1355.8333333333333) internal successors, (8135), 6 states have internal predecessors, (8135), 0 states have call successors, (0), 0 states 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 02:19:54,043 INFO  L276                IsEmpty]: Start isEmpty. Operand 13535 states and 22533 transitions.
[2023-11-29 02:19:54,469 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9012
[2023-11-29 02:19:54,469 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:19:54,471 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:19:54,589 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 02:19:54,671 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:19:54,671 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:19:54,673 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:19:54,674 INFO  L85        PathProgramCache]: Analyzing trace with hash 936287950, now seen corresponding path program 1 times
[2023-11-29 02:19:54,674 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:19:54,674 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853195404]
[2023-11-29 02:19:54,675 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:19:54,675 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:19:55,477 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:19:55,477 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981457518]
[2023-11-29 02:19:55,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:19:55,479 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:19:55,479 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:19:55,480 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:19:55,480 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 02:20:07,305 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:20:07,603 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45357 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:20:07,704 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:20:08,660 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 38 proven. 675 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked.
[2023-11-29 02:20:08,661 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:20:09,107 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked.
[2023-11-29 02:20:09,107 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:20:09,107 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853195404]
[2023-11-29 02:20:09,107 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:20:09,107 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981457518]
[2023-11-29 02:20:09,107 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981457518] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:20:09,108 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:20:09,113 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:20:09,113 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224863753]
[2023-11-29 02:20:09,113 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:20:09,118 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:20:09,118 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:20:09,121 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:20:09,122 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:20:09,124 INFO  L87              Difference]: Start difference. First operand 13535 states and 22533 transitions. Second operand  has 5 states, 5 states have (on average 1627.6) internal successors, (8138), 5 states have internal predecessors, (8138), 0 states have call successors, (0), 0 states 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 02:20:25,628 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:20:25,628 INFO  L93              Difference]: Finished difference Result 47250 states and 78249 transitions.
[2023-11-29 02:20:25,628 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:20:25,630 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1627.6) internal successors, (8138), 5 states have internal predecessors, (8138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9011
[2023-11-29 02:20:25,636 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:20:25,880 INFO  L225             Difference]: With dead ends: 47250
[2023-11-29 02:20:25,881 INFO  L226             Difference]: Without dead ends: 25130
[2023-11-29 02:20:25,886 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18021 GetRequests, 18012 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 02:20:25,886 INFO  L413           NwaCegarLoop]: 31987 mSDtfsCounter, 34961 mSDsluCounter, 46238 mSDsCounter, 0 mSdLazyCounter, 21789 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34961 SdHoareTripleChecker+Valid, 78225 SdHoareTripleChecker+Invalid, 23004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 21789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time
[2023-11-29 02:20:25,887 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34961 Valid, 78225 Invalid, 23004 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 21789 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time]
[2023-11-29 02:20:25,904 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25130 states.
[2023-11-29 02:20:26,012 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25130 to 13537.
[2023-11-29 02:20:26,023 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13537 states, 13536 states have (on average 1.6648197399527187) internal successors, (22535), 13536 states have internal predecessors, (22535), 0 states have call successors, (0), 0 states 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 02:20:26,038 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13537 states to 13537 states and 22535 transitions.
[2023-11-29 02:20:26,038 INFO  L78                 Accepts]: Start accepts. Automaton has 13537 states and 22535 transitions. Word has length 9011
[2023-11-29 02:20:26,042 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:20:26,043 INFO  L495      AbstractCegarLoop]: Abstraction has 13537 states and 22535 transitions.
[2023-11-29 02:20:26,044 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1627.6) internal successors, (8138), 5 states have internal predecessors, (8138), 0 states have call successors, (0), 0 states 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 02:20:26,044 INFO  L276                IsEmpty]: Start isEmpty. Operand 13537 states and 22535 transitions.
