./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/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_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/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_572d8557-f3b9-414b-8685-a3a8a2e6e037/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 302e0b25ab5e724f956de377dfc80a50b1a465bcb2a4596e79c73f892ebfd861
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 20:27:37,892 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 20:27:37,952 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 20:27:37,956 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 20:27:37,957 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 20:27:37,978 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 20:27:37,979 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 20:27:37,979 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 20:27:37,980 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 20:27:37,980 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 20:27:37,981 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 20:27:37,981 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 20:27:37,982 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 20:27:37,983 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 20:27:37,983 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 20:27:37,984 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 20:27:37,984 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 20:27:37,985 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 20:27:37,985 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 20:27:37,986 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 20:27:37,986 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 20:27:37,987 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 20:27:37,987 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 20:27:37,988 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 20:27:37,988 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 20:27:37,989 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 20:27:37,989 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 20:27:37,990 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 20:27:37,990 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:27:37,991 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 20:27:37,991 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 20:27:37,991 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 20:27:37,992 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 20:27:37,992 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 20:27:37,992 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 20:27:37,992 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 20:27:37,992 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 20:27:37,992 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 20:27:37,993 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 20:27:37,993 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_572d8557-f3b9-414b-8685-a3a8a2e6e037/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_572d8557-f3b9-414b-8685-a3a8a2e6e037/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 -> 302e0b25ab5e724f956de377dfc80a50b1a465bcb2a4596e79c73f892ebfd861
[2023-11-28 20:27:38,182 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 20:27:38,202 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 20:27:38,204 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 20:27:38,206 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 20:27:38,206 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 20:27:38,207 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c
[2023-11-28 20:27:41,009 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 20:27:41,349 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 20:27:41,349 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c
[2023-11-28 20:27:41,371 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data/2f9b2c4c9/9a09f1f167cf40838b85265a614bf227/FLAG97d9f38c0
[2023-11-28 20:27:41,383 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data/2f9b2c4c9/9a09f1f167cf40838b85265a614bf227
[2023-11-28 20:27:41,386 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 20:27:41,387 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 20:27:41,388 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 20:27:41,388 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 20:27:41,392 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 20:27:41,393 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:27:41" (1/1) ...
[2023-11-28 20:27:41,394 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10093d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:41, skipping insertion in model container
[2023-11-28 20:27:41,394 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:27:41" (1/1) ...
[2023-11-28 20:27:41,515 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 20:27:41,734 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_572d8557-f3b9-414b-8685-a3a8a2e6e037/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c[1176,1189]
[2023-11-28 20:27:42,414 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:27:42,421 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 20:27:42,430 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_572d8557-f3b9-414b-8685-a3a8a2e6e037/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c[1176,1189]
[2023-11-28 20:27:42,903 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:27:42,917 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 20:27:42,917 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42 WrapperNode
[2023-11-28 20:27:42,917 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 20:27:42,918 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 20:27:42,918 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 20:27:42,919 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 20:27:42,926 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:43,063 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:44,784 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26628
[2023-11-28 20:27:44,784 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 20:27:44,785 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 20:27:44,785 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 20:27:44,785 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 20:27:44,796 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:44,796 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:45,082 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:45,370 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-28 20:27:45,371 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:45,371 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:45,749 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:45,832 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:45,973 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:46,059 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:46,459 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 20:27:46,460 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 20:27:46,460 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 20:27:46,460 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 20:27:46,461 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (1/1) ...
[2023-11-28 20:27:46,466 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:27:46,474 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:27:46,484 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 20:27:46,486 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 20:27:46,509 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 20:27:46,510 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 20:27:46,510 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 20:27:46,510 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 20:27:47,536 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 20:27:47,538 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 20:28:00,977 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 20:28:01,268 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 20:28:01,269 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 20:28:01,271 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:28:01 BoogieIcfgContainer
[2023-11-28 20:28:01,271 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 20:28:01,273 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 20:28:01,273 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 20:28:01,276 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 20:28:01,276 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:27:41" (1/3) ...
[2023-11-28 20:28:01,277 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c1944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:28:01, skipping insertion in model container
[2023-11-28 20:28:01,277 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:27:42" (2/3) ...
[2023-11-28 20:28:01,277 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c1944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:28:01, skipping insertion in model container
[2023-11-28 20:28:01,277 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:28:01" (3/3) ...
[2023-11-28 20:28:01,278 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.telephony.7.prop1-func-interl.c
[2023-11-28 20:28:01,292 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 20:28:01,292 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 20:28:01,412 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 20:28:01,418 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;@1b8f8420, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 20:28:01,418 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 20:28:01,437 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6095 states, 6093 states have (on average 1.670605612998523) internal successors, (10179), 6094 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:01,458 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2023-11-28 20:28:01,458 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:01,459 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]
[2023-11-28 20:28:01,460 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:01,464 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:01,464 INFO  L85        PathProgramCache]: Analyzing trace with hash -1667613835, now seen corresponding path program 1 times
[2023-11-28 20:28:01,471 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:01,471 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870981355]
[2023-11-28 20:28:01,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:01,472 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:01,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:03,287 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:03,288 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:03,288 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870981355]
[2023-11-28 20:28:03,289 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870981355] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:03,289 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:03,290 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:03,291 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734152818]
[2023-11-28 20:28:03,292 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:03,297 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:03,297 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:03,327 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:03,328 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:03,347 INFO  L87              Difference]: Start difference. First operand  has 6095 states, 6093 states have (on average 1.670605612998523) internal successors, (10179), 6094 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:03,681 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:03,681 INFO  L93              Difference]: Finished difference Result 11958 states and 19974 transitions.
[2023-11-28 20:28:03,682 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:03,683 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 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 324
[2023-11-28 20:28:03,685 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:03,725 INFO  L225             Difference]: With dead ends: 11958
[2023-11-28 20:28:03,725 INFO  L226             Difference]: Without dead ends: 6095
[2023-11-28 20:28:03,736 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:03,739 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 1 mSDsluCounter, 20339 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30511 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:03,740 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30511 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:28:03,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6095 states.
[2023-11-28 20:28:03,918 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6095.
[2023-11-28 20:28:03,930 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6095 states, 6094 states have (on average 1.6700032819166393) internal successors, (10177), 6094 states have internal predecessors, (10177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:03,949 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 10177 transitions.
[2023-11-28 20:28:03,950 INFO  L78                 Accepts]: Start accepts. Automaton has 6095 states and 10177 transitions. Word has length 324
[2023-11-28 20:28:03,952 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:03,952 INFO  L495      AbstractCegarLoop]: Abstraction has 6095 states and 10177 transitions.
[2023-11-28 20:28:03,952 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:03,953 INFO  L276                IsEmpty]: Start isEmpty. Operand 6095 states and 10177 transitions.
[2023-11-28 20:28:03,960 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 326
[2023-11-28 20:28:03,960 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:03,960 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]
[2023-11-28 20:28:03,961 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 20:28:03,961 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:03,961 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:03,962 INFO  L85        PathProgramCache]: Analyzing trace with hash -154694465, now seen corresponding path program 1 times
[2023-11-28 20:28:03,962 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:03,962 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955994539]
[2023-11-28 20:28:03,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:03,963 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:04,118 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:04,597 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:04,597 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:04,598 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955994539]
[2023-11-28 20:28:04,598 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955994539] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:04,598 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:04,598 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:04,599 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161119728]
[2023-11-28 20:28:04,599 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:04,601 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:04,601 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:04,602 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:04,602 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:04,603 INFO  L87              Difference]: Start difference. First operand 6095 states and 10177 transitions. Second operand  has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:04,888 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:04,888 INFO  L93              Difference]: Finished difference Result 11961 states and 19972 transitions.
[2023-11-28 20:28:04,889 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:04,889 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 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 325
[2023-11-28 20:28:04,890 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:04,916 INFO  L225             Difference]: With dead ends: 11961
[2023-11-28 20:28:04,916 INFO  L226             Difference]: Without dead ends: 6098
[2023-11-28 20:28:04,922 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:04,924 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 1 mSDsluCounter, 20337 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30509 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:04,924 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30509 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 20:28:04,936 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6098 states.
[2023-11-28 20:28:05,164 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 6097.
[2023-11-28 20:28:05,176 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6097 states, 6096 states have (on average 1.6697834645669292) internal successors, (10179), 6096 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:05,197 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6097 states to 6097 states and 10179 transitions.
[2023-11-28 20:28:05,198 INFO  L78                 Accepts]: Start accepts. Automaton has 6097 states and 10179 transitions. Word has length 325
[2023-11-28 20:28:05,198 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:05,199 INFO  L495      AbstractCegarLoop]: Abstraction has 6097 states and 10179 transitions.
[2023-11-28 20:28:05,199 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:05,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 6097 states and 10179 transitions.
