./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.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_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/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_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/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_a03b926d-7a2a-45d5-a562-d9c7f049344c/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 349f6e8de04e0c564229fd00bd54f19f7f90edab4d122098d9fddb960fbdb5ba
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-29 04:48:08,908 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-29 04:48:08,978 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-29 04:48:08,983 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-29 04:48:08,984 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-29 04:48:09,010 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-29 04:48:09,010 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-29 04:48:09,011 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-29 04:48:09,012 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-29 04:48:09,012 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-29 04:48:09,013 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-29 04:48:09,014 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-29 04:48:09,014 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-29 04:48:09,015 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-29 04:48:09,015 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-29 04:48:09,016 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-29 04:48:09,017 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-29 04:48:09,017 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-29 04:48:09,018 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-29 04:48:09,018 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-29 04:48:09,019 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-29 04:48:09,019 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-29 04:48:09,020 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-29 04:48:09,020 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-29 04:48:09,021 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-29 04:48:09,021 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-29 04:48:09,022 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-29 04:48:09,022 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-29 04:48:09,023 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 04:48:09,023 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-29 04:48:09,023 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-29 04:48:09,024 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-29 04:48:09,024 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-29 04:48:09,024 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-29 04:48:09,025 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-29 04:48:09,025 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-29 04:48:09,025 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-29 04:48:09,025 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-29 04:48:09,025 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-29 04:48:09,026 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_a03b926d-7a2a-45d5-a562-d9c7f049344c/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_a03b926d-7a2a-45d5-a562-d9c7f049344c/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 -> 349f6e8de04e0c564229fd00bd54f19f7f90edab4d122098d9fddb960fbdb5ba
[2023-11-29 04:48:09,243 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-29 04:48:09,265 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-29 04:48:09,268 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-29 04:48:09,269 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-29 04:48:09,270 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-29 04:48:09,271 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c
[2023-11-29 04:48:12,068 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-29 04:48:12,579 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-29 04:48:12,580 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c
[2023-11-29 04:48:12,630 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/data/43fa6d8c7/eba00d9ab24d40a0acf1c394e3eb5b9c/FLAG436c03a9f
[2023-11-29 04:48:12,645 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/data/43fa6d8c7/eba00d9ab24d40a0acf1c394e3eb5b9c
[2023-11-29 04:48:12,647 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-29 04:48:12,649 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-29 04:48:12,650 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-29 04:48:12,650 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-29 04:48:12,655 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-29 04:48:12,656 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:48:12" (1/1) ...
[2023-11-29 04:48:12,657 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747d61e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:12, skipping insertion in model container
[2023-11-29 04:48:12,657 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:48:12" (1/1) ...
[2023-11-29 04:48:12,841 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-29 04:48:13,111 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_a03b926d-7a2a-45d5-a562-d9c7f049344c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c[1173,1186]
[2023-11-29 04:48:14,368 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 04:48:14,378 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-29 04:48:14,390 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_a03b926d-7a2a-45d5-a562-d9c7f049344c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.7.prop1-func-interl.c[1173,1186]
[2023-11-29 04:48:15,285 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-29 04:48:15,297 INFO  L206         MainTranslator]: Completed translation
[2023-11-29 04:48:15,297 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15 WrapperNode
[2023-11-29 04:48:15,297 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-29 04:48:15,298 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-29 04:48:15,298 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-29 04:48:15,298 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-29 04:48:15,305 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:15,639 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:18,748 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52620
[2023-11-29 04:48:18,748 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-29 04:48:18,749 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-29 04:48:18,749 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-29 04:48:18,749 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-29 04:48:18,758 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:18,758 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:19,607 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:20,067 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 04:48:20,067 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:20,068 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:20,808 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:20,981 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:21,187 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:21,333 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:22,129 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-29 04:48:22,130 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-29 04:48:22,130 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-29 04:48:22,131 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-29 04:48:22,131 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (1/1) ...
[2023-11-29 04:48:22,136 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-29 04:48:22,144 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:48:22,155 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-29 04:48:22,157 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-29 04:48:22,186 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-29 04:48:22,186 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-29 04:48:22,186 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-29 04:48:22,186 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-29 04:48:24,120 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-29 04:48:24,122 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-29 04:48:48,708 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-29 04:48:49,203 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-29 04:48:49,203 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-29 04:48:49,207 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:48:49 BoogieIcfgContainer
[2023-11-29 04:48:49,207 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-29 04:48:49,210 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-29 04:48:49,210 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-29 04:48:49,213 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-29 04:48:49,213 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:48:12" (1/3) ...
[2023-11-29 04:48:49,214 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5681b128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:48:49, skipping insertion in model container
[2023-11-29 04:48:49,214 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:48:15" (2/3) ...
[2023-11-29 04:48:49,214 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5681b128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:48:49, skipping insertion in model container
[2023-11-29 04:48:49,215 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:48:49" (3/3) ...
[2023-11-29 04:48:49,216 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rether.7.prop1-func-interl.c
[2023-11-29 04:48:49,229 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-29 04:48:49,229 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-29 04:48:49,394 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-29 04:48:49,400 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;@2c23d57f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-29 04:48:49,401 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-29 04:48:49,431 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 11853 states, 11851 states have (on average 1.6667791747531855) internal successors, (19753), 11852 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states 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 04:48:49,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 553
[2023-11-29 04:48:49,466 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:48:49,468 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]
[2023-11-29 04:48:49,468 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:48:49,473 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:48:49,473 INFO  L85        PathProgramCache]: Analyzing trace with hash 1664862167, now seen corresponding path program 1 times
[2023-11-29 04:48:49,480 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:48:49,481 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374453924]
[2023-11-29 04:48:49,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:48:49,482 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:48:50,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:48:52,543 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 04:48:52,544 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:48:52,544 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374453924]
[2023-11-29 04:48:52,545 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374453924] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:48:52,545 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:48:52,546 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:48:52,547 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280230735]
[2023-11-29 04:48:52,548 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:48:52,554 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:48:52,554 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:48:52,584 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:48:52,585 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 04:48:52,613 INFO  L87              Difference]: Start difference. First operand  has 11853 states, 11851 states have (on average 1.6667791747531855) internal successors, (19753), 11852 states have internal predecessors, (19753), 0 states have call successors, (0), 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 5 states, 5 states have (on average 110.4) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 04:49:05,554 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:49:05,554 INFO  L93              Difference]: Finished difference Result 34593 states and 57655 transitions.
[2023-11-29 04:49:05,555 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 04:49:05,556 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 110.4) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 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 552
[2023-11-29 04:49:05,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:49:05,683 INFO  L225             Difference]: With dead ends: 34593
[2023-11-29 04:49:05,683 INFO  L226             Difference]: Without dead ends: 23221
[2023-11-29 04:49:05,703 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-11-29 04:49:05,706 INFO  L413           NwaCegarLoop]: 15105 mSDtfsCounter, 57100 mSDsluCounter, 30204 mSDsCounter, 0 mSdLazyCounter, 13937 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57100 SdHoareTripleChecker+Valid, 45309 SdHoareTripleChecker+Invalid, 13938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:49:05,707 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [57100 Valid, 45309 Invalid, 13938 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 13937 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time]
[2023-11-29 04:49:05,761 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23221 states.
[2023-11-29 04:49:06,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23221 to 12187.
[2023-11-29 04:49:06,052 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12187 states, 12186 states have (on average 1.6664204825209257) internal successors, (20307), 12186 states have internal predecessors, (20307), 0 states have call successors, (0), 0 states 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 04:49:06,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12187 states to 12187 states and 20307 transitions.
[2023-11-29 04:49:06,086 INFO  L78                 Accepts]: Start accepts. Automaton has 12187 states and 20307 transitions. Word has length 552
[2023-11-29 04:49:06,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:49:06,088 INFO  L495      AbstractCegarLoop]: Abstraction has 12187 states and 20307 transitions.
[2023-11-29 04:49:06,089 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 110.4) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 04:49:06,089 INFO  L276                IsEmpty]: Start isEmpty. Operand 12187 states and 20307 transitions.
[2023-11-29 04:49:06,098 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 554
[2023-11-29 04:49:06,099 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:49:06,099 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]
[2023-11-29 04:49:06,099 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-29 04:49:06,099 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:49:06,100 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:49:06,100 INFO  L85        PathProgramCache]: Analyzing trace with hash -1362687105, now seen corresponding path program 1 times
[2023-11-29 04:49:06,100 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:49:06,100 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701055742]
[2023-11-29 04:49:06,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:06,101 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:49:06,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:49:07,331 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 04:49:07,332 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:49:07,332 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701055742]
[2023-11-29 04:49:07,332 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701055742] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:49:07,332 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:49:07,332 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:49:07,333 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615287319]
[2023-11-29 04:49:07,333 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:49:07,335 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:49:07,335 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:49:07,336 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:49:07,337 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:49:07,337 INFO  L87              Difference]: Start difference. First operand 12187 states and 20307 transitions. Second operand  has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 04:49:07,652 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:49:07,653 INFO  L93              Difference]: Finished difference Result 12191 states and 20311 transitions.
[2023-11-29 04:49:07,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:49:07,653 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 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 553
[2023-11-29 04:49:07,655 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:49:07,668 INFO  L225             Difference]: With dead ends: 12191
[2023-11-29 04:49:07,669 INFO  L226             Difference]: Without dead ends: 12189
[2023-11-29 04:49:07,672 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 04:49:07,674 INFO  L413           NwaCegarLoop]: 19746 mSDtfsCounter, 1 mSDsluCounter, 39487 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59233 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 04:49:07,674 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59233 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:49:07,693 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12189 states.
