./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.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_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/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_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/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_05f7096e-d841-4b0b-aad9-2f40deabd382/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 22b009e1dde85f3dec0a8540aa6b279f8af7153fb7819134db61747ada71a0f6
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-11-28 23:43:43,965 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-28 23:43:44,023 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-28 23:43:44,028 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-28 23:43:44,029 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-28 23:43:44,051 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-28 23:43:44,051 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-28 23:43:44,052 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-28 23:43:44,052 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-28 23:43:44,053 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-28 23:43:44,053 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-28 23:43:44,054 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-28 23:43:44,055 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-28 23:43:44,055 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-28 23:43:44,056 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-28 23:43:44,056 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-28 23:43:44,057 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-28 23:43:44,057 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-28 23:43:44,058 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-28 23:43:44,058 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-28 23:43:44,059 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-28 23:43:44,060 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-28 23:43:44,060 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-28 23:43:44,060 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-28 23:43:44,061 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-28 23:43:44,061 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-28 23:43:44,062 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-28 23:43:44,062 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-28 23:43:44,063 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:43:44,063 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-28 23:43:44,063 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-28 23:43:44,064 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-28 23:43:44,064 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-28 23:43:44,064 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-28 23:43:44,064 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-28 23:43:44,065 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-28 23:43:44,065 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-28 23:43:44,065 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-28 23:43:44,065 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-28 23:43:44,065 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_05f7096e-d841-4b0b-aad9-2f40deabd382/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_05f7096e-d841-4b0b-aad9-2f40deabd382/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 -> 22b009e1dde85f3dec0a8540aa6b279f8af7153fb7819134db61747ada71a0f6
[2023-11-28 23:43:44,272 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-28 23:43:44,292 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-28 23:43:44,294 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-28 23:43:44,295 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-28 23:43:44,296 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-28 23:43:44,297 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c
[2023-11-28 23:43:47,037 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-28 23:43:47,377 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-28 23:43:47,377 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c
[2023-11-28 23:43:47,403 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/data/7b13d6f12/be35d41cd0b843ea95f1607457cbdc0c/FLAGd758ff06b
[2023-11-28 23:43:47,417 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/data/7b13d6f12/be35d41cd0b843ea95f1607457cbdc0c
[2023-11-28 23:43:47,419 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-28 23:43:47,420 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-28 23:43:47,421 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-28 23:43:47,422 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-28 23:43:47,425 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-28 23:43:47,426 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:43:47" (1/1) ...
[2023-11-28 23:43:47,427 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40379922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:47, skipping insertion in model container
[2023-11-28 23:43:47,427 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:43:47" (1/1) ...
[2023-11-28 23:43:47,542 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-28 23:43:47,780 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_05f7096e-d841-4b0b-aad9-2f40deabd382/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c[1174,1187]
[2023-11-28 23:43:48,439 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:43:48,447 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-28 23:43:48,457 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_05f7096e-d841-4b0b-aad9-2f40deabd382/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.needham.3.prop1-func-interl.c[1174,1187]
[2023-11-28 23:43:48,807 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-28 23:43:48,818 INFO  L206         MainTranslator]: Completed translation
[2023-11-28 23:43:48,819 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48 WrapperNode
[2023-11-28 23:43:48,819 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-28 23:43:48,820 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-28 23:43:48,820 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-28 23:43:48,820 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-28 23:43:48,825 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:48,979 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:50,664 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24242
[2023-11-28 23:43:50,664 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-28 23:43:50,665 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-28 23:43:50,665 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-28 23:43:50,665 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-28 23:43:50,673 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:50,674 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:50,960 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:51,208 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2023-11-28 23:43:51,208 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:51,208 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:51,573 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:51,636 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:51,726 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:51,787 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:52,081 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-28 23:43:52,082 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-28 23:43:52,082 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-28 23:43:52,082 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-28 23:43:52,083 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (1/1) ...