[2023-11-28 20:28:05,204 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2023-11-28 20:28:05,204 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:05,205 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]
[2023-11-28 20:28:05,205 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 20:28:05,205 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:05,208 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:05,208 INFO  L85        PathProgramCache]: Analyzing trace with hash -710991665, now seen corresponding path program 1 times
[2023-11-28 20:28:05,209 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:05,209 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444068587]
[2023-11-28 20:28:05,209 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:05,209 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:05,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:06,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:06,111 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:06,111 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444068587]
[2023-11-28 20:28:06,112 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444068587] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:06,112 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:06,112 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:06,112 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308886653]
[2023-11-28 20:28:06,113 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:06,114 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 20:28:06,114 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:06,115 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 20:28:06,115 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:28:06,115 INFO  L87              Difference]: Start difference. First operand 6097 states and 10179 transitions. Second operand  has 5 states, 5 states have (on average 65.2) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:06,693 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:06,694 INFO  L93              Difference]: Finished difference Result 18060 states and 30155 transitions.
[2023-11-28 20:28:06,694 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:28:06,695 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 65.2) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 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 326
[2023-11-28 20:28:06,695 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:06,762 INFO  L225             Difference]: With dead ends: 18060
[2023-11-28 20:28:06,762 INFO  L226             Difference]: Without dead ends: 12195
[2023-11-28 20:28:06,772 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-28 20:28:06,773 INFO  L413           NwaCegarLoop]: 10569 mSDtfsCounter, 39601 mSDsluCounter, 20335 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39601 SdHoareTripleChecker+Valid, 30904 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:06,774 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [39601 Valid, 30904 Invalid, 21 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:28:06,794 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12195 states.
[2023-11-28 20:28:06,943 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12195 to 6342.
[2023-11-28 20:28:06,954 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6342 states, 6341 states have (on average 1.6694527677022553) internal successors, (10586), 6341 states have internal predecessors, (10586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:06,972 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6342 states to 6342 states and 10586 transitions.
[2023-11-28 20:28:06,972 INFO  L78                 Accepts]: Start accepts. Automaton has 6342 states and 10586 transitions. Word has length 326
[2023-11-28 20:28:06,973 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:06,973 INFO  L495      AbstractCegarLoop]: Abstraction has 6342 states and 10586 transitions.
[2023-11-28 20:28:06,974 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 65.2) internal successors, (326), 4 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:06,974 INFO  L276                IsEmpty]: Start isEmpty. Operand 6342 states and 10586 transitions.
[2023-11-28 20:28:07,182 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 20:28:07,182 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:07,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:28:07,186 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 20:28:07,186 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:07,186 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:07,188 INFO  L85        PathProgramCache]: Analyzing trace with hash 1389074397, now seen corresponding path program 1 times
[2023-11-28 20:28:07,188 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:07,189 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685207708]
[2023-11-28 20:28:07,189 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:07,190 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:07,771 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:07,772 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507327293]
[2023-11-28 20:28:07,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:07,773 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:07,773 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:07,776 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:07,784 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 20:28:12,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:12,598 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18594 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:28:12,745 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:13,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:13,002 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:13,002 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:13,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685207708]
[2023-11-28 20:28:13,002 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:13,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507327293]
[2023-11-28 20:28:13,003 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507327293] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:13,003 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:13,004 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:13,005 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364021072]
[2023-11-28 20:28:13,005 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:13,012 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:13,012 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:13,018 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:13,019 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:13,020 INFO  L87              Difference]: Start difference. First operand 6342 states and 10586 transitions. Second operand  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:13,488 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:13,488 INFO  L93              Difference]: Finished difference Result 12217 states and 20395 transitions.
[2023-11-28 20:28:13,488 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:13,490 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4145
[2023-11-28 20:28:13,492 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:13,510 INFO  L225             Difference]: With dead ends: 12217
[2023-11-28 20:28:13,510 INFO  L226             Difference]: Without dead ends: 6352
[2023-11-28 20:28:13,519 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4144 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:13,520 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 12 mSDsluCounter, 20334 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30506 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:13,520 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30506 Invalid, 18 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 20:28:13,535 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6352 states.
[2023-11-28 20:28:13,660 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 6344.
[2023-11-28 20:28:13,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6344 states, 6343 states have (on average 1.6692416837458617) internal successors, (10588), 6343 states have internal predecessors, (10588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:13,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 10588 transitions.
[2023-11-28 20:28:13,687 INFO  L78                 Accepts]: Start accepts. Automaton has 6344 states and 10588 transitions. Word has length 4145
[2023-11-28 20:28:13,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:13,690 INFO  L495      AbstractCegarLoop]: Abstraction has 6344 states and 10588 transitions.
[2023-11-28 20:28:13,691 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:13,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 6344 states and 10588 transitions.
[2023-11-28 20:28:13,929 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 20:28:13,929 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:13,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:28:13,979 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 20:28:14,133 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:14,134 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:14,134 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:14,136 INFO  L85        PathProgramCache]: Analyzing trace with hash 1804675023, now seen corresponding path program 1 times
[2023-11-28 20:28:14,136 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:14,136 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942096015]
[2023-11-28 20:28:14,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:14,136 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:14,618 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:14,619 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557147286]
[2023-11-28 20:28:14,619 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:14,620 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:14,620 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:14,621 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:14,636 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 20:28:18,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:19,001 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18595 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:28:19,059 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:19,199 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:19,200 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:19,200 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:19,200 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942096015]
[2023-11-28 20:28:19,200 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:19,200 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557147286]
[2023-11-28 20:28:19,200 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [557147286] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:19,201 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:19,202 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:19,202 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342885098]
[2023-11-28 20:28:19,202 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:19,208 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:19,208 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:19,213 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:19,213 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:19,214 INFO  L87              Difference]: Start difference. First operand 6344 states and 10588 transitions. Second operand  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:19,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:19,396 INFO  L93              Difference]: Finished difference Result 12220 states and 20397 transitions.
[2023-11-28 20:28:19,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:19,398 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4145
[2023-11-28 20:28:19,399 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:19,407 INFO  L225             Difference]: With dead ends: 12220
[2023-11-28 20:28:19,407 INFO  L226             Difference]: Without dead ends: 6353
[2023-11-28 20:28:19,412 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4144 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:19,413 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 12 mSDsluCounter, 20334 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30506 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:19,414 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30506 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 20:28:19,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6353 states.
[2023-11-28 20:28:19,489 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6345.
[2023-11-28 20:28:19,495 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6345 states, 6344 states have (on average 1.6691361916771752) internal successors, (10589), 6344 states have internal predecessors, (10589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:19,503 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 10589 transitions.
[2023-11-28 20:28:19,503 INFO  L78                 Accepts]: Start accepts. Automaton has 6345 states and 10589 transitions. Word has length 4145
[2023-11-28 20:28:19,505 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:19,505 INFO  L495      AbstractCegarLoop]: Abstraction has 6345 states and 10589 transitions.
[2023-11-28 20:28:19,506 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:19,506 INFO  L276                IsEmpty]: Start isEmpty. Operand 6345 states and 10589 transitions.
[2023-11-28 20:28:19,588 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 20:28:19,588 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:19,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:28:19,637 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 20:28:19,791 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:19,792 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:19,792 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:19,793 INFO  L85        PathProgramCache]: Analyzing trace with hash 1210696257, now seen corresponding path program 1 times
[2023-11-28 20:28:19,793 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:19,794 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73932594]
[2023-11-28 20:28:19,794 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:19,795 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:20,237 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:20,238 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494953971]
[2023-11-28 20:28:20,239 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:20,240 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:20,240 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:20,241 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:20,246 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 20:28:24,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:24,517 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18596 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:28:24,577 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:24,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:24,699 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:24,700 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:24,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73932594]
[2023-11-28 20:28:24,700 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:24,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494953971]
[2023-11-28 20:28:24,700 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [494953971] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:24,700 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:24,702 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:24,702 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743974537]
[2023-11-28 20:28:24,702 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:24,707 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:24,707 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:24,712 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:24,712 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:24,714 INFO  L87              Difference]: Start difference. First operand 6345 states and 10589 transitions. Second operand  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:24,904 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:24,904 INFO  L93              Difference]: Finished difference Result 12222 states and 20399 transitions.
[2023-11-28 20:28:24,905 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:24,906 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4145
[2023-11-28 20:28:24,909 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:24,922 INFO  L225             Difference]: With dead ends: 12222
[2023-11-28 20:28:24,922 INFO  L226             Difference]: Without dead ends: 6354
[2023-11-28 20:28:24,930 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4144 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:24,930 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 12 mSDsluCounter, 20334 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30506 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:24,931 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30506 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 20:28:24,940 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6354 states.
[2023-11-28 20:28:25,014 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6354 to 6346.
[2023-11-28 20:28:25,023 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6346 states, 6345 states have (on average 1.66903073286052) internal successors, (10590), 6345 states have internal predecessors, (10590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:25,034 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6346 states to 6346 states and 10590 transitions.
[2023-11-28 20:28:25,034 INFO  L78                 Accepts]: Start accepts. Automaton has 6346 states and 10590 transitions. Word has length 4145
[2023-11-28 20:28:25,037 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:25,038 INFO  L495      AbstractCegarLoop]: Abstraction has 6346 states and 10590 transitions.
[2023-11-28 20:28:25,039 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:25,039 INFO  L276                IsEmpty]: Start isEmpty. Operand 6346 states and 10590 transitions.