[2023-11-29 04:49:07,833 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12189 to 12189.
[2023-11-29 04:49:07,850 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12189 states, 12188 states have (on average 1.6663111256974072) internal successors, (20309), 12188 states have internal predecessors, (20309), 0 states have call successors, (0), 0 states 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 04:49:07,876 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12189 states to 12189 states and 20309 transitions.
[2023-11-29 04:49:07,877 INFO  L78                 Accepts]: Start accepts. Automaton has 12189 states and 20309 transitions. Word has length 553
[2023-11-29 04:49:07,878 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:49:07,878 INFO  L495      AbstractCegarLoop]: Abstraction has 12189 states and 20309 transitions.
[2023-11-29 04:49:07,878 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 04:49:07,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 12189 states and 20309 transitions.
[2023-11-29 04:49:07,887 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 555
[2023-11-29 04:49:07,887 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:49:07,888 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]
[2023-11-29 04:49:07,888 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-29 04:49:07,888 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:49:07,889 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:49:07,889 INFO  L85        PathProgramCache]: Analyzing trace with hash 708160523, now seen corresponding path program 1 times
[2023-11-29 04:49:07,889 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:49:07,890 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617590871]
[2023-11-29 04:49:07,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:07,890 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:49:08,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:49:08,602 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 04:49:08,603 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:49:08,603 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617590871]
[2023-11-29 04:49:08,603 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617590871] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:49:08,603 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:49:08,604 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:49:08,604 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404032398]
[2023-11-29 04:49:08,604 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:49:08,605 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-29 04:49:08,605 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:49:08,606 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-29 04:49:08,606 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-29 04:49:08,607 INFO  L87              Difference]: Start difference. First operand 12189 states and 20309 transitions. Second operand  has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 04:49:08,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:49:08,983 INFO  L93              Difference]: Finished difference Result 23564 states and 39263 transitions.
[2023-11-29 04:49:08,983 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-29 04:49:08,984 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 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 554
[2023-11-29 04:49:08,985 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:49:09,000 INFO  L225             Difference]: With dead ends: 23564
[2023-11-29 04:49:09,000 INFO  L226             Difference]: Without dead ends: 12192
[2023-11-29 04:49:09,010 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 04:49:09,012 INFO  L413           NwaCegarLoop]: 19746 mSDtfsCounter, 1 mSDsluCounter, 39485 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59231 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:49:09,012 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59231 Invalid, 15 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:49:09,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12192 states.
[2023-11-29 04:49:09,146 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12192 to 12191.
[2023-11-29 04:49:09,162 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12191 states, 12190 states have (on average 1.6662018047579983) internal successors, (20311), 12190 states have internal predecessors, (20311), 0 states have call successors, (0), 0 states 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 04:49:09,183 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12191 states to 12191 states and 20311 transitions.
[2023-11-29 04:49:09,183 INFO  L78                 Accepts]: Start accepts. Automaton has 12191 states and 20311 transitions. Word has length 554
[2023-11-29 04:49:09,184 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:49:09,185 INFO  L495      AbstractCegarLoop]: Abstraction has 12191 states and 20311 transitions.
[2023-11-29 04:49:09,185 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 04:49:09,185 INFO  L276                IsEmpty]: Start isEmpty. Operand 12191 states and 20311 transitions.
[2023-11-29 04:49:09,194 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 556
[2023-11-29 04:49:09,194 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:49:09,195 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]
[2023-11-29 04:49:09,195 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-29 04:49:09,195 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:49:09,196 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:49:09,196 INFO  L85        PathProgramCache]: Analyzing trace with hash 265923095, now seen corresponding path program 1 times
[2023-11-29 04:49:09,196 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:49:09,196 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494102794]
[2023-11-29 04:49:09,197 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:09,197 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:49:09,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:49:10,006 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 04:49:10,006 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:49:10,007 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494102794]
[2023-11-29 04:49:10,007 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494102794] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:49:10,007 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:49:10,007 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-29 04:49:10,007 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962958520]
[2023-11-29 04:49:10,007 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:49:10,008 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:49:10,008 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:49:10,009 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:49:10,009 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 04:49:10,010 INFO  L87              Difference]: Start difference. First operand 12191 states and 20311 transitions. Second operand  has 5 states, 5 states have (on average 111.0) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 04:49:10,763 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:49:10,763 INFO  L93              Difference]: Finished difference Result 34929 states and 58200 transitions.
[2023-11-29 04:49:10,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:49:10,764 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 111.0) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 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 555
[2023-11-29 04:49:10,765 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:49:10,807 INFO  L225             Difference]: With dead ends: 34929
[2023-11-29 04:49:10,807 INFO  L226             Difference]: Without dead ends: 23555
[2023-11-29 04:49:10,827 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 04:49:10,828 INFO  L413           NwaCegarLoop]: 20298 mSDtfsCounter, 76572 mSDsluCounter, 39483 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76572 SdHoareTripleChecker+Valid, 59781 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:49:10,828 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [76572 Valid, 59781 Invalid, 21 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:49:10,858 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23555 states.
[2023-11-29 04:49:11,074 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23555 to 12193.
[2023-11-29 04:49:11,100 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12193 states, 12192 states have (on average 1.6660925196850394) internal successors, (20313), 12192 states have internal predecessors, (20313), 0 states have call successors, (0), 0 states 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 04:49:11,125 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12193 states to 12193 states and 20313 transitions.
[2023-11-29 04:49:11,126 INFO  L78                 Accepts]: Start accepts. Automaton has 12193 states and 20313 transitions. Word has length 555
[2023-11-29 04:49:11,127 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:49:11,127 INFO  L495      AbstractCegarLoop]: Abstraction has 12193 states and 20313 transitions.
[2023-11-29 04:49:11,127 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 111.0) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 04:49:11,127 INFO  L276                IsEmpty]: Start isEmpty. Operand 12193 states and 20313 transitions.
[2023-11-29 04:49:11,548 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8131
[2023-11-29 04:49:11,548 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:49:11,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:49:11,552 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-29 04:49:11,553 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:49:11,553 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:49:11,556 INFO  L85        PathProgramCache]: Analyzing trace with hash -1977643018, now seen corresponding path program 1 times
[2023-11-29 04:49:11,556 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:49:11,556 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010248102]
[2023-11-29 04:49:11,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:11,557 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:49:12,478 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:49:12,478 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264275570]
[2023-11-29 04:49:12,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:12,480 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:49:12,480 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:49:12,482 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:49:12,485 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-29 04:49:21,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:49:22,196 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36626 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-29 04:49:22,366 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:49:22,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:49:22,667 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:49:22,668 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:49:22,668 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010248102]
[2023-11-29 04:49:22,668 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:49:22,668 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264275570]
[2023-11-29 04:49:22,668 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264275570] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:49:22,668 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:49:22,671 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-29 04:49:22,671 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149920346]
[2023-11-29 04:49:22,671 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:49:22,682 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-29 04:49:22,682 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:49:22,693 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-29 04:49:22,694 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-29 04:49:22,697 INFO  L87              Difference]: Start difference. First operand 12193 states and 20313 transitions. Second operand  has 3 states, 3 states have (on average 2710.0) internal successors, (8130), 3 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states 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 04:49:22,969 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:49:22,969 INFO  L93              Difference]: Finished difference Result 23572 states and 39273 transitions.
[2023-11-29 04:49:22,969 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-29 04:49:22,971 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2710.0) internal successors, (8130), 3 states have internal predecessors, (8130), 0 states have call successors, (0), 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 8130
[2023-11-29 04:49:22,976 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:49:23,012 INFO  L225             Difference]: With dead ends: 23572
[2023-11-29 04:49:23,012 INFO  L226             Difference]: Without dead ends: 12198
[2023-11-29 04:49:23,030 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8129 GetRequests, 8128 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-29 04:49:23,031 INFO  L413           NwaCegarLoop]: 19747 mSDtfsCounter, 6 mSDsluCounter, 19742 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39489 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:49:23,032 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39489 Invalid, 8 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:49:23,054 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12198 states.
[2023-11-29 04:49:23,394 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12198 to 12194.
[2023-11-29 04:49:23,404 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12194 states, 12193 states have (on average 1.6660378905929631) internal successors, (20314), 12193 states have internal predecessors, (20314), 0 states have call successors, (0), 0 states 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 04:49:23,420 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12194 states to 12194 states and 20314 transitions.
[2023-11-29 04:49:23,420 INFO  L78                 Accepts]: Start accepts. Automaton has 12194 states and 20314 transitions. Word has length 8130
[2023-11-29 04:49:23,424 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:49:23,424 INFO  L495      AbstractCegarLoop]: Abstraction has 12194 states and 20314 transitions.
[2023-11-29 04:49:23,426 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2710.0) internal successors, (8130), 3 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states 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 04:49:23,426 INFO  L276                IsEmpty]: Start isEmpty. Operand 12194 states and 20314 transitions.