[2023-11-28 23:43:52,087 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2023-11-28 23:43:52,096 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:43:52,109 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2023-11-28 23:43:52,197 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2023-11-28 23:43:52,226 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-28 23:43:52,226 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-28 23:43:52,226 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-28 23:43:52,226 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-28 23:43:53,169 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-28 23:43:53,172 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-28 23:44:06,151 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-28 23:44:06,425 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-28 23:44:06,425 INFO  L309             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-28 23:44:06,428 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:06 BoogieIcfgContainer
[2023-11-28 23:44:06,429 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-28 23:44:06,431 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-28 23:44:06,432 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-28 23:44:06,435 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-28 23:44:06,435 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:43:47" (1/3) ...
[2023-11-28 23:44:06,436 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12239a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:44:06, skipping insertion in model container
[2023-11-28 23:44:06,436 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:43:48" (2/3) ...
[2023-11-28 23:44:06,436 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12239a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:44:06, skipping insertion in model container
[2023-11-28 23:44:06,437 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:06" (3/3) ...
[2023-11-28 23:44:06,438 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.needham.3.prop1-func-interl.c
[2023-11-28 23:44:06,456 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-28 23:44:06,457 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-28 23:44:06,605 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-28 23:44:06,612 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;@4ed8cb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-28 23:44:06,613 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-28 23:44:06,636 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5788 states, 5786 states have (on average 1.6709298306256481) internal successors, (9668), 5787 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:06,660 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 315
[2023-11-28 23:44:06,661 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:06,662 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]
[2023-11-28 23:44:06,662 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:06,667 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:06,668 INFO  L85        PathProgramCache]: Analyzing trace with hash 1533401295, now seen corresponding path program 1 times
[2023-11-28 23:44:06,678 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:06,678 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21198018]
[2023-11-28 23:44:06,679 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:06,679 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:07,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:08,431 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:08,431 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:08,432 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21198018]
[2023-11-28 23:44:08,432 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21198018] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:08,432 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:08,433 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:08,434 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877033115]
[2023-11-28 23:44:08,435 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:08,440 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:08,440 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:08,469 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:08,469 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:08,484 INFO  L87              Difference]: Start difference. First operand  has 5788 states, 5786 states have (on average 1.6709298306256481) internal successors, (9668), 5787 states have internal predecessors, (9668), 0 states have call successors, (0), 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 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:08,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:08,823 INFO  L93              Difference]: Finished difference Result 11398 states and 19042 transitions.
[2023-11-28 23:44:08,825 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:08,826 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 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 314
[2023-11-28 23:44:08,828 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:08,869 INFO  L225             Difference]: With dead ends: 11398
[2023-11-28 23:44:08,869 INFO  L226             Difference]: Without dead ends: 5788
[2023-11-28 23:44:08,881 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:08,884 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 1 mSDsluCounter, 19317 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28978 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:08,885 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28978 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:08,914 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5788 states.
[2023-11-28 23:44:09,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 5788.
[2023-11-28 23:44:09,051 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5788 states, 5787 states have (on average 1.6702954898911353) internal successors, (9666), 5787 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:09,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5788 states to 5788 states and 9666 transitions.
[2023-11-28 23:44:09,076 INFO  L78                 Accepts]: Start accepts. Automaton has 5788 states and 9666 transitions. Word has length 314
[2023-11-28 23:44:09,077 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:09,078 INFO  L495      AbstractCegarLoop]: Abstraction has 5788 states and 9666 transitions.
[2023-11-28 23:44:09,078 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:09,078 INFO  L276                IsEmpty]: Start isEmpty. Operand 5788 states and 9666 transitions.
[2023-11-28 23:44:09,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 316
[2023-11-28 23:44:09,085 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:09,085 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]
[2023-11-28 23:44:09,086 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-28 23:44:09,086 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:09,086 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:09,087 INFO  L85        PathProgramCache]: Analyzing trace with hash 292526697, now seen corresponding path program 1 times
[2023-11-28 23:44:09,087 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:09,087 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503140220]
[2023-11-28 23:44:09,087 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:09,087 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:09,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:09,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:09,809 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:09,810 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503140220]
[2023-11-28 23:44:09,810 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503140220] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:09,810 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:09,810 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:09,811 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692256916]
[2023-11-28 23:44:09,811 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:09,813 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:09,813 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:09,814 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:09,814 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:09,814 INFO  L87              Difference]: Start difference. First operand 5788 states and 9666 transitions. Second operand  has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:10,115 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:10,115 INFO  L93              Difference]: Finished difference Result 11401 states and 19040 transitions.