[2023-11-28 20:28:25,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 20:28:25,166 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:25,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:28:25,225 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 20:28:25,372 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:25,372 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:25,372 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:25,373 INFO  L85        PathProgramCache]: Analyzing trace with hash 859525391, now seen corresponding path program 1 times
[2023-11-28 20:28:25,374 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:25,374 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644182491]
[2023-11-28 20:28:25,374 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:25,374 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:25,780 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:25,780 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884906389]
[2023-11-28 20:28:25,781 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:25,781 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:25,782 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:25,782 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:25,783 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 20:28:29,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:29,764 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18597 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:28:29,834 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:29,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:29,977 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:29,977 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:29,977 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644182491]
[2023-11-28 20:28:29,977 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:29,977 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884906389]
[2023-11-28 20:28:29,978 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [884906389] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:29,978 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:29,979 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:29,980 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628014747]
[2023-11-28 20:28:29,980 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:29,985 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:29,985 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:29,989 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:29,989 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:29,991 INFO  L87              Difference]: Start difference. First operand 6346 states and 10590 transitions. Second operand  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:30,186 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:30,186 INFO  L93              Difference]: Finished difference Result 12224 states and 20401 transitions.
[2023-11-28 20:28:30,187 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:30,188 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4145
[2023-11-28 20:28:30,191 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:30,201 INFO  L225             Difference]: With dead ends: 12224
[2023-11-28 20:28:30,201 INFO  L226             Difference]: Without dead ends: 6355
[2023-11-28 20:28:30,207 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4144 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:30,208 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 12 mSDsluCounter, 20334 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30506 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:30,208 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30506 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 20:28:30,217 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6355 states.
[2023-11-28 20:28:30,292 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 6347.
[2023-11-28 20:28:30,300 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6347 states, 6346 states have (on average 1.6689253072801764) internal successors, (10591), 6346 states have internal predecessors, (10591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:30,310 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6347 states to 6347 states and 10591 transitions.
[2023-11-28 20:28:30,310 INFO  L78                 Accepts]: Start accepts. Automaton has 6347 states and 10591 transitions. Word has length 4145
[2023-11-28 20:28:30,313 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:30,313 INFO  L495      AbstractCegarLoop]: Abstraction has 6347 states and 10591 transitions.
[2023-11-28 20:28:30,314 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:30,315 INFO  L276                IsEmpty]: Start isEmpty. Operand 6347 states and 10591 transitions.
[2023-11-28 20:28:30,479 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 20:28:30,479 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:30,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:28:30,525 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-28 20:28:30,684 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:30,684 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:30,685 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:30,687 INFO  L85        PathProgramCache]: Analyzing trace with hash 1409885661, now seen corresponding path program 1 times
[2023-11-28 20:28:30,687 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:30,687 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479093854]
[2023-11-28 20:28:30,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:30,688 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:31,046 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:31,047 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887848524]
[2023-11-28 20:28:31,048 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:31,048 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:31,048 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:31,049 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:31,052 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-28 20:28:35,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:35,153 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18598 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 20:28:35,232 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:35,317 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:35,317 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:35,318 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:35,318 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479093854]
[2023-11-28 20:28:35,318 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:35,318 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887848524]
[2023-11-28 20:28:35,318 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [887848524] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:35,318 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:35,319 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 20:28:35,320 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996466535]
[2023-11-28 20:28:35,320 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:35,325 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:35,325 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:35,330 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:35,330 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:35,332 INFO  L87              Difference]: Start difference. First operand 6347 states and 10591 transitions. Second operand  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:35,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:35,480 INFO  L93              Difference]: Finished difference Result 12226 states and 20403 transitions.
[2023-11-28 20:28:35,481 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:35,481 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4145
[2023-11-28 20:28:35,486 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:35,499 INFO  L225             Difference]: With dead ends: 12226
[2023-11-28 20:28:35,499 INFO  L226             Difference]: Without dead ends: 6356
[2023-11-28 20:28:35,507 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4144 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:35,507 INFO  L413           NwaCegarLoop]: 10172 mSDtfsCounter, 12 mSDsluCounter, 20334 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30506 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:35,508 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30506 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 20:28:35,517 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6356 states.
[2023-11-28 20:28:35,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6348.
[2023-11-28 20:28:35,594 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6688199149204348) internal successors, (10592), 6347 states have internal predecessors, (10592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:35,605 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10592 transitions.
[2023-11-28 20:28:35,605 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10592 transitions. Word has length 4145
[2023-11-28 20:28:35,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:35,608 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10592 transitions.
[2023-11-28 20:28:35,609 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 4 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:35,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10592 transitions.
[2023-11-28 20:28:35,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4146
[2023-11-28 20:28:35,735 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:35,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:28:35,793 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-28 20:28:35,952 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-28 20:28:35,952 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:35,952 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:35,954 INFO  L85        PathProgramCache]: Analyzing trace with hash 1665801131, now seen corresponding path program 1 times
[2023-11-28 20:28:35,954 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:35,954 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206376378]
[2023-11-28 20:28:35,954 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:35,954 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:36,306 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:36,306 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040211310]
[2023-11-28 20:28:36,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:36,308 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:36,308 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:36,309 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:36,310 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-28 20:28:40,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:40,565 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18599 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:28:40,640 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:42,260 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:42,260 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:42,260 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:42,261 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206376378]
[2023-11-28 20:28:42,261 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:42,261 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040211310]
[2023-11-28 20:28:42,261 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040211310] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:42,261 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:42,263 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:28:42,263 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765691769]
[2023-11-28 20:28:42,263 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:42,268 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:42,268 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:42,273 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:42,273 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:42,274 INFO  L87              Difference]: Start difference. First operand 6348 states and 10592 transitions. Second operand  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 3 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:45,457 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:45,457 INFO  L93              Difference]: Finished difference Result 12545 states and 20935 transitions.
[2023-11-28 20:28:45,457 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:45,458 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 3 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4145
[2023-11-28 20:28:45,459 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:45,468 INFO  L225             Difference]: With dead ends: 12545
[2023-11-28 20:28:45,468 INFO  L226             Difference]: Without dead ends: 6674
[2023-11-28 20:28:45,474 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4145 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:28:45,474 INFO  L413           NwaCegarLoop]: 8704 mSDtfsCounter, 19436 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 3125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19436 SdHoareTripleChecker+Valid, 9334 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:45,474 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19436 Valid, 9334 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3125 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-11-28 20:28:45,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6674 states.
[2023-11-28 20:28:45,537 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 6348.
[2023-11-28 20:28:45,542 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6686623601701591) internal successors, (10591), 6347 states have internal predecessors, (10591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:45,550 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10591 transitions.
[2023-11-28 20:28:45,550 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10591 transitions. Word has length 4145
[2023-11-28 20:28:45,551 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:45,551 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10591 transitions.
[2023-11-28 20:28:45,552 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.25) internal successors, (4145), 3 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:45,552 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10591 transitions.
[2023-11-28 20:28:45,630 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4147
[2023-11-28 20:28:45,630 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:45,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-28 20:28:45,678 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-28 20:28:45,833 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-11-28 20:28:45,834 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:45,834 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:45,835 INFO  L85        PathProgramCache]: Analyzing trace with hash -1815866179, now seen corresponding path program 1 times
[2023-11-28 20:28:45,835 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:45,835 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933852898]
[2023-11-28 20:28:45,836 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:45,836 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:46,148 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:46,148 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817733591]
[2023-11-28 20:28:46,149 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:46,149 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:46,149 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:46,150 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:46,151 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-28 20:28:50,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:50,190 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18600 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:28:50,240 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:28:51,793 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:28:51,793 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:28:51,793 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:28:51,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933852898]
[2023-11-28 20:28:51,794 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:28:51,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817733591]
[2023-11-28 20:28:51,794 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817733591] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:28:51,794 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:28:51,795 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:28:51,796 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664761892]
[2023-11-28 20:28:51,796 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:28:51,800 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:28:51,801 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:28:51,804 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:28:51,804 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:28:51,805 INFO  L87              Difference]: Start difference. First operand 6348 states and 10591 transitions. Second operand  has 4 states, 4 states have (on average 1036.5) internal successors, (4146), 3 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:54,996 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:28:54,996 INFO  L93              Difference]: Finished difference Result 12743 states and 21268 transitions.
[2023-11-28 20:28:54,996 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:28:54,998 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.5) internal successors, (4146), 3 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4146
[2023-11-28 20:28:54,998 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:28:55,006 INFO  L225             Difference]: With dead ends: 12743
[2023-11-28 20:28:55,007 INFO  L226             Difference]: Without dead ends: 6872
[2023-11-28 20:28:55,013 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4146 GetRequests, 4143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:28:55,014 INFO  L413           NwaCegarLoop]: 9030 mSDtfsCounter, 19331 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19331 SdHoareTripleChecker+Valid, 9987 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:28:55,014 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19331 Valid, 9987 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3137 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-11-28 20:28:55,022 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6872 states.
[2023-11-28 20:28:55,080 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 6348.