[2023-11-29 04:49:23,677 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8131
[2023-11-29 04:49:23,677 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:49:23,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:49:23,776 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-29 04:49:23,882 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:49:23,883 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:49:23,885 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:49:23,890 INFO  L85        PathProgramCache]: Analyzing trace with hash -1253421848, now seen corresponding path program 1 times
[2023-11-29 04:49:23,890 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:49:23,890 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466277830]
[2023-11-29 04:49:23,891 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:23,891 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:49:25,047 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:49:25,048 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679404033]
[2023-11-29 04:49:25,050 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:49:25,050 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:49:25,050 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:49:25,051 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:49:25,054 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-29 04:49:33,771 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:49:34,005 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36627 conjuncts, 7 conjunts are in the unsatisfiable core
[2023-11-29 04:49:34,126 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:50:31,839 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:50:31,839 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:50:31,839 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:50:31,840 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466277830]
[2023-11-29 04:50:31,840 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:50:31,840 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679404033]
[2023-11-29 04:50:31,840 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [679404033] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:50:31,840 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:50:31,843 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-29 04:50:31,843 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738260509]
[2023-11-29 04:50:31,843 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:50:31,852 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:50:31,852 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:50:31,861 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:50:31,862 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-29 04:50:31,864 INFO  L87              Difference]: Start difference. First operand 12194 states and 20314 transitions. Second operand  has 5 states, 5 states have (on average 1626.0) internal successors, (8130), 5 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states 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 04:50:46,195 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:50:46,195 INFO  L93              Difference]: Finished difference Result 34608 states and 57660 transitions.
[2023-11-29 04:50:46,196 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:50:46,198 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1626.0) internal successors, (8130), 5 states have internal predecessors, (8130), 0 states have call successors, (0), 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 8130
[2023-11-29 04:50:46,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:50:46,244 INFO  L225             Difference]: With dead ends: 34608
[2023-11-29 04:50:46,244 INFO  L226             Difference]: Without dead ends: 23233
[2023-11-29 04:50:46,262 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8131 GetRequests, 8126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2023-11-29 04:50:46,263 INFO  L413           NwaCegarLoop]: 16036 mSDtfsCounter, 11050 mSDsluCounter, 46236 mSDsCounter, 0 mSdLazyCounter, 16740 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11050 SdHoareTripleChecker+Valid, 62272 SdHoareTripleChecker+Invalid, 16740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time
[2023-11-29 04:50:46,263 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [11050 Valid, 62272 Invalid, 16740 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 16740 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time]
[2023-11-29 04:50:46,299 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23233 states.
[2023-11-29 04:50:46,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23233 to 23223.
[2023-11-29 04:50:46,756 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23223 states, 23222 states have (on average 1.6661786237188874) internal successors, (38692), 23222 states have internal predecessors, (38692), 0 states have call successors, (0), 0 states 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 04:50:46,809 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23223 states to 23223 states and 38692 transitions.
[2023-11-29 04:50:46,810 INFO  L78                 Accepts]: Start accepts. Automaton has 23223 states and 38692 transitions. Word has length 8130
[2023-11-29 04:50:46,817 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:50:46,817 INFO  L495      AbstractCegarLoop]: Abstraction has 23223 states and 38692 transitions.
[2023-11-29 04:50:46,820 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1626.0) internal successors, (8130), 5 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states 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 04:50:46,820 INFO  L276                IsEmpty]: Start isEmpty. Operand 23223 states and 38692 transitions.
[2023-11-29 04:50:47,423 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8132
[2023-11-29 04:50:47,424 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:50:47,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:50:47,524 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-29 04:50:47,629 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:50:47,629 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:50:47,629 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:50:47,632 INFO  L85        PathProgramCache]: Analyzing trace with hash 506705764, now seen corresponding path program 1 times
[2023-11-29 04:50:47,632 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:50:47,633 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41293732]
[2023-11-29 04:50:47,633 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:50:47,634 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:50:48,682 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:50:48,683 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100995143]
[2023-11-29 04:50:48,684 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:50:48,685 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:50:48,685 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:50:48,686 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:50:48,688 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-29 04:50:58,490 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:50:58,714 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36630 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-11-29 04:50:58,836 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:50:59,440 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2023-11-29 04:50:59,440 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-29 04:50:59,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2023-11-29 04:50:59,600 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:50:59,600 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41293732]
[2023-11-29 04:50:59,601 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:50:59,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100995143]
[2023-11-29 04:50:59,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [100995143] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-29 04:50:59,601 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-29 04:50:59,605 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12
[2023-11-29 04:50:59,605 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807902918]
[2023-11-29 04:50:59,605 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:50:59,612 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-29 04:50:59,612 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:50:59,621 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-29 04:50:59,621 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2023-11-29 04:50:59,624 INFO  L87              Difference]: Start difference. First operand 23223 states and 38692 transitions. Second operand  has 5 states, 5 states have (on average 1581.6) internal successors, (7908), 5 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states 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 04:51:00,532 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:51:00,532 INFO  L93              Difference]: Finished difference Result 57331 states and 95523 transitions.
[2023-11-29 04:51:00,532 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-29 04:51:00,534 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1581.6) internal successors, (7908), 5 states have internal predecessors, (7908), 0 states have call successors, (0), 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 8131
[2023-11-29 04:51:00,540 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:51:00,561 INFO  L225             Difference]: With dead ends: 57331
[2023-11-29 04:51:00,561 INFO  L226             Difference]: Without dead ends: 34927
[2023-11-29 04:51:00,576 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 16260 GetRequests, 16250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2023-11-29 04:51:00,577 INFO  L413           NwaCegarLoop]: 57619 mSDtfsCounter, 37871 mSDsluCounter, 134959 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37871 SdHoareTripleChecker+Valid, 192578 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:51:00,577 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37871 Valid, 192578 Invalid, 38 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-29 04:51:00,616 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34927 states.
[2023-11-29 04:51:00,912 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34927 to 23217.
[2023-11-29 04:51:00,932 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23217 states, 23216 states have (on average 1.6661354238456236) internal successors, (38681), 23216 states have internal predecessors, (38681), 0 states have call successors, (0), 0 states 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 04:51:00,958 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23217 states to 23217 states and 38681 transitions.
[2023-11-29 04:51:00,958 INFO  L78                 Accepts]: Start accepts. Automaton has 23217 states and 38681 transitions. Word has length 8131
[2023-11-29 04:51:00,963 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:51:00,964 INFO  L495      AbstractCegarLoop]: Abstraction has 23217 states and 38681 transitions.
[2023-11-29 04:51:00,965 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1581.6) internal successors, (7908), 5 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states 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 04:51:00,965 INFO  L276                IsEmpty]: Start isEmpty. Operand 23217 states and 38681 transitions.
[2023-11-29 04:51:01,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8133
[2023-11-29 04:51:01,213 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:51:01,217 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:51:01,316 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-29 04:51:01,418 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:51:01,418 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:51:01,418 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:51:01,421 INFO  L85        PathProgramCache]: Analyzing trace with hash 126132100, now seen corresponding path program 1 times
[2023-11-29 04:51:01,421 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:51:01,421 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346327183]
[2023-11-29 04:51:01,422 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:51:01,422 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:51:02,209 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:51:02,209 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568611112]
[2023-11-29 04:51:02,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:51:02,211 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:51:02,211 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:51:02,212 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:51:02,214 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-29 04:51:11,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:51:12,178 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36633 conjuncts, 31 conjunts are in the unsatisfiable core
[2023-11-29 04:51:12,339 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:51:44,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:51:44,159 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:51:44,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:51:44,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346327183]
[2023-11-29 04:51:44,159 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:51:44,159 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568611112]
[2023-11-29 04:51:44,159 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [568611112] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:51:44,160 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:51:44,162 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:51:44,162 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051087106]
[2023-11-29 04:51:44,162 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:51:44,168 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 04:51:44,168 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:51:44,173 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 04:51:44,174 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2023-11-29 04:51:44,176 INFO  L87              Difference]: Start difference. First operand 23217 states and 38681 transitions. Second operand  has 7 states, 7 states have (on average 1161.7142857142858) internal successors, (8132), 6 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 04:51:57,763 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:51:57,763 INFO  L93              Difference]: Finished difference Result 56866 states and 94711 transitions.
[2023-11-29 04:51:57,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-29 04:51:57,765 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1161.7142857142858) internal successors, (8132), 6 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 8132
[2023-11-29 04:51:57,768 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:51:57,790 INFO  L225             Difference]: With dead ends: 56866
[2023-11-29 04:51:57,790 INFO  L226             Difference]: Without dead ends: 34468
[2023-11-29 04:51:57,809 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8134 GetRequests, 8126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:51:57,810 INFO  L413           NwaCegarLoop]: 15889 mSDtfsCounter, 54634 mSDsluCounter, 65033 mSDsCounter, 0 mSdLazyCounter, 18486 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54634 SdHoareTripleChecker+Valid, 80922 SdHoareTripleChecker+Invalid, 18597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 18486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time
[2023-11-29 04:51:57,810 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [54634 Valid, 80922 Invalid, 18597 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [111 Valid, 18486 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time]
[2023-11-29 04:51:57,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34468 states.
[2023-11-29 04:51:58,075 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34468 to 28643.
[2023-11-29 04:51:58,099 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28643 states, 28642 states have (on average 1.6661196843795825) internal successors, (47721), 28642 states have internal predecessors, (47721), 0 states have call successors, (0), 0 states 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 04:51:58,135 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28643 states to 28643 states and 47721 transitions.
[2023-11-29 04:51:58,135 INFO  L78                 Accepts]: Start accepts. Automaton has 28643 states and 47721 transitions. Word has length 8132
[2023-11-29 04:51:58,139 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:51:58,139 INFO  L495      AbstractCegarLoop]: Abstraction has 28643 states and 47721 transitions.
[2023-11-29 04:51:58,140 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1161.7142857142858) internal successors, (8132), 6 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 04:51:58,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 28643 states and 47721 transitions.