[2023-11-29 02:20:26,341 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9013
[2023-11-29 02:20:26,341 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:20:26,342 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:26,461 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 02:20:26,543 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:26,543 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:20:26,543 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:20:26,544 INFO  L85        PathProgramCache]: Analyzing trace with hash 263953966, now seen corresponding path program 1 times
[2023-11-29 02:20:26,544 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:20:26,544 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198061482]
[2023-11-29 02:20:26,545 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:26,545 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:20:27,347 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:20:27,347 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505567908]
[2023-11-29 02:20:27,349 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:27,349 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:27,349 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:20:27,350 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:20:27,350 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 02:20:39,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:20:39,516 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45360 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:20:39,613 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:20:40,574 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 675 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked.
[2023-11-29 02:20:40,574 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:20:40,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked.
[2023-11-29 02:20:40,952 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:20:40,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198061482]
[2023-11-29 02:20:40,952 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:20:40,952 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505567908]
[2023-11-29 02:20:40,952 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505567908] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:20:40,952 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:20:40,958 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:20:40,959 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670956077]
[2023-11-29 02:20:40,959 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:20:40,962 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:20:40,963 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:20:40,966 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:20:40,966 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:20:40,968 INFO  L87              Difference]: Start difference. First operand 13537 states and 22535 transitions. Second operand  has 5 states, 5 states have (on average 1628.2) internal successors, (8141), 5 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states 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 02:20:56,218 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:20:56,219 INFO  L93              Difference]: Finished difference Result 47258 states and 78257 transitions.
[2023-11-29 02:20:56,219 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:20:56,220 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1628.2) internal successors, (8141), 5 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9012
[2023-11-29 02:20:56,225 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:20:56,238 INFO  L225             Difference]: With dead ends: 47258
[2023-11-29 02:20:56,238 INFO  L226             Difference]: Without dead ends: 25131
[2023-11-29 02:20:56,243 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18023 GetRequests, 18014 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 02:20:56,244 INFO  L413           NwaCegarLoop]: 31979 mSDtfsCounter, 50584 mSDsluCounter, 31803 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50584 SdHoareTripleChecker+Valid, 63782 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time
[2023-11-29 02:20:56,244 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50584 Valid, 63782 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time]
[2023-11-29 02:20:56,262 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25131 states.
[2023-11-29 02:20:56,376 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 13539.
[2023-11-29 02:20:56,387 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13539 states, 13538 states have (on average 1.6647215245974294) internal successors, (22537), 13538 states have internal predecessors, (22537), 0 states have call successors, (0), 0 states 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 02:20:56,402 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13539 states to 13539 states and 22537 transitions.
[2023-11-29 02:20:56,402 INFO  L78                 Accepts]: Start accepts. Automaton has 13539 states and 22537 transitions. Word has length 9012
[2023-11-29 02:20:56,407 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:20:56,407 INFO  L495      AbstractCegarLoop]: Abstraction has 13539 states and 22537 transitions.
[2023-11-29 02:20:56,408 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1628.2) internal successors, (8141), 5 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states 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 02:20:56,408 INFO  L276                IsEmpty]: Start isEmpty. Operand 13539 states and 22537 transitions.
[2023-11-29 02:20:56,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9014
[2023-11-29 02:20:56,706 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:20:56,707 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:20:56,829 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 02:20:56,908 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-29 02:20:56,908 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:20:56,909 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:20:56,910 INFO  L85        PathProgramCache]: Analyzing trace with hash 41217896, now seen corresponding path program 1 times
[2023-11-29 02:20:56,910 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:20:56,910 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739335275]
[2023-11-29 02:20:56,911 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:56,911 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:20:57,756 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:20:57,756 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586642008]
[2023-11-29 02:20:57,758 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:20:57,758 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:20:57,758 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:20:57,759 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:20:57,759 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 02:21:10,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:21:10,373 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45363 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:21:10,468 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:21:11,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 42 proven. 675 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2023-11-29 02:21:11,477 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:21:11,678 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked.