[2023-11-28 20:28:55,085 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6685048054198834) internal successors, (10590), 6347 states have internal predecessors, (10590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:55,093 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10590 transitions.
[2023-11-28 20:28:55,093 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10590 transitions. Word has length 4146
[2023-11-28 20:28:55,094 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:28:55,094 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10590 transitions.
[2023-11-28 20:28:55,095 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.5) internal successors, (4146), 3 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:28:55,095 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10590 transitions.
[2023-11-28 20:28:55,173 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4148
[2023-11-28 20:28:55,173 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:28:55,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:28:55,221 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-28 20:28:55,376 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:55,376 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:28:55,377 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:28:55,378 INFO  L85        PathProgramCache]: Analyzing trace with hash 1432481971, now seen corresponding path program 1 times
[2023-11-28 20:28:55,378 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:28:55,378 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783998395]
[2023-11-28 20:28:55,378 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:55,379 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:28:55,772 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:28:55,773 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762990297]
[2023-11-28 20:28:55,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:28:55,773 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:28:55,774 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:28:55,774 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:28:55,775 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-28 20:28:59,655 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:28:59,761 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18601 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:28:59,813 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:01,492 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:01,492 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:01,492 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:01,492 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783998395]
[2023-11-28 20:29:01,492 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:01,492 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762990297]
[2023-11-28 20:29:01,493 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762990297] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:01,493 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:01,494 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:01,494 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993555931]
[2023-11-28 20:29:01,495 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:01,500 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:01,500 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:01,503 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:01,503 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:01,504 INFO  L87              Difference]: Start difference. First operand 6348 states and 10590 transitions. Second operand  has 4 states, 4 states have (on average 1036.75) internal successors, (4147), 3 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:04,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:04,799 INFO  L93              Difference]: Finished difference Result 12759 states and 21293 transitions.
[2023-11-28 20:29:04,799 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:29:04,800 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1036.75) internal successors, (4147), 3 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4147
[2023-11-28 20:29:04,800 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:04,805 INFO  L225             Difference]: With dead ends: 12759
[2023-11-28 20:29:04,805 INFO  L226             Difference]: Without dead ends: 6888
[2023-11-28 20:29:04,809 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4147 GetRequests, 4144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:29:04,810 INFO  L413           NwaCegarLoop]: 9055 mSDtfsCounter, 19320 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19320 SdHoareTripleChecker+Valid, 10038 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:04,810 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19320 Valid, 10038 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time]
[2023-11-28 20:29:04,820 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6888 states.
[2023-11-28 20:29:04,884 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6888 to 6348.
[2023-11-28 20:29:04,891 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6683472506696078) internal successors, (10589), 6347 states have internal predecessors, (10589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:04,901 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10589 transitions.
[2023-11-28 20:29:04,901 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10589 transitions. Word has length 4147
[2023-11-28 20:29:04,903 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:04,903 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10589 transitions.
[2023-11-28 20:29:04,904 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1036.75) internal successors, (4147), 3 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:04,904 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10589 transitions.
[2023-11-28 20:29:04,998 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4149
[2023-11-28 20:29:04,998 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:05,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:29:05,048 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-28 20:29:05,201 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:05,201 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:05,202 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:05,203 INFO  L85        PathProgramCache]: Analyzing trace with hash 1711408041, now seen corresponding path program 1 times
[2023-11-28 20:29:05,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:05,203 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108158457]
[2023-11-28 20:29:05,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:05,204 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:05,499 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:05,499 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215474895]
[2023-11-28 20:29:05,500 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:05,500 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:05,500 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:05,501 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:05,502 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-28 20:29:09,465 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:09,566 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18602 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:29:09,615 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:11,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:11,061 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:11,061 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:11,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108158457]
[2023-11-28 20:29:11,061 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:11,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215474895]
[2023-11-28 20:29:11,061 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215474895] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:11,061 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:11,062 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:11,062 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595738092]
[2023-11-28 20:29:11,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:11,066 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:11,066 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:11,069 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:11,069 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:11,070 INFO  L87              Difference]: Start difference. First operand 6348 states and 10589 transitions. Second operand  has 4 states, 4 states have (on average 1037.0) internal successors, (4148), 3 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:14,363 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:14,363 INFO  L93              Difference]: Finished difference Result 12766 states and 21302 transitions.
[2023-11-28 20:29:14,364 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:29:14,365 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1037.0) internal successors, (4148), 3 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4148
[2023-11-28 20:29:14,366 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:14,370 INFO  L225             Difference]: With dead ends: 12766
[2023-11-28 20:29:14,371 INFO  L226             Difference]: Without dead ends: 6895
[2023-11-28 20:29:14,374 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4148 GetRequests, 4145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:29:14,374 INFO  L413           NwaCegarLoop]: 9064 mSDtfsCounter, 19313 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19313 SdHoareTripleChecker+Valid, 10057 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:14,375 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19313 Valid, 10057 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time]
[2023-11-28 20:29:14,382 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6895 states.
[2023-11-28 20:29:14,426 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 6348.
[2023-11-28 20:29:14,431 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6681896959193319) internal successors, (10588), 6347 states have internal predecessors, (10588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:14,438 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10588 transitions.
[2023-11-28 20:29:14,438 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10588 transitions. Word has length 4148
[2023-11-28 20:29:14,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:14,439 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10588 transitions.
[2023-11-28 20:29:14,440 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1037.0) internal successors, (4148), 3 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:14,440 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10588 transitions.
[2023-11-28 20:29:14,517 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4150
[2023-11-28 20:29:14,517 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:14,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:29:14,573 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-28 20:29:14,720 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:14,720 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:14,721 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:14,722 INFO  L85        PathProgramCache]: Analyzing trace with hash 703593284, now seen corresponding path program 1 times
[2023-11-28 20:29:14,722 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:14,722 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856605650]
[2023-11-28 20:29:14,722 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:14,722 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:15,019 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:15,019 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234240343]
[2023-11-28 20:29:15,020 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:15,020 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:15,020 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:15,021 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:15,023 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-28 20:29:18,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:19,007 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18603 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:29:19,058 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:20,923 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:20,923 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:20,923 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:20,923 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856605650]
[2023-11-28 20:29:20,923 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:20,924 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234240343]
[2023-11-28 20:29:20,924 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234240343] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:20,924 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:20,925 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:20,925 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856746321]
[2023-11-28 20:29:20,925 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:20,928 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:20,928 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:20,930 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:20,931 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:20,931 INFO  L87              Difference]: Start difference. First operand 6348 states and 10588 transitions. Second operand  has 4 states, 4 states have (on average 1037.25) internal successors, (4149), 3 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:24,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:24,396 INFO  L93              Difference]: Finished difference Result 12770 states and 21306 transitions.
[2023-11-28 20:29:24,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:29:24,397 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1037.25) internal successors, (4149), 3 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4149
[2023-11-28 20:29:24,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:24,403 INFO  L225             Difference]: With dead ends: 12770
[2023-11-28 20:29:24,403 INFO  L226             Difference]: Without dead ends: 6899
[2023-11-28 20:29:24,406 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4149 GetRequests, 4146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:29:24,407 INFO  L413           NwaCegarLoop]: 9068 mSDtfsCounter, 19308 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 3143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19308 SdHoareTripleChecker+Valid, 10066 SdHoareTripleChecker+Invalid, 3143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:24,407 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19308 Valid, 10066 Invalid, 3143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3143 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2023-11-28 20:29:24,414 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6899 states.
[2023-11-28 20:29:24,454 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6348.
[2023-11-28 20:29:24,459 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6680321411690562) internal successors, (10587), 6347 states have internal predecessors, (10587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:24,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10587 transitions.
[2023-11-28 20:29:24,466 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10587 transitions. Word has length 4149
[2023-11-28 20:29:24,467 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:24,467 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10587 transitions.
[2023-11-28 20:29:24,468 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1037.25) internal successors, (4149), 3 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:24,468 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10587 transitions.
[2023-11-28 20:29:24,541 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4151
[2023-11-28 20:29:24,541 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:24,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:29:24,586 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-28 20:29:24,743 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:24,744 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:24,744 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:24,745 INFO  L85        PathProgramCache]: Analyzing trace with hash 658402676, now seen corresponding path program 1 times
[2023-11-28 20:29:24,746 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:24,746 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715653165]
[2023-11-28 20:29:24,746 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:24,746 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:25,039 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:25,039 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595250970]
[2023-11-28 20:29:25,040 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:25,040 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:25,040 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:25,041 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:25,042 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-28 20:29:28,878 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:28,995 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18604 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:29:29,143 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:30,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:30,579 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:30,579 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:30,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715653165]
[2023-11-28 20:29:30,579 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:30,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595250970]
[2023-11-28 20:29:30,580 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [595250970] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:30,580 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:30,581 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:30,581 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634014791]
[2023-11-28 20:29:30,581 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:30,584 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:30,584 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:30,587 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:30,587 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:30,588 INFO  L87              Difference]: Start difference. First operand 6348 states and 10587 transitions. Second operand  has 4 states, 4 states have (on average 1037.5) internal successors, (4150), 3 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:33,859 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:33,860 INFO  L93              Difference]: Finished difference Result 12777 states and 21315 transitions.