[2023-11-28 23:44:10,116 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:10,116 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 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 315
[2023-11-28 23:44:10,117 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:10,148 INFO  L225             Difference]: With dead ends: 11401
[2023-11-28 23:44:10,148 INFO  L226             Difference]: Without dead ends: 5791
[2023-11-28 23:44:10,155 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:10,156 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 1 mSDsluCounter, 19315 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28976 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 23:44:10,157 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28976 Invalid, 15 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:10,169 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5791 states.
[2023-11-28 23:44:10,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 5790.
[2023-11-28 23:44:10,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5790 states, 5789 states have (on average 1.6700639143202625) internal successors, (9668), 5789 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:10,294 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5790 states to 5790 states and 9668 transitions.
[2023-11-28 23:44:10,294 INFO  L78                 Accepts]: Start accepts. Automaton has 5790 states and 9668 transitions. Word has length 315
[2023-11-28 23:44:10,295 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:10,295 INFO  L495      AbstractCegarLoop]: Abstraction has 5790 states and 9668 transitions.
[2023-11-28 23:44:10,295 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:10,295 INFO  L276                IsEmpty]: Start isEmpty. Operand 5790 states and 9668 transitions.
[2023-11-28 23:44:10,300 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 317
[2023-11-28 23:44:10,300 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:10,301 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]
[2023-11-28 23:44:10,301 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-28 23:44:10,301 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:10,301 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:10,302 INFO  L85        PathProgramCache]: Analyzing trace with hash 2042969771, now seen corresponding path program 1 times
[2023-11-28 23:44:10,302 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:10,302 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464813509]
[2023-11-28 23:44:10,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:10,303 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:10,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:11,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:11,127 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:11,128 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464813509]
[2023-11-28 23:44:11,128 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464813509] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:11,128 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:11,128 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-28 23:44:11,129 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653417417]
[2023-11-28 23:44:11,129 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:11,130 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:44:11,130 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:11,131 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:44:11,131 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 23:44:11,132 INFO  L87              Difference]: Start difference. First operand 5790 states and 9668 transitions. Second operand  has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:11,837 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:11,838 INFO  L93              Difference]: Finished difference Result 17014 states and 28413 transitions.
[2023-11-28 23:44:11,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-28 23:44:11,839 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 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 316
[2023-11-28 23:44:11,839 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:11,898 INFO  L225             Difference]: With dead ends: 17014
[2023-11-28 23:44:11,899 INFO  L226             Difference]: Without dead ends: 11402
[2023-11-28 23:44:11,907 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-11-28 23:44:11,909 INFO  L413           NwaCegarLoop]: 10129 mSDtfsCounter, 18722 mSDsluCounter, 29445 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18722 SdHoareTripleChecker+Valid, 39574 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:11,909 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18722 Valid, 39574 Invalid, 29 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:11,927 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11402 states.
[2023-11-28 23:44:12,054 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5795.
[2023-11-28 23:44:12,065 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5795 states, 5794 states have (on average 1.6698308595098377) internal successors, (9675), 5794 states have internal predecessors, (9675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:12,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 9675 transitions.
[2023-11-28 23:44:12,087 INFO  L78                 Accepts]: Start accepts. Automaton has 5795 states and 9675 transitions. Word has length 316
[2023-11-28 23:44:12,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:12,088 INFO  L495      AbstractCegarLoop]: Abstraction has 5795 states and 9675 transitions.
[2023-11-28 23:44:12,089 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:12,089 INFO  L276                IsEmpty]: Start isEmpty. Operand 5795 states and 9675 transitions.
[2023-11-28 23:44:12,094 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 318
[2023-11-28 23:44:12,094 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:12,094 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]
[2023-11-28 23:44:12,095 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-28 23:44:12,095 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:12,095 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:12,096 INFO  L85        PathProgramCache]: Analyzing trace with hash -928898377, now seen corresponding path program 1 times
[2023-11-28 23:44:12,096 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:12,096 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870542231]
[2023-11-28 23:44:12,097 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:12,097 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:12,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:13,030 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:13,031 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:13,031 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870542231]
[2023-11-28 23:44:13,031 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870542231] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:13,031 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:13,032 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:13,032 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502814121]
[2023-11-28 23:44:13,032 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:13,033 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:44:13,033 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:13,034 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:44:13,034 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-28 23:44:13,035 INFO  L87              Difference]: Start difference. First operand 5795 states and 9675 transitions. Second operand  has 5 states, 5 states have (on average 63.4) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:13,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:13,582 INFO  L93              Difference]: Finished difference Result 17292 states and 28873 transitions.