[2023-11-29 04:51:58,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8134
[2023-11-29 04:51:58,388 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:51:58,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:51:58,512 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-29 04:51:58,593 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-29 04:51:58,594 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:51:58,594 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:51:58,597 INFO  L85        PathProgramCache]: Analyzing trace with hash -388402326, now seen corresponding path program 1 times
[2023-11-29 04:51:58,597 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:51:58,597 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203797051]
[2023-11-29 04:51:58,597 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:51:58,598 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:51:59,406 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:51:59,407 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647769119]
[2023-11-29 04:51:59,408 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:51:59,408 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:51:59,409 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:51:59,410 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:51:59,412 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-29 04:52:08,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:52:08,325 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36636 conjuncts, 7 conjunts are in the unsatisfiable core
[2023-11-29 04:52:08,428 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:52:15,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:52:15,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:52:15,691 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:52:15,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203797051]
[2023-11-29 04:52:15,691 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:52:15,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647769119]
[2023-11-29 04:52:15,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [647769119] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:52:15,691 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:52:15,693 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:52:15,694 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537956647]
[2023-11-29 04:52:15,694 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:52:15,699 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 04:52:15,699 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:52:15,705 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 04:52:15,705 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-11-29 04:52:15,707 INFO  L87              Difference]: Start difference. First operand 28643 states and 47721 transitions. Second operand  has 6 states, 6 states have (on average 1355.5) internal successors, (8133), 6 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states 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 04:52:29,414 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:52:29,414 INFO  L93              Difference]: Finished difference Result 72899 states and 121467 transitions.
[2023-11-29 04:52:29,414 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 04:52:29,416 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1355.5) internal successors, (8133), 6 states have internal predecessors, (8133), 0 states have call successors, (0), 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 8133
[2023-11-29 04:52:29,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:52:29,450 INFO  L225             Difference]: With dead ends: 72899
[2023-11-29 04:52:29,450 INFO  L226             Difference]: Without dead ends: 46947
[2023-11-29 04:52:29,468 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8135 GetRequests, 8128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2023-11-29 04:52:29,469 INFO  L413           NwaCegarLoop]: 23466 mSDtfsCounter, 37314 mSDsluCounter, 61965 mSDsCounter, 0 mSdLazyCounter, 21565 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37314 SdHoareTripleChecker+Valid, 85431 SdHoareTripleChecker+Invalid, 21566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time
[2023-11-29 04:52:29,469 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37314 Valid, 85431 Invalid, 21566 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 21565 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time]
[2023-11-29 04:52:29,506 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46947 states.
[2023-11-29 04:52:29,780 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46947 to 35751.
[2023-11-29 04:52:29,808 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35751 states, 35750 states have (on average 1.6661258741258742) internal successors, (59564), 35750 states have internal predecessors, (59564), 0 states have call successors, (0), 0 states 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 04:52:29,851 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35751 states to 35751 states and 59564 transitions.
[2023-11-29 04:52:29,852 INFO  L78                 Accepts]: Start accepts. Automaton has 35751 states and 59564 transitions. Word has length 8133
[2023-11-29 04:52:29,853 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:52:29,853 INFO  L495      AbstractCegarLoop]: Abstraction has 35751 states and 59564 transitions.
[2023-11-29 04:52:29,855 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1355.5) internal successors, (8133), 6 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states 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 04:52:29,855 INFO  L276                IsEmpty]: Start isEmpty. Operand 35751 states and 59564 transitions.
[2023-11-29 04:52:30,267 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8135
[2023-11-29 04:52:30,267 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:52:30,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:52:30,368 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-29 04:52:30,471 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:52:30,471 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:52:30,472 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:52:30,475 INFO  L85        PathProgramCache]: Analyzing trace with hash -961258326, now seen corresponding path program 1 times
[2023-11-29 04:52:30,475 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:52:30,476 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830962701]
[2023-11-29 04:52:30,476 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:52:30,476 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:52:31,208 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:52:31,208 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060388280]
[2023-11-29 04:52:31,210 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:52:31,210 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:52:31,210 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:52:31,211 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:52:31,212 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-29 04:52:39,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:52:40,164 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36639 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-29 04:52:40,264 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:52:56,482 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:52:56,482 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:52:56,483 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:52:56,483 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830962701]
[2023-11-29 04:52:56,483 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:52:56,483 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060388280]
[2023-11-29 04:52:56,483 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060388280] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:52:56,483 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:52:56,486 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 04:52:56,486 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462684944]
[2023-11-29 04:52:56,486 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:52:56,491 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 04:52:56,492 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:52:56,497 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 04:52:56,497 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:52:56,499 INFO  L87              Difference]: Start difference. First operand 35751 states and 59564 transitions. Second operand  has 8 states, 8 states have (on average 1016.75) internal successors, (8134), 8 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 04:53:15,971 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:53:15,971 INFO  L93              Difference]: Finished difference Result 87117 states and 145158 transitions.
[2023-11-29 04:53:15,972 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:53:15,973 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1016.75) internal successors, (8134), 8 states have internal predecessors, (8134), 0 states have call successors, (0), 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 8134
[2023-11-29 04:53:15,976 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:53:16,017 INFO  L225             Difference]: With dead ends: 87117
[2023-11-29 04:53:16,017 INFO  L226             Difference]: Without dead ends: 57611
[2023-11-29 04:53:16,038 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8135 GetRequests, 8127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:53:16,039 INFO  L413           NwaCegarLoop]: 23444 mSDtfsCounter, 34948 mSDsluCounter, 85332 mSDsCounter, 0 mSdLazyCounter, 27190 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34948 SdHoareTripleChecker+Valid, 108776 SdHoareTripleChecker+Invalid, 27194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time
[2023-11-29 04:53:16,039 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34948 Valid, 108776 Invalid, 27194 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4 Valid, 27190 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time]
[2023-11-29 04:53:16,084 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57611 states.
[2023-11-29 04:53:16,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57611 to 42897.
[2023-11-29 04:53:16,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42897 states, 42896 states have (on average 1.666029466616934) internal successors, (71466), 42896 states have internal predecessors, (71466), 0 states have call successors, (0), 0 states 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 04:53:16,497 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42897 states to 42897 states and 71466 transitions.
[2023-11-29 04:53:16,497 INFO  L78                 Accepts]: Start accepts. Automaton has 42897 states and 71466 transitions. Word has length 8134
[2023-11-29 04:53:16,500 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:53:16,500 INFO  L495      AbstractCegarLoop]: Abstraction has 42897 states and 71466 transitions.
[2023-11-29 04:53:16,501 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1016.75) internal successors, (8134), 8 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 04:53:16,501 INFO  L276                IsEmpty]: Start isEmpty. Operand 42897 states and 71466 transitions.
[2023-11-29 04:53:16,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8135
[2023-11-29 04:53:16,823 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:53:16,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:53:16,921 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-29 04:53:17,027 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-29 04:53:17,027 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:53:17,028 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:53:17,031 INFO  L85        PathProgramCache]: Analyzing trace with hash 1011432936, now seen corresponding path program 1 times
[2023-11-29 04:53:17,031 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:53:17,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44598728]
[2023-11-29 04:53:17,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:53:17,032 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:53:17,754 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:53:17,754 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370657704]
[2023-11-29 04:53:17,755 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:53:17,756 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:53:17,756 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:53:17,756 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:53:17,757 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-29 04:53:26,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:53:26,953 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36640 conjuncts, 13 conjunts are in the unsatisfiable core
[2023-11-29 04:53:27,271 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:53:33,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:53:33,903 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:53:33,904 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:53:33,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44598728]
[2023-11-29 04:53:33,904 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:53:33,904 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370657704]
[2023-11-29 04:53:33,904 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [370657704] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:53:33,904 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:53:33,907 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:53:33,907 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391463134]
[2023-11-29 04:53:33,907 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:53:33,914 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 04:53:33,914 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:53:33,920 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 04:53:33,920 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-29 04:53:33,922 INFO  L87              Difference]: Start difference. First operand 42897 states and 71466 transitions. Second operand  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 04:53:47,415 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:53:47,415 INFO  L93              Difference]: Finished difference Result 90745 states and 151190 transitions.
[2023-11-29 04:53:47,415 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 04:53:47,417 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 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 8134
[2023-11-29 04:53:47,420 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:53:47,459 INFO  L225             Difference]: With dead ends: 90745
[2023-11-29 04:53:47,459 INFO  L226             Difference]: Without dead ends: 54093
[2023-11-29 04:53:47,480 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8135 GetRequests, 8129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:53:47,481 INFO  L413           NwaCegarLoop]: 23445 mSDtfsCounter, 25471 mSDsluCounter, 61923 mSDsCounter, 0 mSdLazyCounter, 21541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25471 SdHoareTripleChecker+Valid, 85368 SdHoareTripleChecker+Invalid, 21543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time
[2023-11-29 04:53:47,481 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25471 Valid, 85368 Invalid, 21543 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 21541 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time]
[2023-11-29 04:53:47,523 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54093 states.
[2023-11-29 04:53:47,839 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54093 to 42897.
[2023-11-29 04:53:47,871 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42897 states, 42896 states have (on average 1.666029466616934) internal successors, (71466), 42896 states have internal predecessors, (71466), 0 states have call successors, (0), 0 states 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 04:53:47,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42897 states to 42897 states and 71466 transitions.
[2023-11-29 04:53:47,923 INFO  L78                 Accepts]: Start accepts. Automaton has 42897 states and 71466 transitions. Word has length 8134
[2023-11-29 04:53:47,925 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:53:47,925 INFO  L495      AbstractCegarLoop]: Abstraction has 42897 states and 71466 transitions.
[2023-11-29 04:53:47,926 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 04:53:47,927 INFO  L276                IsEmpty]: Start isEmpty. Operand 42897 states and 71466 transitions.