[2023-11-28 20:29:33,861 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:29:33,862 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1037.5) internal successors, (4150), 3 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4150
[2023-11-28 20:29:33,862 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:33,867 INFO  L225             Difference]: With dead ends: 12777
[2023-11-28 20:29:33,867 INFO  L226             Difference]: Without dead ends: 6906
[2023-11-28 20:29:33,871 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4150 GetRequests, 4147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:29:33,871 INFO  L413           NwaCegarLoop]: 9077 mSDtfsCounter, 19301 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 3145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19301 SdHoareTripleChecker+Valid, 10085 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:33,871 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19301 Valid, 10085 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3145 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2023-11-28 20:29:33,879 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6906 states.
[2023-11-28 20:29:33,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6906 to 6348.
[2023-11-28 20:29:33,924 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6678745864187805) internal successors, (10586), 6347 states have internal predecessors, (10586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:33,930 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10586 transitions.
[2023-11-28 20:29:33,930 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10586 transitions. Word has length 4150
[2023-11-28 20:29:33,931 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:33,931 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10586 transitions.
[2023-11-28 20:29:33,932 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1037.5) internal successors, (4150), 3 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:33,932 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10586 transitions.
[2023-11-28 20:29:34,005 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4152
[2023-11-28 20:29:34,005 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:34,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:29:34,050 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2023-11-28 20:29:34,207 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:34,207 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:34,207 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:34,210 INFO  L85        PathProgramCache]: Analyzing trace with hash -1574478379, now seen corresponding path program 1 times
[2023-11-28 20:29:34,210 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:34,210 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078290156]
[2023-11-28 20:29:34,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:34,211 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:34,502 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:34,503 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511999604]
[2023-11-28 20:29:34,503 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:34,503 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:34,503 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:34,504 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:34,505 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-28 20:29:38,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:38,522 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18605 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:29:38,572 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:40,432 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:40,432 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:40,432 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:40,432 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078290156]
[2023-11-28 20:29:40,433 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:40,433 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511999604]
[2023-11-28 20:29:40,433 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [511999604] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:40,433 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:40,434 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:40,434 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479175389]
[2023-11-28 20:29:40,434 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:40,438 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:40,438 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:40,441 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:40,441 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:40,442 INFO  L87              Difference]: Start difference. First operand 6348 states and 10586 transitions. Second operand  has 4 states, 4 states have (on average 1037.75) internal successors, (4151), 3 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:43,630 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:43,630 INFO  L93              Difference]: Finished difference Result 12781 states and 21319 transitions.
[2023-11-28 20:29:43,630 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:29:43,631 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1037.75) internal successors, (4151), 3 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4151
[2023-11-28 20:29:43,632 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:43,639 INFO  L225             Difference]: With dead ends: 12781
[2023-11-28 20:29:43,639 INFO  L226             Difference]: Without dead ends: 6910
[2023-11-28 20:29:43,643 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4151 GetRequests, 4148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:29:43,644 INFO  L413           NwaCegarLoop]: 9081 mSDtfsCounter, 19296 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 3147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19296 SdHoareTripleChecker+Valid, 10094 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:43,644 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19296 Valid, 10094 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3147 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-11-28 20:29:43,654 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6910 states.
[2023-11-28 20:29:43,701 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6910 to 6348.
[2023-11-28 20:29:43,705 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6677170316685048) internal successors, (10585), 6347 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:43,711 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10585 transitions.
[2023-11-28 20:29:43,712 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10585 transitions. Word has length 4151
[2023-11-28 20:29:43,713 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:43,713 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10585 transitions.
[2023-11-28 20:29:43,714 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1037.75) internal successors, (4151), 3 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:43,714 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10585 transitions.
[2023-11-28 20:29:43,786 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4153
[2023-11-28 20:29:43,786 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:43,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:29:43,831 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2023-11-28 20:29:43,988 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-28 20:29:43,989 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:43,989 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:43,990 INFO  L85        PathProgramCache]: Analyzing trace with hash 924965951, now seen corresponding path program 1 times
[2023-11-28 20:29:43,990 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:43,990 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381660674]
[2023-11-28 20:29:43,991 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:43,991 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:44,287 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:44,287 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582702629]
[2023-11-28 20:29:44,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:44,288 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:44,288 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:44,289 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:44,289 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-28 20:29:48,130 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:48,240 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18606 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:29:48,291 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:50,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:50,028 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:50,028 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:50,028 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381660674]
[2023-11-28 20:29:50,028 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:50,028 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582702629]
[2023-11-28 20:29:50,028 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [582702629] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:50,028 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:50,030 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:50,030 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080988680]
[2023-11-28 20:29:50,030 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:50,033 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:50,033 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:50,035 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:50,036 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:50,036 INFO  L87              Difference]: Start difference. First operand 6348 states and 10585 transitions. Second operand  has 4 states, 4 states have (on average 1038.0) internal successors, (4152), 3 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:53,275 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:29:53,275 INFO  L93              Difference]: Finished difference Result 12788 states and 21328 transitions.
[2023-11-28 20:29:53,275 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:29:53,276 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1038.0) internal successors, (4152), 3 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4152
[2023-11-28 20:29:53,277 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:29:53,282 INFO  L225             Difference]: With dead ends: 12788
[2023-11-28 20:29:53,282 INFO  L226             Difference]: Without dead ends: 6917
[2023-11-28 20:29:53,285 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4152 GetRequests, 4149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:29:53,286 INFO  L413           NwaCegarLoop]: 9090 mSDtfsCounter, 19289 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 3149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19289 SdHoareTripleChecker+Valid, 10113 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:29:53,286 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19289 Valid, 10113 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3149 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2023-11-28 20:29:53,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6917 states.
[2023-11-28 20:29:53,332 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6917 to 6348.
[2023-11-28 20:29:53,337 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6675594769182291) internal successors, (10584), 6347 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:53,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10584 transitions.
[2023-11-28 20:29:53,343 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10584 transitions. Word has length 4152
[2023-11-28 20:29:53,344 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:29:53,344 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10584 transitions.
[2023-11-28 20:29:53,345 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1038.0) internal successors, (4152), 3 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:29:53,345 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10584 transitions.
[2023-11-28 20:29:53,417 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4154
[2023-11-28 20:29:53,417 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:29:53,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-28 20:29:53,462 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2023-11-28 20:29:53,619 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-28 20:29:53,620 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:29:53,620 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:29:53,621 INFO  L85        PathProgramCache]: Analyzing trace with hash 1775323238, now seen corresponding path program 1 times
[2023-11-28 20:29:53,621 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:29:53,622 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930847111]
[2023-11-28 20:29:53,622 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:53,622 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:29:53,965 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:29:53,965 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15899633]
[2023-11-28 20:29:53,966 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:29:53,966 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:29:53,966 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:29:53,967 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:29:53,968 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2023-11-28 20:29:57,975 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:29:58,081 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18607 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:29:58,132 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:29:59,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:29:59,942 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:29:59,942 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:29:59,942 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930847111]
[2023-11-28 20:29:59,942 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:29:59,942 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15899633]
[2023-11-28 20:29:59,942 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [15899633] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:29:59,942 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:29:59,943 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:29:59,943 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939944206]
[2023-11-28 20:29:59,943 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:29:59,946 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:29:59,946 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:29:59,949 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:29:59,949 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:29:59,950 INFO  L87              Difference]: Start difference. First operand 6348 states and 10584 transitions. Second operand  has 4 states, 4 states have (on average 1038.25) internal successors, (4153), 3 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:03,014 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:30:03,014 INFO  L93              Difference]: Finished difference Result 12792 states and 21332 transitions.
[2023-11-28 20:30:03,014 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:30:03,015 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1038.25) internal successors, (4153), 3 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4153
[2023-11-28 20:30:03,016 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:30:03,022 INFO  L225             Difference]: With dead ends: 12792
[2023-11-28 20:30:03,022 INFO  L226             Difference]: Without dead ends: 6921
[2023-11-28 20:30:03,025 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4153 GetRequests, 4150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:30:03,026 INFO  L413           NwaCegarLoop]: 9094 mSDtfsCounter, 19284 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 3151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19284 SdHoareTripleChecker+Valid, 10122 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-11-28 20:30:03,026 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19284 Valid, 10122 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3151 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-11-28 20:30:03,035 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6921 states.
[2023-11-28 20:30:03,082 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 6348.
[2023-11-28 20:30:03,087 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6674019221679535) internal successors, (10583), 6347 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:03,094 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10583 transitions.
[2023-11-28 20:30:03,094 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10583 transitions. Word has length 4153
[2023-11-28 20:30:03,094 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:30:03,094 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10583 transitions.
[2023-11-28 20:30:03,095 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1038.25) internal successors, (4153), 3 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:03,095 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10583 transitions.