[2023-11-28 23:44:13,582 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-28 23:44:13,583 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 63.4) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 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 317
[2023-11-28 23:44:13,584 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:13,607 INFO  L225             Difference]: With dead ends: 17292
[2023-11-28 23:44:13,607 INFO  L226             Difference]: Without dead ends: 11675
[2023-11-28 23:44:13,616 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:44:13,617 INFO  L413           NwaCegarLoop]: 10118 mSDtfsCounter, 37892 mSDsluCounter, 19313 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37892 SdHoareTripleChecker+Valid, 29431 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 23:44:13,618 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [37892 Valid, 29431 Invalid, 21 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:44:13,638 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11675 states.
[2023-11-28 23:44:13,775 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11675 to 6073.
[2023-11-28 23:44:13,787 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6073 states, 6072 states have (on average 1.6694664031620554) internal successors, (10137), 6072 states have internal predecessors, (10137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:13,800 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 10137 transitions.
[2023-11-28 23:44:13,800 INFO  L78                 Accepts]: Start accepts. Automaton has 6073 states and 10137 transitions. Word has length 317
[2023-11-28 23:44:13,801 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:13,801 INFO  L495      AbstractCegarLoop]: Abstraction has 6073 states and 10137 transitions.
[2023-11-28 23:44:13,802 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 63.4) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:13,802 INFO  L276                IsEmpty]: Start isEmpty. Operand 6073 states and 10137 transitions.
[2023-11-28 23:44:14,025 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3933
[2023-11-28 23:44:14,025 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:14,028 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 23:44:14,028 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-11-28 23:44:14,029 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:14,029 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:14,031 INFO  L85        PathProgramCache]: Analyzing trace with hash -1192984828, now seen corresponding path program 1 times
[2023-11-28 23:44:14,031 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:14,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417208963]
[2023-11-28 23:44:14,032 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:14,032 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:14,518 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:14,518 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875606287]
[2023-11-28 23:44:14,519 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:14,520 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:14,520 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:14,522 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:14,528 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-28 23:44:19,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:19,278 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16292 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:44:19,383 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:19,582 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:19,583 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:19,583 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:19,583 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417208963]
[2023-11-28 23:44:19,583 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:19,583 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875606287]
[2023-11-28 23:44:19,583 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [875606287] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:19,584 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:19,585 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:19,585 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646607702]
[2023-11-28 23:44:19,586 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:19,591 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:19,591 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:19,595 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:19,595 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:19,597 INFO  L87              Difference]: Start difference. First operand 6073 states and 10137 transitions. Second operand  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:19,806 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:19,807 INFO  L93              Difference]: Finished difference Result 11700 states and 19532 transitions.
[2023-11-28 23:44:19,807 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:19,808 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 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 3932
[2023-11-28 23:44:19,810 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:19,818 INFO  L225             Difference]: With dead ends: 11700
[2023-11-28 23:44:19,818 INFO  L226             Difference]: Without dead ends: 6083
[2023-11-28 23:44:19,825 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3931 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:19,825 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 12 mSDsluCounter, 19312 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28973 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:19,826 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28973 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:19,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6083 states.
[2023-11-28 23:44:19,918 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6083 to 6075.
[2023-11-28 23:44:19,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6075 states, 6074 states have (on average 1.6692459664142245) internal successors, (10139), 6074 states have internal predecessors, (10139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:19,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 10139 transitions.
[2023-11-28 23:44:19,936 INFO  L78                 Accepts]: Start accepts. Automaton has 6075 states and 10139 transitions. Word has length 3932
[2023-11-28 23:44:19,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:19,938 INFO  L495      AbstractCegarLoop]: Abstraction has 6075 states and 10139 transitions.
[2023-11-28 23:44:19,939 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:19,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 6075 states and 10139 transitions.