[2023-11-29 04:53:48,247 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8135
[2023-11-29 04:53:48,247 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:53:48,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:53:48,345 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-29 04:53:48,450 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2023-11-29 04:53:48,451 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:53:48,452 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:53:48,454 INFO  L85        PathProgramCache]: Analyzing trace with hash -1350605462, now seen corresponding path program 1 times
[2023-11-29 04:53:48,454 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:53:48,454 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655197945]
[2023-11-29 04:53:48,454 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:53:48,455 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:53:49,182 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:53:49,183 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608497245]
[2023-11-29 04:53:49,184 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:53:49,184 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:53:49,184 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:53:49,185 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:53:49,186 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-29 04:53:57,597 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:53:57,832 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36641 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-29 04:53:57,930 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:54:02,655 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:54:02,656 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:54:02,656 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:54:02,656 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655197945]
[2023-11-29 04:54:02,656 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:54:02,656 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608497245]
[2023-11-29 04:54:02,656 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [608497245] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:54:02,656 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:54:02,659 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:54:02,659 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897687117]
[2023-11-29 04:54:02,659 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:54:02,665 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 04:54:02,666 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:54:02,673 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 04:54:02,673 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-29 04:54:02,675 INFO  L87              Difference]: Start difference. First operand 42897 states and 71466 transitions. Second operand  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 04:54:14,808 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:54:14,808 INFO  L93              Difference]: Finished difference Result 90745 states and 151190 transitions.
[2023-11-29 04:54:14,808 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 04:54:14,810 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 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 8134
[2023-11-29 04:54:14,812 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:54:14,850 INFO  L225             Difference]: With dead ends: 90745
[2023-11-29 04:54:14,850 INFO  L226             Difference]: Without dead ends: 54093
[2023-11-29 04:54:14,869 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8135 GetRequests, 8129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:54:14,869 INFO  L413           NwaCegarLoop]: 15083 mSDtfsCounter, 34781 mSDsluCounter, 45229 mSDsCounter, 0 mSdLazyCounter, 18679 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34781 SdHoareTripleChecker+Valid, 60312 SdHoareTripleChecker+Invalid, 18680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time
[2023-11-29 04:54:14,870 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34781 Valid, 60312 Invalid, 18680 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 18679 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time]
[2023-11-29 04:54:14,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54093 states.
[2023-11-29 04:54:15,219 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54093 to 42931.
[2023-11-29 04:54:15,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42931 states, 42930 states have (on average 1.6659678546471) internal successors, (71520), 42930 states have internal predecessors, (71520), 0 states have call successors, (0), 0 states 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 04:54:15,300 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42931 states to 42931 states and 71520 transitions.
[2023-11-29 04:54:15,300 INFO  L78                 Accepts]: Start accepts. Automaton has 42931 states and 71520 transitions. Word has length 8134
[2023-11-29 04:54:15,302 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:54:15,303 INFO  L495      AbstractCegarLoop]: Abstraction has 42931 states and 71520 transitions.
[2023-11-29 04:54:15,304 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1355.6666666666667) internal successors, (8134), 6 states have internal predecessors, (8134), 0 states have call successors, (0), 0 states 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 04:54:15,304 INFO  L276                IsEmpty]: Start isEmpty. Operand 42931 states and 71520 transitions.
[2023-11-29 04:54:15,550 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8136
[2023-11-29 04:54:15,550 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:54:15,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:54:15,648 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-11-29 04:54:15,752 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-29 04:54:15,753 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:54:15,753 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:54:15,754 INFO  L85        PathProgramCache]: Analyzing trace with hash -1379034392, now seen corresponding path program 1 times
[2023-11-29 04:54:15,754 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:54:15,755 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051040916]
[2023-11-29 04:54:15,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:54:15,756 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:54:16,577 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:54:16,577 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683401713]
[2023-11-29 04:54:16,578 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:54:16,578 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:54:16,578 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:54:16,579 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:54:16,580 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-29 04:54:25,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:54:25,551 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36642 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-29 04:54:25,640 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:54:41,715 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:54:41,716 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:54:41,716 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:54:41,716 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051040916]
[2023-11-29 04:54:41,716 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:54:41,716 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683401713]
[2023-11-29 04:54:41,716 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683401713] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:54:41,716 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:54:41,718 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 04:54:41,718 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861126258]
[2023-11-29 04:54:41,718 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:54:41,722 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 04:54:41,722 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:54:41,727 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 04:54:41,727 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:54:41,729 INFO  L87              Difference]: Start difference. First operand 42931 states and 71520 transitions. Second operand  has 8 states, 8 states have (on average 1016.875) internal successors, (8135), 8 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 04:54:58,708 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:54:58,708 INFO  L93              Difference]: Finished difference Result 90813 states and 151294 transitions.
[2023-11-29 04:54:58,708 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:54:58,710 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1016.875) internal successors, (8135), 8 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 8135
[2023-11-29 04:54:58,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:54:58,747 INFO  L225             Difference]: With dead ends: 90813
[2023-11-29 04:54:58,747 INFO  L226             Difference]: Without dead ends: 54127
[2023-11-29 04:54:58,766 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8136 GetRequests, 8128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:54:58,767 INFO  L413           NwaCegarLoop]: 23422 mSDtfsCounter, 34952 mSDsluCounter, 74552 mSDsCounter, 0 mSdLazyCounter, 24099 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34952 SdHoareTripleChecker+Valid, 97974 SdHoareTripleChecker+Invalid, 24101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time
[2023-11-29 04:54:58,767 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34952 Valid, 97974 Invalid, 24101 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2 Valid, 24099 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time]
[2023-11-29 04:54:58,808 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54127 states.
[2023-11-29 04:54:59,116 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54127 to 43003.
[2023-11-29 04:54:59,149 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43003 states, 43002 states have (on average 1.6657829868378216) internal successors, (71632), 43002 states have internal predecessors, (71632), 0 states have call successors, (0), 0 states 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 04:54:59,200 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43003 states to 43003 states and 71632 transitions.
[2023-11-29 04:54:59,200 INFO  L78                 Accepts]: Start accepts. Automaton has 43003 states and 71632 transitions. Word has length 8135
[2023-11-29 04:54:59,203 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:54:59,203 INFO  L495      AbstractCegarLoop]: Abstraction has 43003 states and 71632 transitions.
[2023-11-29 04:54:59,204 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1016.875) internal successors, (8135), 8 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 04:54:59,204 INFO  L276                IsEmpty]: Start isEmpty. Operand 43003 states and 71632 transitions.
[2023-11-29 04:54:59,449 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8136
[2023-11-29 04:54:59,449 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:54:59,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 04:54:59,547 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-29 04:54:59,651 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:54:59,652 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:54:59,652 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:54:59,653 INFO  L85        PathProgramCache]: Analyzing trace with hash -355147414, now seen corresponding path program 1 times
[2023-11-29 04:54:59,653 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:54:59,654 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684802925]
[2023-11-29 04:54:59,654 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:54:59,654 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:55:00,365 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:55:00,365 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509344282]
[2023-11-29 04:55:00,367 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:55:00,367 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:55:00,367 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:55:00,368 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:55:00,369 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-29 04:55:09,219 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:55:09,453 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36643 conjuncts, 13 conjunts are in the unsatisfiable core
[2023-11-29 04:55:09,541 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:55:16,120 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:55:16,120 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:55:16,120 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:55:16,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684802925]
[2023-11-29 04:55:16,120 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:55:16,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509344282]
[2023-11-29 04:55:16,120 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509344282] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:55:16,120 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:55:16,123 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 04:55:16,123 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109727359]
[2023-11-29 04:55:16,123 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:55:16,127 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 04:55:16,127 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:55:16,132 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 04:55:16,132 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2023-11-29 04:55:16,134 INFO  L87              Difference]: Start difference. First operand 43003 states and 71632 transitions. Second operand  has 7 states, 7 states have (on average 1162.142857142857) internal successors, (8135), 7 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 04:55:35,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:55:35,155 INFO  L93              Difference]: Finished difference Result 102105 states and 170096 transitions.
[2023-11-29 04:55:35,155 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:55:35,157 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1162.142857142857) internal successors, (8135), 7 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 8135
[2023-11-29 04:55:35,160 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:55:35,207 INFO  L225             Difference]: With dead ends: 102105
[2023-11-29 04:55:35,207 INFO  L226             Difference]: Without dead ends: 65347
[2023-11-29 04:55:35,231 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8137 GetRequests, 8129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:55:35,231 INFO  L413           NwaCegarLoop]: 31754 mSDtfsCounter, 34764 mSDsluCounter, 101925 mSDsCounter, 0 mSdLazyCounter, 30061 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34764 SdHoareTripleChecker+Valid, 133679 SdHoareTripleChecker+Invalid, 30065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time
[2023-11-29 04:55:35,231 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34764 Valid, 133679 Invalid, 30065 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4 Valid, 30061 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time]
[2023-11-29 04:55:35,280 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65347 states.
[2023-11-29 04:55:35,887 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65347 to 42967.
[2023-11-29 04:55:35,909 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42967 states, 42966 states have (on average 1.6658753432946982) internal successors, (71576), 42966 states have internal predecessors, (71576), 0 states have call successors, (0), 0 states 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 04:55:35,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42967 states to 42967 states and 71576 transitions.
[2023-11-29 04:55:35,959 INFO  L78                 Accepts]: Start accepts. Automaton has 42967 states and 71576 transitions. Word has length 8135
[2023-11-29 04:55:35,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:55:35,962 INFO  L495      AbstractCegarLoop]: Abstraction has 42967 states and 71576 transitions.
[2023-11-29 04:55:35,963 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1162.142857142857) internal successors, (8135), 7 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 04:55:35,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 42967 states and 71576 transitions.