[2023-11-28 20:30:03,168 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4155
[2023-11-28 20:30:03,168 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:30:03,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:30:03,212 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0
[2023-11-28 20:30:03,370 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-11-28 20:30:03,370 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:30:03,370 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:30:03,371 INFO  L85        PathProgramCache]: Analyzing trace with hash 227729418, now seen corresponding path program 1 times
[2023-11-28 20:30:03,371 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:30:03,372 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925281016]
[2023-11-28 20:30:03,372 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:03,372 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:30:03,660 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:30:03,660 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362540905]
[2023-11-28 20:30:03,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:03,661 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:03,661 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:30:03,661 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:30:03,663 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2023-11-28 20:30:07,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:30:07,663 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18608 conjuncts, 12 conjunts are in the unsatisfiable core
[2023-11-28 20:30:07,718 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:30:09,597 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:30:09,597 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:30:09,597 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:30:09,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925281016]
[2023-11-28 20:30:09,597 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:30:09,597 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362540905]
[2023-11-28 20:30:09,597 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362540905] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:30:09,598 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:30:09,599 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:30:09,599 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198784802]
[2023-11-28 20:30:09,599 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:30:09,602 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:30:09,602 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:30:09,605 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:30:09,605 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:30:09,606 INFO  L87              Difference]: Start difference. First operand 6348 states and 10583 transitions. Second operand  has 4 states, 4 states have (on average 1038.5) internal successors, (4154), 3 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:13,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:30:13,024 INFO  L93              Difference]: Finished difference Result 12799 states and 21341 transitions.
[2023-11-28 20:30:13,025 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:30:13,026 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1038.5) internal successors, (4154), 3 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4154
[2023-11-28 20:30:13,026 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:30:13,032 INFO  L225             Difference]: With dead ends: 12799
[2023-11-28 20:30:13,032 INFO  L226             Difference]: Without dead ends: 6928
[2023-11-28 20:30:13,036 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4154 GetRequests, 4151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:30:13,036 INFO  L413           NwaCegarLoop]: 9103 mSDtfsCounter, 19277 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19277 SdHoareTripleChecker+Valid, 10141 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2023-11-28 20:30:13,036 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [19277 Valid, 10141 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3153 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2023-11-28 20:30:13,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6928 states.
[2023-11-28 20:30:13,084 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6348.
[2023-11-28 20:30:13,089 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6672443674176776) internal successors, (10582), 6347 states have internal predecessors, (10582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:13,096 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10582 transitions.
[2023-11-28 20:30:13,096 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10582 transitions. Word has length 4154
[2023-11-28 20:30:13,097 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:30:13,097 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10582 transitions.
[2023-11-28 20:30:13,098 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1038.5) internal successors, (4154), 3 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:13,098 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10582 transitions.
[2023-11-28 20:30:13,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4156
[2023-11-28 20:30:13,170 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:30:13,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:30:13,215 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0
[2023-11-28 20:30:13,371 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2023-11-28 20:30:13,371 INFO  L420      AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:30:13,372 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:30:13,372 INFO  L85        PathProgramCache]: Analyzing trace with hash -363926793, now seen corresponding path program 1 times
[2023-11-28 20:30:13,372 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:30:13,373 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285573641]
[2023-11-28 20:30:13,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:13,373 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:30:13,660 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:30:13,660 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526794869]
[2023-11-28 20:30:13,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:13,661 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:13,661 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:30:13,662 INFO  L229       MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:30:13,663 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2023-11-28 20:30:17,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:30:17,580 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18609 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-28 20:30:17,637 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:30:18,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:30:18,029 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:30:18,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2023-11-28 20:30:18,177 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:30:18,177 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285573641]
[2023-11-28 20:30:18,177 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:30:18,177 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526794869]
[2023-11-28 20:30:18,177 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526794869] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 20:30:18,177 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 20:30:18,180 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-28 20:30:18,180 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911310119]
[2023-11-28 20:30:18,180 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:30:18,183 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 20:30:18,183 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:30:18,186 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 20:30:18,186 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2023-11-28 20:30:18,188 INFO  L87              Difference]: Start difference. First operand 6348 states and 10582 transitions. Second operand  has 6 states, 6 states have (on average 665.6666666666666) internal successors, (3994), 6 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:28,859 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:30:28,859 INFO  L93              Difference]: Finished difference Result 29392 states and 48868 transitions.
[2023-11-28 20:30:28,859 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 20:30:28,860 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 665.6666666666666) internal successors, (3994), 6 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4155
[2023-11-28 20:30:28,863 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:30:28,876 INFO  L225             Difference]: With dead ends: 29392
[2023-11-28 20:30:28,876 INFO  L226             Difference]: Without dead ends: 18075
[2023-11-28 20:30:28,883 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8309 GetRequests, 8298 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2023-11-28 20:30:28,884 INFO  L413           NwaCegarLoop]: 16978 mSDtfsCounter, 45069 mSDsluCounter, 41082 mSDsCounter, 0 mSdLazyCounter, 13116 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45069 SdHoareTripleChecker+Valid, 58060 SdHoareTripleChecker+Invalid, 13540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 13116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time
[2023-11-28 20:30:28,884 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45069 Valid, 58060 Invalid, 13540 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [424 Valid, 13116 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time]
[2023-11-28 20:30:28,898 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18075 states.
[2023-11-28 20:30:28,974 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 6348.
[2023-11-28 20:30:28,979 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6348 states, 6347 states have (on average 1.6672443674176776) internal successors, (10582), 6347 states have internal predecessors, (10582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:28,987 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10582 transitions.
[2023-11-28 20:30:28,987 INFO  L78                 Accepts]: Start accepts. Automaton has 6348 states and 10582 transitions. Word has length 4155
[2023-11-28 20:30:28,989 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:30:28,989 INFO  L495      AbstractCegarLoop]: Abstraction has 6348 states and 10582 transitions.
[2023-11-28 20:30:28,990 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 665.6666666666666) internal successors, (3994), 6 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:28,990 INFO  L276                IsEmpty]: Start isEmpty. Operand 6348 states and 10582 transitions.
[2023-11-28 20:30:29,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4157
[2023-11-28 20:30:29,062 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:30:29,063 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 20:30:29,109 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0
[2023-11-28 20:30:29,263 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:29,264 INFO  L420      AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:30:29,264 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:30:29,265 INFO  L85        PathProgramCache]: Analyzing trace with hash -1484914309, now seen corresponding path program 1 times
[2023-11-28 20:30:29,265 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:30:29,265 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892752949]
[2023-11-28 20:30:29,266 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:29,266 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:30:29,652 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:30:29,652 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567789848]
[2023-11-28 20:30:29,653 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:29,654 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:29,654 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:30:29,654 INFO  L229       MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:30:29,655 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2023-11-28 20:30:33,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:30:33,998 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18613 conjuncts, 29 conjunts are in the unsatisfiable core
[2023-11-28 20:30:34,060 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:30:35,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:30:35,556 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:30:35,556 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:30:35,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892752949]
[2023-11-28 20:30:35,556 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:30:35,556 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567789848]
[2023-11-28 20:30:35,556 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567789848] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:30:35,556 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:30:35,557 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-28 20:30:35,557 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386209416]
[2023-11-28 20:30:35,557 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:30:35,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-28 20:30:35,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:30:35,563 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-28 20:30:35,563 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2023-11-28 20:30:35,564 INFO  L87              Difference]: Start difference. First operand 6348 states and 10582 transitions. Second operand  has 7 states, 7 states have (on average 593.7142857142857) internal successors, (4156), 6 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:43,156 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:30:43,156 INFO  L93              Difference]: Finished difference Result 18812 states and 31370 transitions.
[2023-11-28 20:30:43,157 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-11-28 20:30:43,158 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 593.7142857142857) internal successors, (4156), 6 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4156
[2023-11-28 20:30:43,158 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:30:43,168 INFO  L225             Difference]: With dead ends: 18812
[2023-11-28 20:30:43,168 INFO  L226             Difference]: Without dead ends: 12939
[2023-11-28 20:30:43,173 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4161 GetRequests, 4150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156
[2023-11-28 20:30:43,174 INFO  L413           NwaCegarLoop]: 9007 mSDtfsCounter, 57793 mSDsluCounter, 27333 mSDsCounter, 0 mSdLazyCounter, 10448 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57793 SdHoareTripleChecker+Valid, 36340 SdHoareTripleChecker+Invalid, 10448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:30:43,174 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [57793 Valid, 36340 Invalid, 10448 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 10448 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time]
[2023-11-28 20:30:43,184 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12939 states.
[2023-11-28 20:30:43,239 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 6545.
[2023-11-28 20:30:43,244 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6545 states, 6544 states have (on average 1.6677872860635696) internal successors, (10914), 6544 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:43,251 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6545 states to 6545 states and 10914 transitions.
[2023-11-28 20:30:43,251 INFO  L78                 Accepts]: Start accepts. Automaton has 6545 states and 10914 transitions. Word has length 4156
[2023-11-28 20:30:43,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:30:43,252 INFO  L495      AbstractCegarLoop]: Abstraction has 6545 states and 10914 transitions.
[2023-11-28 20:30:43,253 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 593.7142857142857) internal successors, (4156), 6 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:30:43,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 6545 states and 10914 transitions.