[2023-11-28 23:44:20,098 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3933
[2023-11-28 23:44:20,098 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:20,100 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:20,140 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-28 23:44:20,301 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:20,301 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:20,302 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:20,303 INFO  L85        PathProgramCache]: Analyzing trace with hash 1012697938, now seen corresponding path program 1 times
[2023-11-28 23:44:20,303 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:20,303 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625044013]
[2023-11-28 23:44:20,304 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:20,304 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:20,836 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:20,836 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157887881]
[2023-11-28 23:44:20,837 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:20,837 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:20,838 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:20,839 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:20,840 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-28 23:44:24,505 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:24,598 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16293 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:44:24,657 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:24,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:24,768 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:24,768 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:24,768 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625044013]
[2023-11-28 23:44:24,769 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:24,769 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157887881]
[2023-11-28 23:44:24,769 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157887881] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:24,769 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:24,770 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:24,771 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474743004]
[2023-11-28 23:44:24,771 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:24,777 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:24,777 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:24,782 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:24,782 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:24,783 INFO  L87              Difference]: Start difference. First operand 6075 states and 10139 transitions. Second operand  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:25,088 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:25,088 INFO  L93              Difference]: Finished difference Result 11703 states and 19534 transitions.
[2023-11-28 23:44:25,089 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:25,090 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 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 3932
[2023-11-28 23:44:25,092 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:25,104 INFO  L225             Difference]: With dead ends: 11703
[2023-11-28 23:44:25,104 INFO  L226             Difference]: Without dead ends: 6084
[2023-11-28 23:44:25,110 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3931 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:25,111 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 12 mSDsluCounter, 19312 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28973 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 23:44:25,111 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28973 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:25,120 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6084 states.
[2023-11-28 23:44:25,197 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 6076.
[2023-11-28 23:44:25,204 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6076 states, 6075 states have (on average 1.6691358024691358) internal successors, (10140), 6075 states have internal predecessors, (10140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:25,215 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6076 states to 6076 states and 10140 transitions.
[2023-11-28 23:44:25,215 INFO  L78                 Accepts]: Start accepts. Automaton has 6076 states and 10140 transitions. Word has length 3932
[2023-11-28 23:44:25,217 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:25,217 INFO  L495      AbstractCegarLoop]: Abstraction has 6076 states and 10140 transitions.
[2023-11-28 23:44:25,218 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:25,219 INFO  L276                IsEmpty]: Start isEmpty. Operand 6076 states and 10140 transitions.
[2023-11-28 23:44:25,377 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3933
[2023-11-28 23:44:25,377 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:25,379 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 23:44:25,420 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-28 23:44:25,580 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:25,580 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:25,581 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:25,582 INFO  L85        PathProgramCache]: Analyzing trace with hash -2135286624, now seen corresponding path program 1 times
[2023-11-28 23:44:25,582 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:25,582 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213479693]
[2023-11-28 23:44:25,583 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:25,583 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:25,961 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:25,961 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282547981]
[2023-11-28 23:44:25,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:25,962 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:25,963 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:25,964 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:25,965 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-28 23:44:29,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:29,565 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16294 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:44:29,613 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:29,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:29,713 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:29,713 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:29,713 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213479693]
[2023-11-28 23:44:29,713 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:29,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282547981]
[2023-11-28 23:44:29,714 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [282547981] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:29,714 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:29,715 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:29,715 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015519439]
[2023-11-28 23:44:29,715 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:29,719 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:29,719 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:29,723 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:29,723 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:29,724 INFO  L87              Difference]: Start difference. First operand 6076 states and 10140 transitions. Second operand  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:29,898 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:29,898 INFO  L93              Difference]: Finished difference Result 11705 states and 19536 transitions.
[2023-11-28 23:44:29,899 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:29,900 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 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 3932
[2023-11-28 23:44:29,903 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:29,911 INFO  L225             Difference]: With dead ends: 11705
[2023-11-28 23:44:29,911 INFO  L226             Difference]: Without dead ends: 6085
[2023-11-28 23:44:29,916 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3931 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:29,917 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 12 mSDsluCounter, 19312 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28973 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 23:44:29,917 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28973 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:29,924 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6085 states.