[2023-11-29 04:55:36,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8136
[2023-11-29 04:55:36,218 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:55:36,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:55:36,316 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-29 04:55:36,420 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-29 04:55:36,420 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:55:36,421 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:55:36,423 INFO  L85        PathProgramCache]: Analyzing trace with hash -66616150, now seen corresponding path program 1 times
[2023-11-29 04:55:36,423 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:55:36,423 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462863472]
[2023-11-29 04:55:36,425 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:55:36,425 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:55:37,152 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:55:37,152 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157103538]
[2023-11-29 04:55:37,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:55:37,153 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:55:37,153 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:55:37,154 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:55:37,155 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-29 04:55:46,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:55:46,414 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36645 conjuncts, 9 conjunts are in the unsatisfiable core
[2023-11-29 04:55:46,500 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:55:51,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:55:51,206 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:55:51,206 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:55:51,206 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462863472]
[2023-11-29 04:55:51,206 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:55:51,206 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157103538]
[2023-11-29 04:55:51,207 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [157103538] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:55:51,207 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:55:51,209 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:55:51,209 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736624235]
[2023-11-29 04:55:51,209 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:55:51,215 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 04:55:51,215 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:55:51,222 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 04:55:51,222 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-29 04:55:51,225 INFO  L87              Difference]: Start difference. First operand 42967 states and 71576 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 04:56:03,273 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:56:03,273 INFO  L93              Difference]: Finished difference Result 90851 states and 151354 transitions.
[2023-11-29 04:56:03,274 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 04:56:03,275 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 8135
[2023-11-29 04:56:03,277 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:56:03,305 INFO  L225             Difference]: With dead ends: 90851
[2023-11-29 04:56:03,305 INFO  L226             Difference]: Without dead ends: 54129
[2023-11-29 04:56:03,315 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8136 GetRequests, 8130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:56:03,315 INFO  L413           NwaCegarLoop]: 15083 mSDtfsCounter, 34755 mSDsluCounter, 45229 mSDsCounter, 0 mSdLazyCounter, 18679 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34755 SdHoareTripleChecker+Valid, 60312 SdHoareTripleChecker+Invalid, 18680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time
[2023-11-29 04:56:03,316 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34755 Valid, 60312 Invalid, 18680 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 18679 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time]
[2023-11-29 04:56:03,350 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54129 states.
[2023-11-29 04:56:03,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54129 to 43003.
[2023-11-29 04:56:03,677 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43003 states, 43002 states have (on average 1.6658294963024975) internal successors, (71634), 43002 states have internal predecessors, (71634), 0 states have call successors, (0), 0 states 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 04:56:03,729 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43003 states to 43003 states and 71634 transitions.
[2023-11-29 04:56:03,729 INFO  L78                 Accepts]: Start accepts. Automaton has 43003 states and 71634 transitions. Word has length 8135
[2023-11-29 04:56:03,731 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:56:03,731 INFO  L495      AbstractCegarLoop]: Abstraction has 43003 states and 71634 transitions.
[2023-11-29 04:56:03,733 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 04:56:03,733 INFO  L276                IsEmpty]: Start isEmpty. Operand 43003 states and 71634 transitions.
[2023-11-29 04:56:04,053 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8137
[2023-11-29 04:56:04,053 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:56:04,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 04:56:04,151 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-29 04:56:04,255 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-29 04:56:04,255 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:56:04,256 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:56:04,257 INFO  L85        PathProgramCache]: Analyzing trace with hash 262019662, now seen corresponding path program 1 times
[2023-11-29 04:56:04,257 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:56:04,257 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363798739]
[2023-11-29 04:56:04,258 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:56:04,258 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:56:04,963 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:56:04,963 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235753157]
[2023-11-29 04:56:04,964 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:56:04,964 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:56:04,964 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:56:04,965 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:56:04,966 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-29 04:56:13,546 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:56:13,780 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36645 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-29 04:56:13,870 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:56:27,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:56:27,724 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:56:27,724 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:56:27,724 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363798739]
[2023-11-29 04:56:27,724 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:56:27,724 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235753157]
[2023-11-29 04:56:27,725 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [235753157] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:56:27,725 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:56:27,727 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 04:56:27,728 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22099367]
[2023-11-29 04:56:27,728 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:56:27,731 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 04:56:27,732 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:56:27,736 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 04:56:27,736 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:56:27,738 INFO  L87              Difference]: Start difference. First operand 43003 states and 71634 transitions. Second operand  has 8 states, 8 states have (on average 1017.0) internal successors, (8136), 8 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 04:56:48,037 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:56:48,037 INFO  L93              Difference]: Finished difference Result 90957 states and 151518 transitions.
[2023-11-29 04:56:48,037 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:56:48,039 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1017.0) internal successors, (8136), 8 states have internal predecessors, (8136), 0 states have call successors, (0), 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 8136
[2023-11-29 04:56:48,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:56:48,076 INFO  L225             Difference]: With dead ends: 90957
[2023-11-29 04:56:48,076 INFO  L226             Difference]: Without dead ends: 54199
[2023-11-29 04:56:48,095 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8137 GetRequests, 8129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:56:48,095 INFO  L413           NwaCegarLoop]: 23400 mSDtfsCounter, 34950 mSDsluCounter, 97877 mSDsCounter, 0 mSdLazyCounter, 29694 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34950 SdHoareTripleChecker+Valid, 121277 SdHoareTripleChecker+Invalid, 29696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time
[2023-11-29 04:56:48,096 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34950 Valid, 121277 Invalid, 29696 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2 Valid, 29694 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time]
[2023-11-29 04:56:48,135 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54199 states.
[2023-11-29 04:56:48,440 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54199 to 43111.
[2023-11-29 04:56:48,473 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43111 states, 43110 states have (on average 1.665553235908142) internal successors, (71802), 43110 states have internal predecessors, (71802), 0 states have call successors, (0), 0 states 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 04:56:48,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43111 states to 43111 states and 71802 transitions.
[2023-11-29 04:56:48,526 INFO  L78                 Accepts]: Start accepts. Automaton has 43111 states and 71802 transitions. Word has length 8136
[2023-11-29 04:56:48,528 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:56:48,529 INFO  L495      AbstractCegarLoop]: Abstraction has 43111 states and 71802 transitions.
[2023-11-29 04:56:48,530 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1017.0) internal successors, (8136), 8 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 04:56:48,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 43111 states and 71802 transitions.
[2023-11-29 04:56:48,891 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8137
[2023-11-29 04:56:48,892 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:56:48,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:56:48,992 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-29 04:56:49,094 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-29 04:56:49,094 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:56:49,094 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:56:49,096 INFO  L85        PathProgramCache]: Analyzing trace with hash 1937744908, now seen corresponding path program 1 times
[2023-11-29 04:56:49,096 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:56:49,096 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067502915]
[2023-11-29 04:56:49,097 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:56:49,097 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:56:49,801 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:56:49,801 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438008257]
[2023-11-29 04:56:49,803 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:56:49,803 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:56:49,803 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:56:49,804 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:56:49,805 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-29 04:56:58,579 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:56:58,807 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36646 conjuncts, 13 conjunts are in the unsatisfiable core
[2023-11-29 04:56:58,895 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:57:05,789 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:57:05,789 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:57:05,789 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:57:05,789 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067502915]
[2023-11-29 04:57:05,789 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:57:05,789 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438008257]
[2023-11-29 04:57:05,789 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [438008257] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:57:05,789 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:57:05,792 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 04:57:05,792 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163619814]
[2023-11-29 04:57:05,792 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:57:05,798 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 04:57:05,798 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:57:05,804 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 04:57:05,804 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2023-11-29 04:57:05,806 INFO  L87              Difference]: Start difference. First operand 43111 states and 71802 transitions. Second operand  has 7 states, 7 states have (on average 1162.2857142857142) internal successors, (8136), 7 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 04:57:22,381 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:57:22,381 INFO  L93              Difference]: Finished difference Result 102321 states and 170428 transitions.
[2023-11-29 04:57:22,382 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:57:22,383 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1162.2857142857142) internal successors, (8136), 7 states have internal predecessors, (8136), 0 states have call successors, (0), 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 8136
[2023-11-29 04:57:22,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:57:22,430 INFO  L225             Difference]: With dead ends: 102321
[2023-11-29 04:57:22,431 INFO  L226             Difference]: Without dead ends: 65455
[2023-11-29 04:57:22,452 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8138 GetRequests, 8130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:57:22,453 INFO  L413           NwaCegarLoop]: 31732 mSDtfsCounter, 34723 mSDsluCounter, 86846 mSDsCounter, 0 mSdLazyCounter, 25364 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34723 SdHoareTripleChecker+Valid, 118578 SdHoareTripleChecker+Invalid, 25368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time
[2023-11-29 04:57:22,453 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34723 Valid, 118578 Invalid, 25368 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4 Valid, 25364 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time]
[2023-11-29 04:57:22,501 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65455 states.
[2023-11-29 04:57:22,876 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65455 to 43039.
[2023-11-29 04:57:22,910 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43039 states, 43038 states have (on average 1.6657372554486733) internal successors, (71690), 43038 states have internal predecessors, (71690), 0 states have call successors, (0), 0 states 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 04:57:22,972 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43039 states to 43039 states and 71690 transitions.
[2023-11-29 04:57:22,972 INFO  L78                 Accepts]: Start accepts. Automaton has 43039 states and 71690 transitions. Word has length 8136
[2023-11-29 04:57:22,974 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:57:22,975 INFO  L495      AbstractCegarLoop]: Abstraction has 43039 states and 71690 transitions.
[2023-11-29 04:57:22,976 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1162.2857142857142) internal successors, (8136), 7 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 04:57:22,976 INFO  L276                IsEmpty]: Start isEmpty. Operand 43039 states and 71690 transitions.