[2023-11-28 20:30:43,325 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4158
[2023-11-28 20:30:43,325 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:30:43,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-28 20:30:43,381 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2023-11-28 20:30:43,526 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:43,527 INFO  L420      AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:30:43,527 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:30:43,529 INFO  L85        PathProgramCache]: Analyzing trace with hash 1838494988, now seen corresponding path program 1 times
[2023-11-28 20:30:43,529 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 20:30:43,529 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776134807]
[2023-11-28 20:30:43,530 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:43,530 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 20:30:43,819 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 20:30:43,819 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362174421]
[2023-11-28 20:30:43,820 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:30:43,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 20:30:43,820 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:30:43,821 INFO  L229       MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 20:30:43,821 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2023-11-28 20:30:48,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:30:48,190 INFO  L262         TraceCheckSpWp]: Trace formula consists of 18614 conjuncts, 170 conjunts are in the unsatisfiable core
[2023-11-28 20:30:48,247 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:31:27,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:31:27,955 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:32:17,502 INFO  L134       CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:32:17,503 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 20:32:17,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776134807]
[2023-11-28 20:32:17,503 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 20:32:17,503 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362174421]
[2023-11-28 20:32:17,503 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [362174421] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-28 20:32:17,503 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-28 20:32:17,506 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 38] total 105
[2023-11-28 20:32:17,506 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408595286]
[2023-11-28 20:32:17,506 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-28 20:32:17,511 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 105 states
[2023-11-28 20:32:17,511 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 20:32:17,515 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants.
[2023-11-28 20:32:17,518 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=10031, Unknown=0, NotChecked=0, Total=10920
[2023-11-28 20:32:17,520 INFO  L87              Difference]: Start difference. First operand 6545 states and 10914 transitions. Second operand  has 105 states, 105 states have (on average 79.11428571428571) internal successors, (8307), 105 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:39:19,084 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101
[2023-11-28 20:39:19,084 WARN  L249               Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory")

[2023-11-28 20:39:19,085 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 971 states. 
[2023-11-28 20:39:19,137 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9274 GetRequests, 8209 SyntacticMatches, 0 SemanticMatches, 1064 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462900 ImplicationChecksByTransitivity, 265.7s TimeCoverageRelationStatistics Valid=101485, Invalid=1033805, Unknown=0, NotChecked=0, Total=1135290
[2023-11-28 20:39:19,137 INFO  L413           NwaCegarLoop]: 22054 mSDtfsCounter, 495648 mSDsluCounter, 1105636 mSDsCounter, 0 mSdLazyCounter, 161806 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495648 SdHoareTripleChecker+Valid, 1127690 SdHoareTripleChecker+Invalid, 162486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 161806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.5s IncrementalHoareTripleChecker+Time
[2023-11-28 20:39:19,138 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [495648 Valid, 1127690 Invalid, 162486 Unknown, 0 Unchecked, 4.0s Time], IncrementalHoareTripleChecker [680 Valid, 161806 Invalid, 0 Unknown, 0 Unchecked, 124.5s Time]
[2023-11-28 20:39:19,194 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0
[2023-11-28 20:39:19,338 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2023-11-28 20:39:19,339 FATAL L?                        ?]: An unrecoverable error occured during an interaction with an SMT solver:
de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")

	at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262)
	at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281)
	at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155)
	at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163)
	at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163)
	at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.<init>(PredicateUnifier.java:789)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377)
	at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:247)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.<init>(NestedWordAutomatonReachableStates.java:960)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.<init>(NestedWordAutomatonReachableStates.java:182)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137)
	at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.<init>(Difference.java:90)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:154)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF
	at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518)
	at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701)
	at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383)
	at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258)
	... 47 more
[2023-11-28 20:39:19,342 INFO  L158              Benchmark]: Toolchain (without parser) took 697954.61ms. Allocated memory was 140.5MB in the beginning and 5.8GB in the end (delta: 5.7GB). Free memory was 90.8MB in the beginning and 3.5GB in the end (delta: -3.4GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB.
[2023-11-28 20:39:19,342 INFO  L158              Benchmark]: CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory is still 48.1MB. There was no memory consumed. Max. memory is 16.1GB.
[2023-11-28 20:39:19,342 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 1529.67ms. Allocated memory was 140.5MB in the beginning and 247.5MB in the end (delta: 107.0MB). Free memory was 90.3MB in the beginning and 111.7MB in the end (delta: -21.3MB). Peak memory consumption was 146.7MB. Max. memory is 16.1GB.
[2023-11-28 20:39:19,343 INFO  L158              Benchmark]: Boogie Procedure Inliner took 1866.21ms. Allocated memory was 247.5MB in the beginning and 1.1GB in the end (delta: 826.3MB). Free memory was 111.7MB in the beginning and 599.0MB in the end (delta: -487.4MB). Peak memory consumption was 482.1MB. Max. memory is 16.1GB.
[2023-11-28 20:39:19,343 INFO  L158              Benchmark]: Boogie Preprocessor took 1674.32ms. Allocated memory is still 1.1GB. Free memory was 598.0MB in the beginning and 465.9MB in the end (delta: 132.1MB). Peak memory consumption was 253.8MB. Max. memory is 16.1GB.
[2023-11-28 20:39:19,343 INFO  L158              Benchmark]: RCFGBuilder took 14811.19ms. Allocated memory was 1.1GB in the beginning and 3.2GB in the end (delta: 2.1GB). Free memory was 465.9MB in the beginning and 2.0GB in the end (delta: -1.5GB). Peak memory consumption was 639.4MB. Max. memory is 16.1GB.
[2023-11-28 20:39:19,343 INFO  L158              Benchmark]: TraceAbstraction took 678068.20ms. Allocated memory was 3.2GB in the beginning and 5.8GB in the end (delta: 2.6GB). Free memory was 2.0GB in the beginning and 3.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB.
[2023-11-28 20:39:19,346 INFO  L338   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory is still 48.1MB. There was no memory consumed. Max. memory is 16.1GB.
 * CACSL2BoogieTranslator took 1529.67ms. Allocated memory was 140.5MB in the beginning and 247.5MB in the end (delta: 107.0MB). Free memory was 90.3MB in the beginning and 111.7MB in the end (delta: -21.3MB). Peak memory consumption was 146.7MB. Max. memory is 16.1GB.
 * Boogie Procedure Inliner took 1866.21ms. Allocated memory was 247.5MB in the beginning and 1.1GB in the end (delta: 826.3MB). Free memory was 111.7MB in the beginning and 599.0MB in the end (delta: -487.4MB). Peak memory consumption was 482.1MB. Max. memory is 16.1GB.
 * Boogie Preprocessor took 1674.32ms. Allocated memory is still 1.1GB. Free memory was 598.0MB in the beginning and 465.9MB in the end (delta: 132.1MB). Peak memory consumption was 253.8MB. Max. memory is 16.1GB.
 * RCFGBuilder took 14811.19ms. Allocated memory was 1.1GB in the beginning and 3.2GB in the end (delta: 2.1GB). Free memory was 465.9MB in the beginning and 2.0GB in the end (delta: -1.5GB). Peak memory consumption was 639.4MB. Max. memory is 16.1GB.
 * TraceAbstraction took 678068.20ms. Allocated memory was 3.2GB in the beginning and 5.8GB in the end (delta: 2.6GB). Free memory was 2.0GB in the beginning and 3.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")

    de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")
: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
Received shutdown request...
--- End real Ultimate output ---

Execution finished normally
Using bit-precise analysis
Retrying with bit-precise analysis

### Bit-precise run ###
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/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_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/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 302e0b25ab5e724f956de377dfc80a50b1a465bcb2a4596e79c73f892ebfd861
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 20:39:21,397 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 20:39:21,465 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2023-11-28 20:39:21,483 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 20:39:21,484 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 20:39:21,513 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 20:39:21,514 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 20:39:21,514 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 20:39:21,515 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 20:39:21,516 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 20:39:21,516 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 20:39:21,517 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 20:39:21,518 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 20:39:21,518 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 20:39:21,519 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 20:39:21,520 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 20:39:21,520 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 20:39:21,521 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 20:39:21,521 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 20:39:21,522 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 20:39:21,522 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 20:39:21,523 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2023-11-28 20:39:21,523 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2023-11-28 20:39:21,523 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2023-11-28 20:39:21,524 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 20:39:21,524 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 20:39:21,524 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 20:39:21,525 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 20:39:21,525 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 20:39:21,526 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 20:39:21,526 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:39:21,527 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 20:39:21,527 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 20:39:21,527 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 20:39:21,527 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2023-11-28 20:39:21,528 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2023-11-28 20:39:21,528 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 20:39:21,528 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 20:39:21,528 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 20:39:21,529 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 20:39:21,529 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 20:39:21,529 INFO  L153        SettingsManager]:  * Logic for external solver=AUFBV
[2023-11-28 20:39:21,529 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_572d8557-f3b9-414b-8685-a3a8a2e6e037/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_572d8557-f3b9-414b-8685-a3a8a2e6e037/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 -> 302e0b25ab5e724f956de377dfc80a50b1a465bcb2a4596e79c73f892ebfd861
[2023-11-28 20:39:21,888 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 20:39:21,909 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 20:39:21,912 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 20:39:21,913 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 20:39:21,913 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 20:39:21,915 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c
[2023-11-28 20:39:24,703 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 20:39:25,104 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 20:39:25,105 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c
[2023-11-28 20:39:25,132 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data/25c7c1454/b075c685b45743ffb26385d182c9e6a9/FLAGbe852c244
[2023-11-28 20:39:25,145 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/data/25c7c1454/b075c685b45743ffb26385d182c9e6a9
[2023-11-28 20:39:25,148 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 20:39:25,150 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 20:39:25,151 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 20:39:25,151 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 20:39:25,155 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 20:39:25,156 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:39:25" (1/1) ...