[2023-11-29 02:21:11,678 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:21:11,678 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739335275]
[2023-11-29 02:21:11,678 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:21:11,678 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586642008]
[2023-11-29 02:21:11,678 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [586642008] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:21:11,678 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:21:11,683 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:21:11,683 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296502671]
[2023-11-29 02:21:11,683 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:21:11,687 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:21:11,687 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:21:11,690 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:21:11,690 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:21:11,692 INFO  L87              Difference]: Start difference. First operand 13539 states and 22537 transitions. Second operand  has 5 states, 5 states have (on average 1628.8) internal successors, (8144), 5 states have internal predecessors, (8144), 0 states have call successors, (0), 0 states 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 02:21:26,796 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:21:26,797 INFO  L93              Difference]: Finished difference Result 47266 states and 78265 transitions.
[2023-11-29 02:21:26,797 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:21:26,798 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1628.8) internal successors, (8144), 5 states have internal predecessors, (8144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9013
[2023-11-29 02:21:26,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:21:26,820 INFO  L225             Difference]: With dead ends: 47266
[2023-11-29 02:21:26,821 INFO  L226             Difference]: Without dead ends: 25132
[2023-11-29 02:21:26,830 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18025 GetRequests, 18016 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 02:21:26,831 INFO  L413           NwaCegarLoop]: 31971 mSDtfsCounter, 50594 mSDsluCounter, 31797 mSDsCounter, 0 mSdLazyCounter, 16925 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50594 SdHoareTripleChecker+Valid, 63768 SdHoareTripleChecker+Invalid, 18140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 16925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time
[2023-11-29 02:21:26,831 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [50594 Valid, 63768 Invalid, 18140 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1215 Valid, 16925 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time]
[2023-11-29 02:21:26,852 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25132 states.
[2023-11-29 02:21:26,973 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25132 to 13541.
[2023-11-29 02:21:26,985 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13541 states, 13540 states have (on average 1.6646233382570161) internal successors, (22539), 13540 states have internal predecessors, (22539), 0 states have call successors, (0), 0 states 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 02:21:27,001 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13541 states to 13541 states and 22539 transitions.
[2023-11-29 02:21:27,001 INFO  L78                 Accepts]: Start accepts. Automaton has 13541 states and 22539 transitions. Word has length 9013
[2023-11-29 02:21:27,005 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:21:27,005 INFO  L495      AbstractCegarLoop]: Abstraction has 13541 states and 22539 transitions.
[2023-11-29 02:21:27,006 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1628.8) internal successors, (8144), 5 states have internal predecessors, (8144), 0 states have call successors, (0), 0 states 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 02:21:27,006 INFO  L276                IsEmpty]: Start isEmpty. Operand 13541 states and 22539 transitions.
[2023-11-29 02:21:27,334 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9015
[2023-11-29 02:21:27,335 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:21:27,336 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:21:27,455 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 02:21:27,536 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2023-11-29 02:21:27,537 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:21:27,538 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:21:27,539 INFO  L85        PathProgramCache]: Analyzing trace with hash 1641734804, now seen corresponding path program 1 times
[2023-11-29 02:21:27,539 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:21:27,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553361891]
[2023-11-29 02:21:27,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:21:27,540 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:21:28,342 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:21:28,342 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543556349]
[2023-11-29 02:21:28,344 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:21:28,344 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:21:28,344 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:21:28,345 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:21:28,346 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 02:21:40,213 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:21:40,495 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45366 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:21:40,592 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:21:41,566 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 44 proven. 675 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked.
[2023-11-29 02:21:41,566 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:21:41,762 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked.