[2023-11-29 04:57:23,368 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8137
[2023-11-29 04:57:23,368 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:57:23,370 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:57:23,465 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2023-11-29 04:57:23,570 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-29 04:57:23,571 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:57:23,571 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:57:23,573 INFO  L85        PathProgramCache]: Analyzing trace with hash -2002687796, now seen corresponding path program 1 times
[2023-11-29 04:57:23,573 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:57:23,573 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640763660]
[2023-11-29 04:57:23,573 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:57:23,574 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:57:24,281 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:57:24,281 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830064290]
[2023-11-29 04:57:24,283 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:57:24,283 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:57:24,283 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:57:24,284 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:57:24,285 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-29 04:57:33,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:57:33,364 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36648 conjuncts, 11 conjunts are in the unsatisfiable core
[2023-11-29 04:57:33,475 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:57:39,819 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:57:39,820 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:57:39,820 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:57:39,820 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640763660]
[2023-11-29 04:57:39,820 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:57:39,820 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830064290]
[2023-11-29 04:57:39,820 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [830064290] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:57:39,820 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:57:39,822 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:57:39,823 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064484015]
[2023-11-29 04:57:39,823 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:57:39,828 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 04:57:39,829 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:57:39,835 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 04:57:39,835 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-29 04:57:39,838 INFO  L87              Difference]: Start difference. First operand 43039 states and 71690 transitions. Second operand  has 6 states, 6 states have (on average 1356.0) internal successors, (8136), 6 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 04:57:51,777 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:57:51,777 INFO  L93              Difference]: Finished difference Result 90957 states and 151518 transitions.
[2023-11-29 04:57:51,777 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 04:57:51,779 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1356.0) internal successors, (8136), 6 states have internal predecessors, (8136), 0 states have call successors, (0), 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 8136
[2023-11-29 04:57:51,782 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:57:51,820 INFO  L225             Difference]: With dead ends: 90957
[2023-11-29 04:57:51,821 INFO  L226             Difference]: Without dead ends: 54163
[2023-11-29 04:57:51,845 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8137 GetRequests, 8131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:57:51,846 INFO  L413           NwaCegarLoop]: 15085 mSDtfsCounter, 34634 mSDsluCounter, 45231 mSDsCounter, 0 mSdLazyCounter, 18675 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34634 SdHoareTripleChecker+Valid, 60316 SdHoareTripleChecker+Invalid, 18676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time
[2023-11-29 04:57:51,846 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34634 Valid, 60316 Invalid, 18676 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 18675 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time]
[2023-11-29 04:57:51,889 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54163 states.
[2023-11-29 04:57:52,253 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54163 to 43073.
[2023-11-29 04:57:52,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43073 states, 43072 states have (on average 1.6656760772659733) internal successors, (71744), 43072 states have internal predecessors, (71744), 0 states have call successors, (0), 0 states 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 04:57:52,337 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43073 states to 43073 states and 71744 transitions.
[2023-11-29 04:57:52,337 INFO  L78                 Accepts]: Start accepts. Automaton has 43073 states and 71744 transitions. Word has length 8136
[2023-11-29 04:57:52,339 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:57:52,340 INFO  L495      AbstractCegarLoop]: Abstraction has 43073 states and 71744 transitions.
[2023-11-29 04:57:52,341 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1356.0) internal successors, (8136), 6 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 04:57:52,341 INFO  L276                IsEmpty]: Start isEmpty. Operand 43073 states and 71744 transitions.
[2023-11-29 04:57:52,585 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8138
[2023-11-29 04:57:52,586 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:57:52,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-29 04:57:52,684 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2023-11-29 04:57:52,788 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-29 04:57:52,788 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:57:52,788 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:57:52,790 INFO  L85        PathProgramCache]: Analyzing trace with hash 798372748, now seen corresponding path program 1 times
[2023-11-29 04:57:52,790 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:57:52,790 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047702717]
[2023-11-29 04:57:52,791 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:57:52,791 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:57:53,567 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:57:53,568 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522075777]
[2023-11-29 04:57:53,569 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:57:53,569 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:57:53,569 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:57:53,570 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:57:53,571 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-29 04:58:02,092 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:58:02,324 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36648 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-29 04:58:02,418 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:58:18,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:58:18,378 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:58:18,378 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:58:18,378 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047702717]
[2023-11-29 04:58:18,378 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:58:18,378 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522075777]
[2023-11-29 04:58:18,378 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [522075777] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:58:18,378 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:58:18,381 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 04:58:18,381 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49360670]
[2023-11-29 04:58:18,381 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:58:18,385 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 04:58:18,385 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:58:18,389 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 04:58:18,390 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:58:18,392 INFO  L87              Difference]: Start difference. First operand 43073 states and 71744 transitions. Second operand  has 8 states, 8 states have (on average 1017.125) internal successors, (8137), 8 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 04:58:35,313 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:58:35,313 INFO  L93              Difference]: Finished difference Result 91097 states and 151734 transitions.
[2023-11-29 04:58:35,313 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:58:35,315 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1017.125) internal successors, (8137), 8 states have internal predecessors, (8137), 0 states have call successors, (0), 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 8137
[2023-11-29 04:58:35,317 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:58:35,356 INFO  L225             Difference]: With dead ends: 91097
[2023-11-29 04:58:35,356 INFO  L226             Difference]: Without dead ends: 54269
[2023-11-29 04:58:35,378 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8138 GetRequests, 8130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:58:35,379 INFO  L413           NwaCegarLoop]: 23378 mSDtfsCounter, 34948 mSDsluCounter, 74466 mSDsCounter, 0 mSdLazyCounter, 24045 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34948 SdHoareTripleChecker+Valid, 97844 SdHoareTripleChecker+Invalid, 24047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time
[2023-11-29 04:58:35,379 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34948 Valid, 97844 Invalid, 24047 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2 Valid, 24045 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time]
[2023-11-29 04:58:35,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54269 states.
[2023-11-29 04:58:35,807 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54269 to 43217.
[2023-11-29 04:58:35,840 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43217 states, 43216 states have (on average 1.6653091447611996) internal successors, (71968), 43216 states have internal predecessors, (71968), 0 states have call successors, (0), 0 states 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 04:58:35,892 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43217 states to 43217 states and 71968 transitions.
[2023-11-29 04:58:35,893 INFO  L78                 Accepts]: Start accepts. Automaton has 43217 states and 71968 transitions. Word has length 8137
[2023-11-29 04:58:35,895 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:58:35,895 INFO  L495      AbstractCegarLoop]: Abstraction has 43217 states and 71968 transitions.
[2023-11-29 04:58:35,896 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1017.125) internal successors, (8137), 8 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 04:58:35,896 INFO  L276                IsEmpty]: Start isEmpty. Operand 43217 states and 71968 transitions.
[2023-11-29 04:58:36,141 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8138
[2023-11-29 04:58:36,141 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:58:36,143 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:58:36,239 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-29 04:58:36,344 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:58:36,344 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:58:36,344 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:58:36,345 INFO  L85        PathProgramCache]: Analyzing trace with hash 1206247822, now seen corresponding path program 1 times
[2023-11-29 04:58:36,345 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:58:36,346 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896632284]
[2023-11-29 04:58:36,346 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:58:36,346 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:58:37,151 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:58:37,151 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333243552]
[2023-11-29 04:58:37,153 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:58:37,153 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:58:37,153 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:58:37,154 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:58:37,154 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-29 04:58:46,025 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:58:46,261 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36649 conjuncts, 13 conjunts are in the unsatisfiable core
[2023-11-29 04:58:46,354 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:58:51,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:58:51,144 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:58:51,144 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:58:51,145 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896632284]
[2023-11-29 04:58:51,145 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:58:51,145 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333243552]
[2023-11-29 04:58:51,145 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333243552] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:58:51,145 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:58:51,147 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 04:58:51,147 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846083484]
[2023-11-29 04:58:51,147 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:58:51,151 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 04:58:51,151 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:58:51,155 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 04:58:51,155 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2023-11-29 04:58:51,157 INFO  L87              Difference]: Start difference. First operand 43217 states and 71968 transitions. Second operand  has 7 states, 7 states have (on average 1162.4285714285713) internal successors, (8137), 7 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 04:59:09,876 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:59:09,876 INFO  L93              Difference]: Finished difference Result 102533 states and 170752 transitions.
[2023-11-29 04:59:09,877 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 04:59:09,878 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1162.4285714285713) internal successors, (8137), 7 states have internal predecessors, (8137), 0 states have call successors, (0), 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 8137
[2023-11-29 04:59:09,881 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:59:09,925 INFO  L225             Difference]: With dead ends: 102533
[2023-11-29 04:59:09,926 INFO  L226             Difference]: Without dead ends: 65561
[2023-11-29 04:59:09,949 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8139 GetRequests, 8131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2023-11-29 04:59:09,949 INFO  L413           NwaCegarLoop]: 31710 mSDtfsCounter, 34703 mSDsluCounter, 101797 mSDsCounter, 0 mSdLazyCounter, 29981 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34703 SdHoareTripleChecker+Valid, 133507 SdHoareTripleChecker+Invalid, 29985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time
[2023-11-29 04:59:09,950 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [34703 Valid, 133507 Invalid, 29985 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4 Valid, 29981 Invalid, 0 Unknown, 0 Unchecked, 17.7s Time]
[2023-11-29 04:59:10,000 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65561 states.
[2023-11-29 04:59:10,438 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65561 to 43109.