[2023-11-28 20:39:25,156 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce9c768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:25, skipping insertion in model container
[2023-11-28 20:39:25,157 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:39:25" (1/1) ...
[2023-11-28 20:39:25,251 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 20:39:25,461 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_572d8557-f3b9-414b-8685-a3a8a2e6e037/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c[1176,1189]
[2023-11-28 20:39:26,037 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:39:26,047 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 20:39:26,056 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_572d8557-f3b9-414b-8685-a3a8a2e6e037/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.telephony.7.prop1-func-interl.c[1176,1189]
[2023-11-28 20:39:26,392 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 20:39:26,404 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 20:39:26,404 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26 WrapperNode
[2023-11-28 20:39:26,404 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 20:39:26,405 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 20:39:26,405 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 20:39:26,406 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 20:39:26,411 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:26,490 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:26,714 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 6682
[2023-11-28 20:39:26,714 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 20:39:26,715 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 20:39:26,715 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 20:39:26,715 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 20:39:26,726 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:26,726 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:26,761 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:26,874 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-28 20:39:26,874 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:26,874 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:27,053 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:27,085 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:27,108 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:27,154 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:27,189 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 20:39:27,190 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 20:39:27,190 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 20:39:27,190 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 20:39:27,191 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (1/1) ...
[2023-11-28 20:39:27,195 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 20:39:27,204 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 20:39:27,217 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 20:39:27,222 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 20:39:27,281 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 20:39:27,281 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2023-11-28 20:39:27,281 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 20:39:27,282 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 20:39:28,159 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 20:39:28,162 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 20:39:45,878 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 20:39:46,181 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 20:39:46,182 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 20:39:46,182 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:39:46 BoogieIcfgContainer
[2023-11-28 20:39:46,182 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 20:39:46,185 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 20:39:46,185 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 20:39:46,188 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 20:39:46,189 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:39:25" (1/3) ...
[2023-11-28 20:39:46,189 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c5bff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:39:46, skipping insertion in model container
[2023-11-28 20:39:46,190 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:26" (2/3) ...
[2023-11-28 20:39:46,190 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c5bff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:39:46, skipping insertion in model container
[2023-11-28 20:39:46,190 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:39:46" (3/3) ...
[2023-11-28 20:39:46,191 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.telephony.7.prop1-func-interl.c
[2023-11-28 20:39:46,210 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 20:39:46,210 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 20:39:46,256 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 20:39:46,263 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;@313df31b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 20:39:46,263 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 20:39:46,267 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:39:46,271 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 5
[2023-11-28 20:39:46,272 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:39:46,272 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1]
[2023-11-28 20:39:46,273 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:39:46,277 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:39:46,277 INFO  L85        PathProgramCache]: Analyzing trace with hash 1827279, now seen corresponding path program 1 times
[2023-11-28 20:39:46,288 INFO  L118   FreeRefinementEngine]: Executing refinement strategy WOLF
[2023-11-28 20:39:46,288 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047213485]
[2023-11-28 20:39:46,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:46,289 INFO  L173          SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3
[2023-11-28 20:39:46,289 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat
[2023-11-28 20:39:46,290 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2023-11-28 20:39:46,292 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2023-11-28 20:39:47,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:39:47,247 INFO  L262         TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-28 20:39:47,273 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:39:47,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:39:47,416 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 20:39:47,417 INFO  L136   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2023-11-28 20:39:47,417 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047213485]
[2023-11-28 20:39:47,418 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047213485] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 20:39:47,418 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 20:39:47,418 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-28 20:39:47,420 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441582331]
[2023-11-28 20:39:47,421 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 20:39:47,425 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 20:39:47,426 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2023-11-28 20:39:47,453 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 20:39:47,454 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 20:39:47,456 INFO  L87              Difference]: Start difference. First operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:39:52,130 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.56s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-11-28 20:39:52,658 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:39:52,658 INFO  L93              Difference]: Finished difference Result 16 states and 24 transitions.
[2023-11-28 20:39:52,660 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 20:39:52,661 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4
[2023-11-28 20:39:52,661 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:39:52,668 INFO  L225             Difference]: With dead ends: 16
[2023-11-28 20:39:52,668 INFO  L226             Difference]: Without dead ends: 9
[2023-11-28 20:39:52,669 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-11-28 20:39:52,673 INFO  L413           NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time
[2023-11-28 20:39:52,674 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time]
[2023-11-28 20:39:52,690 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2023-11-28 20:39:52,698 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8.
[2023-11-28 20:39:52,699 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:39:52,700 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions.
[2023-11-28 20:39:52,700 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4
[2023-11-28 20:39:52,701 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:39:52,701 INFO  L495      AbstractCegarLoop]: Abstraction has 8 states and 8 transitions.
[2023-11-28 20:39:52,701 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:39:52,701 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions.
[2023-11-28 20:39:52,701 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2023-11-28 20:39:52,702 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:39:52,702 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1]
[2023-11-28 20:39:52,707 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0
[2023-11-28 20:39:52,902 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3
[2023-11-28 20:39:52,903 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:39:52,903 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:39:52,903 INFO  L85        PathProgramCache]: Analyzing trace with hash -1393329571, now seen corresponding path program 1 times
[2023-11-28 20:39:52,909 INFO  L118   FreeRefinementEngine]: Executing refinement strategy WOLF
[2023-11-28 20:39:52,910 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405455700]
[2023-11-28 20:39:52,910 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 20:39:52,910 INFO  L173          SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3
[2023-11-28 20:39:52,910 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat
[2023-11-28 20:39:52,911 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2023-11-28 20:39:52,912 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2023-11-28 20:40:02,964 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 20:40:03,150 INFO  L262         TraceCheckSpWp]: Trace formula consists of 5631 conjuncts, 254 conjunts are in the unsatisfiable core
[2023-11-28 20:40:03,257 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 20:40:09,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:40:09,588 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 20:40:18,274 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 20:40:18,274 INFO  L136   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2023-11-28 20:40:18,274 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405455700]
[2023-11-28 20:40:18,275 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleMathsat [405455700] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-28 20:40:18,275 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-28 20:40:18,275 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7
[2023-11-28 20:40:18,275 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366403734]
[2023-11-28 20:40:18,275 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-28 20:40:18,276 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-28 20:40:18,276 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2023-11-28 20:40:18,277 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-28 20:40:18,277 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2023-11-28 20:40:18,277 INFO  L87              Difference]: Start difference. First operand 8 states and 8 transitions. Second operand  has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:40:31,094 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]
[2023-11-28 20:40:33,153 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]
[2023-11-28 20:40:44,176 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.75s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0]
[2023-11-28 20:40:44,357 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 20:40:44,358 INFO  L93              Difference]: Finished difference Result 14 states and 14 transitions.
[2023-11-28 20:40:44,358 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-28 20:40:44,358 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 7
[2023-11-28 20:40:44,358 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 20:40:44,359 INFO  L225             Difference]: With dead ends: 14
[2023-11-28 20:40:44,359 INFO  L226             Difference]: Without dead ends: 12
[2023-11-28 20:40:44,360 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2023-11-28 20:40:44,361 INFO  L413           NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time
[2023-11-28 20:40:44,362 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 1 Unknown, 0 Unchecked, 15.7s Time]
[2023-11-28 20:40:44,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2023-11-28 20:40:44,369 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11.
[2023-11-28 20:40:44,369 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:40:44,369 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2023-11-28 20:40:44,370 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7
[2023-11-28 20:40:44,370 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 20:40:44,370 INFO  L495      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2023-11-28 20:40:44,370 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 20:40:44,370 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2023-11-28 20:40:44,371 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2023-11-28 20:40:44,371 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 20:40:44,371 INFO  L195           NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1]
[2023-11-28 20:40:44,422 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0
[2023-11-28 20:40:44,571 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3
[2023-11-28 20:40:44,572 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 20:40:44,572 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 20:40:44,572 INFO  L85        PathProgramCache]: Analyzing trace with hash -2112524529, now seen corresponding path program 2 times
[2023-11-28 20:40:44,579 INFO  L118   FreeRefinementEngine]: Executing refinement strategy WOLF
[2023-11-28 20:40:44,580 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931472232]
[2023-11-28 20:40:44,580 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-28 20:40:44,580 INFO  L173          SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3
[2023-11-28 20:40:44,580 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat
[2023-11-28 20:40:44,581 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2023-11-28 20:40:44,582 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_572d8557-f3b9-414b-8685-a3a8a2e6e037/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process