[2023-11-28 23:44:29,975 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 6077.
[2023-11-28 23:44:29,982 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6077 states, 6076 states have (on average 1.6690256747860435) internal successors, (10141), 6076 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:29,989 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 10141 transitions.
[2023-11-28 23:44:29,990 INFO  L78                 Accepts]: Start accepts. Automaton has 6077 states and 10141 transitions. Word has length 3932
[2023-11-28 23:44:29,991 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:29,992 INFO  L495      AbstractCegarLoop]: Abstraction has 6077 states and 10141 transitions.
[2023-11-28 23:44:29,993 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:29,993 INFO  L276                IsEmpty]: Start isEmpty. Operand 6077 states and 10141 transitions.
[2023-11-28 23:44:30,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3933
[2023-11-28 23:44:30,063 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:30,065 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:30,102 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-11-28 23:44:30,265 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:30,266 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:30,266 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:30,268 INFO  L85        PathProgramCache]: Analyzing trace with hash 547591570, now seen corresponding path program 1 times
[2023-11-28 23:44:30,268 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:30,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601830752]
[2023-11-28 23:44:30,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:30,269 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:30,535 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:30,535 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438637554]
[2023-11-28 23:44:30,536 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:30,536 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:30,536 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:30,537 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:30,538 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-28 23:44:33,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:34,053 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16295 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:44:34,099 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:34,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:34,197 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:34,198 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:34,198 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601830752]
[2023-11-28 23:44:34,198 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:34,198 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438637554]
[2023-11-28 23:44:34,198 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438637554] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:34,198 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:34,200 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:34,200 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027744343]
[2023-11-28 23:44:34,200 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:34,203 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:34,204 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:34,207 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:34,207 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:34,209 INFO  L87              Difference]: Start difference. First operand 6077 states and 10141 transitions. Second operand  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:34,364 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:34,365 INFO  L93              Difference]: Finished difference Result 11707 states and 19538 transitions.
[2023-11-28 23:44:34,365 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:34,367 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 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 3932
[2023-11-28 23:44:34,369 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:34,375 INFO  L225             Difference]: With dead ends: 11707
[2023-11-28 23:44:34,375 INFO  L226             Difference]: Without dead ends: 6086
[2023-11-28 23:44:34,381 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3931 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:34,382 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 12 mSDsluCounter, 19312 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28973 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 23:44:34,382 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28973 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:34,388 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6086 states.
[2023-11-28 23:44:34,441 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 6078.
[2023-11-28 23:44:34,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6078 states, 6077 states have (on average 1.6689155833470461) internal successors, (10142), 6077 states have internal predecessors, (10142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:34,455 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 10142 transitions.
[2023-11-28 23:44:34,456 INFO  L78                 Accepts]: Start accepts. Automaton has 6078 states and 10142 transitions. Word has length 3932
[2023-11-28 23:44:34,458 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:34,458 INFO  L495      AbstractCegarLoop]: Abstraction has 6078 states and 10142 transitions.
[2023-11-28 23:44:34,459 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:34,459 INFO  L276                IsEmpty]: Start isEmpty. Operand 6078 states and 10142 transitions.
[2023-11-28 23:44:34,529 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3933
[2023-11-28 23:44:34,529 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:34,531 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 23:44:34,571 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-28 23:44:34,732 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2023-11-28 23:44:34,732 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:34,732 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:34,733 INFO  L85        PathProgramCache]: Analyzing trace with hash -1948948092, now seen corresponding path program 1 times
[2023-11-28 23:44:34,734 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:34,734 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540893222]
[2023-11-28 23:44:34,734 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:34,734 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:35,000 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:35,000 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127539624]
[2023-11-28 23:44:35,001 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:35,001 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:35,001 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:35,002 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:35,003 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-28 23:44:38,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:38,640 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16296 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-28 23:44:38,684 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:38,799 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:38,800 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:44:38,800 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:38,800 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540893222]
[2023-11-28 23:44:38,800 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:38,800 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127539624]
[2023-11-28 23:44:38,800 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [127539624] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:44:38,800 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:44:38,801 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-28 23:44:38,802 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782115640]
[2023-11-28 23:44:38,802 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:38,806 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-28 23:44:38,807 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:38,811 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-28 23:44:38,811 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:38,813 INFO  L87              Difference]: Start difference. First operand 6078 states and 10142 transitions. Second operand  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:39,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:39,019 INFO  L93              Difference]: Finished difference Result 11709 states and 19540 transitions.