[2023-11-29 04:59:10,473 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43109 states, 43108 states have (on average 1.665584114317528) internal successors, (71800), 43108 states have internal predecessors, (71800), 0 states have call successors, (0), 0 states 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 04:59:10,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43109 states to 43109 states and 71800 transitions.
[2023-11-29 04:59:10,527 INFO  L78                 Accepts]: Start accepts. Automaton has 43109 states and 71800 transitions. Word has length 8137
[2023-11-29 04:59:10,529 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:59:10,529 INFO  L495      AbstractCegarLoop]: Abstraction has 43109 states and 71800 transitions.
[2023-11-29 04:59:10,530 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1162.4285714285713) internal successors, (8137), 7 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 04:59:10,531 INFO  L276                IsEmpty]: Start isEmpty. Operand 43109 states and 71800 transitions.
[2023-11-29 04:59:10,899 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8138
[2023-11-29 04:59:10,899 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:59:10,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:59:10,995 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-29 04:59:11,101 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:59:11,101 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:59:11,102 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:59:11,103 INFO  L85        PathProgramCache]: Analyzing trace with hash -296127152, now seen corresponding path program 1 times
[2023-11-29 04:59:11,103 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:59:11,103 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013553482]
[2023-11-29 04:59:11,103 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:59:11,103 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:59:11,815 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:59:11,815 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112356886]
[2023-11-29 04:59:11,817 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:59:11,817 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:59:11,817 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:59:11,818 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:59:11,819 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-29 04:59:20,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:59:21,021 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36652 conjuncts, 11 conjunts are in the unsatisfiable core
[2023-11-29 04:59:21,110 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 04:59:27,547 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 04:59:27,548 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 04:59:27,548 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 04:59:27,548 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013553482]
[2023-11-29 04:59:27,548 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 04:59:27,548 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112356886]
[2023-11-29 04:59:27,548 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112356886] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 04:59:27,548 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 04:59:27,550 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-29 04:59:27,551 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626339028]
[2023-11-29 04:59:27,551 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 04:59:27,555 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-29 04:59:27,555 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 04:59:27,559 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-29 04:59:27,559 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-11-29 04:59:27,561 INFO  L87              Difference]: Start difference. First operand 43109 states and 71800 transitions. Second operand  has 6 states, 6 states have (on average 1356.1666666666667) internal successors, (8137), 6 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 04:59:39,717 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 04:59:39,718 INFO  L93              Difference]: Finished difference Result 91063 states and 151682 transitions.
[2023-11-29 04:59:39,718 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-29 04:59:39,720 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1356.1666666666667) internal successors, (8137), 6 states have internal predecessors, (8137), 0 states have call successors, (0), 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 8137
[2023-11-29 04:59:39,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 04:59:39,763 INFO  L225             Difference]: With dead ends: 91063
[2023-11-29 04:59:39,763 INFO  L226             Difference]: Without dead ends: 54199
[2023-11-29 04:59:39,785 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8138 GetRequests, 8132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-29 04:59:39,786 INFO  L413           NwaCegarLoop]: 15085 mSDtfsCounter, 25359 mSDsluCounter, 45231 mSDsCounter, 0 mSdLazyCounter, 18675 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25359 SdHoareTripleChecker+Valid, 60316 SdHoareTripleChecker+Invalid, 18676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time
[2023-11-29 04:59:39,786 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25359 Valid, 60316 Invalid, 18676 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 18675 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time]
[2023-11-29 04:59:39,830 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54199 states.
[2023-11-29 04:59:40,228 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54199 to 43145.
[2023-11-29 04:59:40,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43145 states, 43144 states have (on average 1.6655386612275171) internal successors, (71858), 43144 states have internal predecessors, (71858), 0 states have call successors, (0), 0 states 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 04:59:40,314 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43145 states to 43145 states and 71858 transitions.
[2023-11-29 04:59:40,315 INFO  L78                 Accepts]: Start accepts. Automaton has 43145 states and 71858 transitions. Word has length 8137
[2023-11-29 04:59:40,317 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 04:59:40,317 INFO  L495      AbstractCegarLoop]: Abstraction has 43145 states and 71858 transitions.
[2023-11-29 04:59:40,318 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1356.1666666666667) internal successors, (8137), 6 states have internal predecessors, (8137), 0 states have call successors, (0), 0 states 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 04:59:40,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 43145 states and 71858 transitions.
[2023-11-29 04:59:40,563 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8139
[2023-11-29 04:59:40,564 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 04:59:40,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 04:59:40,661 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0
[2023-11-29 04:59:40,765 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:59:40,766 INFO  L420      AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 04:59:40,766 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 04:59:40,768 INFO  L85        PathProgramCache]: Analyzing trace with hash 473015282, now seen corresponding path program 1 times
[2023-11-29 04:59:40,768 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 04:59:40,768 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310854035]
[2023-11-29 04:59:40,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:59:40,769 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 04:59:41,615 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 04:59:41,615 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219027697]
[2023-11-29 04:59:41,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 04:59:41,616 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 04:59:41,617 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 04:59:41,617 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 04:59:41,618 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-29 04:59:50,507 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 04:59:50,742 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36651 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-29 04:59:50,833 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:00:06,892 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 05:00:06,892 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 05:00:06,892 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:00:06,892 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310854035]
[2023-11-29 05:00:06,892 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:00:06,892 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219027697]
[2023-11-29 05:00:06,893 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219027697] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 05:00:06,893 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 05:00:06,895 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-29 05:00:06,896 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471966474]
[2023-11-29 05:00:06,896 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:00:06,901 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-29 05:00:06,901 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:00:06,905 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-29 05:00:06,905 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2023-11-29 05:00:06,907 INFO  L87              Difference]: Start difference. First operand 43145 states and 71858 transitions. Second operand  has 8 states, 8 states have (on average 1017.25) internal successors, (8138), 8 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 05:00:25,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-29 05:00:25,651 INFO  L93              Difference]: Finished difference Result 91241 states and 151958 transitions.
[2023-11-29 05:00:25,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-29 05:00:25,653 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1017.25) internal successors, (8138), 8 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 8138
[2023-11-29 05:00:25,656 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-29 05:00:25,695 INFO  L225             Difference]: With dead ends: 91241
[2023-11-29 05:00:25,695 INFO  L226             Difference]: Without dead ends: 54341
[2023-11-29 05:00:25,716 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8139 GetRequests, 8131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90
[2023-11-29 05:00:25,716 INFO  L413           NwaCegarLoop]: 23356 mSDtfsCounter, 31321 mSDsluCounter, 85076 mSDsCounter, 0 mSdLazyCounter, 27054 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31321 SdHoareTripleChecker+Valid, 108432 SdHoareTripleChecker+Invalid, 27056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time
[2023-11-29 05:00:25,717 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31321 Valid, 108432 Invalid, 27056 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2 Valid, 27054 Invalid, 0 Unknown, 0 Unchecked, 17.8s Time]
[2023-11-29 05:00:25,759 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54341 states.
[2023-11-29 05:00:26,078 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54341 to 43325.
[2023-11-29 05:00:26,112 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43325 states, 43324 states have (on average 1.6650817099067492) internal successors, (72138), 43324 states have internal predecessors, (72138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-29 05:00:26,167 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43325 states to 43325 states and 72138 transitions.
[2023-11-29 05:00:26,167 INFO  L78                 Accepts]: Start accepts. Automaton has 43325 states and 72138 transitions. Word has length 8138
[2023-11-29 05:00:26,169 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-29 05:00:26,169 INFO  L495      AbstractCegarLoop]: Abstraction has 43325 states and 72138 transitions.
[2023-11-29 05:00:26,171 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1017.25) internal successors, (8138), 8 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 05:00:26,171 INFO  L276                IsEmpty]: Start isEmpty. Operand 43325 states and 72138 transitions.
[2023-11-29 05:00:26,479 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8139
[2023-11-29 05:00:26,479 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-29 05:00:26,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2023-11-29 05:00:26,577 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-29 05:00:26,681 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:00:26,681 INFO  L420      AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-29 05:00:26,682 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-29 05:00:26,683 INFO  L85        PathProgramCache]: Analyzing trace with hash 232240688, now seen corresponding path program 1 times
[2023-11-29 05:00:26,683 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-29 05:00:26,683 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170561694]
[2023-11-29 05:00:26,684 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:00:26,684 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-29 05:00:27,396 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-29 05:00:27,396 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396080624]
[2023-11-29 05:00:27,398 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-29 05:00:27,399 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-29 05:00:27,399 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-29 05:00:27,400 INFO  L229       MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-29 05:00:27,401 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03b926d-7a2a-45d5-a562-d9c7f049344c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process
[2023-11-29 05:00:36,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-29 05:00:36,587 INFO  L262         TraceCheckSpWp]: Trace formula consists of 36652 conjuncts, 13 conjunts are in the unsatisfiable core
[2023-11-29 05:00:36,678 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-29 05:00:42,682 INFO  L134       CoverageAnalysis]: Checked inductivity of 231 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-29 05:00:42,682 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-29 05:00:42,683 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-29 05:00:42,683 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170561694]
[2023-11-29 05:00:42,683 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-29 05:00:42,683 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396080624]
[2023-11-29 05:00:42,683 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [396080624] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-29 05:00:42,683 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-29 05:00:42,685 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-11-29 05:00:42,685 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302854851]
[2023-11-29 05:00:42,686 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-29 05:00:42,689 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-29 05:00:42,689 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-29 05:00:42,693 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-29 05:00:42,693 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2023-11-29 05:00:42,695 INFO  L87              Difference]: Start difference. First operand 43325 states and 72138 transitions. Second operand  has 7 states, 7 states have (on average 1162.5714285714287) internal successors, (8138), 7 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)