[2023-11-29 02:21:41,763 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:21:41,763 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553361891]
[2023-11-29 02:21:41,763 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:21:41,763 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543556349]
[2023-11-29 02:21:41,763 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543556349] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:21:41,763 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:21:41,768 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:21:41,768 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396348061]
[2023-11-29 02:21:41,768 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:21:41,771 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:21:41,772 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:21:41,775 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:21:41,775 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:21:41,777 INFO  L87              Difference]: Start difference. First operand 13541 states and 22539 transitions. Second operand  has 5 states, 5 states have (on average 1629.4) internal successors, (8147), 5 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states 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 02:21:58,919 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:21:58,919 INFO  L93              Difference]: Finished difference Result 47274 states and 78273 transitions.
[2023-11-29 02:21:58,919 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:21:58,921 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1629.4) internal successors, (8147), 5 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9014
[2023-11-29 02:21:58,927 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:21:58,945 INFO  L225             Difference]: With dead ends: 47274
[2023-11-29 02:21:58,945 INFO  L226             Difference]: Without dead ends: 25133
[2023-11-29 02:21:58,956 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18027 GetRequests, 18018 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 02:21:58,956 INFO  L413           NwaCegarLoop]: 31963 mSDtfsCounter, 34926 mSDsluCounter, 48454 mSDsCounter, 0 mSdLazyCounter, 22665 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34926 SdHoareTripleChecker+Valid, 80417 SdHoareTripleChecker+Invalid, 23880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 22665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-29 02:21:58,957 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34926 Valid, 80417 Invalid, 23880 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 22665 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-29 02:21:58,979 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25133 states.
[2023-11-29 02:21:59,105 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25133 to 13543.
[2023-11-29 02:21:59,117 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13543 states, 13542 states have (on average 1.6645251809186234) internal successors, (22541), 13542 states have internal predecessors, (22541), 0 states have call successors, (0), 0 states 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 02:21:59,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13543 states to 13543 states and 22541 transitions.
[2023-11-29 02:21:59,133 INFO  L78                 Accepts]: Start accepts. Automaton has 13543 states and 22541 transitions. Word has length 9014
[2023-11-29 02:21:59,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:21:59,137 INFO  L495      AbstractCegarLoop]: Abstraction has 13543 states and 22541 transitions.
[2023-11-29 02:21:59,138 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1629.4) internal successors, (8147), 5 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states 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 02:21:59,139 INFO  L276                IsEmpty]: Start isEmpty. Operand 13543 states and 22541 transitions.
[2023-11-29 02:21:59,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9016
[2023-11-29 02:21:59,467 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:21:59,469 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 02:21:59,586 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0
[2023-11-29 02:21:59,669 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22
[2023-11-29 02:21:59,670 INFO  L420      AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:21:59,671 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:21:59,672 INFO  L85        PathProgramCache]: Analyzing trace with hash -656321148, now seen corresponding path program 1 times
[2023-11-29 02:21:59,672 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:21:59,672 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453945817]
[2023-11-29 02:21:59,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:21:59,673 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:22:00,483 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:22:00,483 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456108735]
[2023-11-29 02:22:00,485 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:22:00,485 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:22:00,485 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:22:00,486 INFO  L229       MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:22:00,487 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process
[2023-11-29 02:22:12,317 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:22:12,612 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45370 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:22:12,749 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:22:13,923 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked.
[2023-11-29 02:22:13,923 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:22:14,112 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked.
[2023-11-29 02:22:14,113 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:22:14,113 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453945817]
[2023-11-29 02:22:14,113 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:22:14,113 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456108735]
[2023-11-29 02:22:14,113 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456108735] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:22:14,113 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:22:14,119 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:22:14,119 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931157521]
[2023-11-29 02:22:14,120 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:22:14,123 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:22:14,123 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:22:14,127 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:22:14,127 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:22:14,129 INFO  L87              Difference]: Start difference. First operand 13543 states and 22541 transitions. Second operand  has 5 states, 5 states have (on average 1630.0) internal successors, (8150), 5 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states 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 02:22:31,260 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 02:22:31,260 INFO  L93              Difference]: Finished difference Result 47282 states and 78281 transitions.
[2023-11-29 02:22:31,260 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 02:22:31,262 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1630.0) internal successors, (8150), 5 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9015
[2023-11-29 02:22:31,268 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 02:22:31,283 INFO  L225             Difference]: With dead ends: 47282
[2023-11-29 02:22:31,283 INFO  L226             Difference]: Without dead ends: 25134
[2023-11-29 02:22:31,290 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 18029 GetRequests, 18020 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2023-11-29 02:22:31,291 INFO  L413           NwaCegarLoop]: 31955 mSDtfsCounter, 34920 mSDsluCounter, 48444 mSDsCounter, 0 mSdLazyCounter, 22665 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34920 SdHoareTripleChecker+Valid, 80399 SdHoareTripleChecker+Invalid, 23880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 22665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time
[2023-11-29 02:22:31,291 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34920 Valid, 80399 Invalid, 23880 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1215 Valid, 22665 Invalid, 0 Unknown, 0 Unchecked, 16.3s Time]
[2023-11-29 02:22:31,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25134 states.
[2023-11-29 02:22:31,429 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25134 to 13545.
[2023-11-29 02:22:31,441 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13545 states, 13544 states have (on average 1.6644270525694034) internal successors, (22543), 13544 states have internal predecessors, (22543), 0 states have call successors, (0), 0 states 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 02:22:31,456 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13545 states to 13545 states and 22543 transitions.
[2023-11-29 02:22:31,456 INFO  L78                 Accepts]: Start accepts. Automaton has 13545 states and 22543 transitions. Word has length 9015
[2023-11-29 02:22:31,460 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 02:22:31,460 INFO  L495      AbstractCegarLoop]: Abstraction has 13545 states and 22543 transitions.
[2023-11-29 02:22:31,461 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1630.0) internal successors, (8150), 5 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states 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 02:22:31,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 13545 states and 22543 transitions.
[2023-11-29 02:22:31,758 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9017
[2023-11-29 02:22:31,759 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 02:22:31,760 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 02:22:31,880 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0
[2023-11-29 02:22:31,960 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2023-11-29 02:22:31,961 INFO  L420      AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 02:22:31,961 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 02:22:31,962 INFO  L85        PathProgramCache]: Analyzing trace with hash 669347964, now seen corresponding path program 1 times
[2023-11-29 02:22:31,962 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 02:22:31,962 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619510462]
[2023-11-29 02:22:31,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:22:31,963 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 02:22:32,836 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 02:22:32,836 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207752887]
[2023-11-29 02:22:32,838 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 02:22:32,838 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 02:22:32,838 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 02:22:32,839 INFO  L229       MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 02:22:32,840 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ddac79d-229d-4d84-b3be-0ea9117deb49/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process
[2023-11-29 02:22:44,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 02:22:45,028 INFO  L262         TraceCheckSpWp]: Trace formula consists of 45373 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-29 02:22:45,130 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 02:22:46,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 48 proven. 675 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked.
[2023-11-29 02:22:46,143 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 02:22:46,346 INFO  L134       CoverageAnalysis]: Checked inductivity of 912 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked.
[2023-11-29 02:22:46,346 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 02:22:46,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619510462]
[2023-11-29 02:22:46,346 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 02:22:46,346 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207752887]
[2023-11-29 02:22:46,346 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207752887] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 02:22:46,346 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 02:22:46,352 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-29 02:22:46,352 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083423351]
[2023-11-29 02:22:46,353 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 02:22:46,356 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 02:22:46,356 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 02:22:46,360 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 02:22:46,360 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2023-11-29 02:22:46,362 INFO  L87              Difference]: Start difference. First operand 13545 states and 22543 transitions. Second operand  has 5 states, 5 states have (on average 1630.6) internal successors, (8153), 5 states have internal predecessors, (8153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)