[2023-11-28 23:44:39,019 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-28 23:44:39,021 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 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 3932
[2023-11-28 23:44:39,025 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:39,036 INFO  L225             Difference]: With dead ends: 11709
[2023-11-28 23:44:39,036 INFO  L226             Difference]: Without dead ends: 6087
[2023-11-28 23:44:39,043 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3931 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-28 23:44:39,044 INFO  L413           NwaCegarLoop]: 9661 mSDtfsCounter, 12 mSDsluCounter, 19312 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28973 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 23:44:39,044 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28973 Invalid, 17 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-28 23:44:39,053 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6087 states.
[2023-11-28 23:44:39,123 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 6079.
[2023-11-28 23:44:39,131 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6079 states, 6078 states have (on average 1.6688055281342546) internal successors, (10143), 6078 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:39,141 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 10143 transitions.
[2023-11-28 23:44:39,141 INFO  L78                 Accepts]: Start accepts. Automaton has 6079 states and 10143 transitions. Word has length 3932
[2023-11-28 23:44:39,145 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:39,145 INFO  L495      AbstractCegarLoop]: Abstraction has 6079 states and 10143 transitions.
[2023-11-28 23:44:39,146 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:39,146 INFO  L276                IsEmpty]: Start isEmpty. Operand 6079 states and 10143 transitions.
[2023-11-28 23:44:39,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3933
[2023-11-28 23:44:39,255 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:39,258 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:39,308 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-11-28 23:44:39,472 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-11-28 23:44:39,473 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:39,473 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:39,474 INFO  L85        PathProgramCache]: Analyzing trace with hash -1862233482, now seen corresponding path program 1 times
[2023-11-28 23:44:39,475 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:39,475 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326044426]
[2023-11-28 23:44:39,475 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:39,475 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:39,738 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:39,738 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486934361]
[2023-11-28 23:44:39,739 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:39,740 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:39,740 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:39,741 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:39,742 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-28 23:44:43,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:43,364 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16297 conjuncts, 15 conjunts are in the unsatisfiable core
[2023-11-28 23:44:43,431 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:44:45,861 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:44:45,862 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:44:45,985 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked.
[2023-11-28 23:44:45,985 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:44:45,985 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326044426]
[2023-11-28 23:44:45,985 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:44:45,985 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486934361]
[2023-11-28 23:44:45,985 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486934361] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-28 23:44:45,985 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-28 23:44:45,988 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10
[2023-11-28 23:44:45,988 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719598308]
[2023-11-28 23:44:45,989 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:44:45,993 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-28 23:44:45,993 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:44:45,996 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-28 23:44:45,996 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2023-11-28 23:44:45,998 INFO  L87              Difference]: Start difference. First operand 6079 states and 10143 transitions. Second operand  has 5 states, 5 states have (on average 749.2) internal successors, (3746), 5 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:51,652 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:44:51,652 INFO  L93              Difference]: Finished difference Result 22489 states and 37389 transitions.
[2023-11-28 23:44:51,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-28 23:44:51,654 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 749.2) internal successors, (3746), 5 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3932
[2023-11-28 23:44:51,661 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:44:51,680 INFO  L225             Difference]: With dead ends: 22489
[2023-11-28 23:44:51,680 INFO  L226             Difference]: Without dead ends: 11690
[2023-11-28 23:44:51,690 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7863 GetRequests, 7854 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2023-11-28 23:44:51,691 INFO  L413           NwaCegarLoop]: 15958 mSDtfsCounter, 25427 mSDsluCounter, 15549 mSDsCounter, 0 mSdLazyCounter, 6449 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25427 SdHoareTripleChecker+Valid, 31507 SdHoareTripleChecker+Invalid, 6891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 6449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time
[2023-11-28 23:44:51,691 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25427 Valid, 31507 Invalid, 6891 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [442 Valid, 6449 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time]
[2023-11-28 23:44:51,705 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11690 states.
[2023-11-28 23:44:51,804 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11690 to 6079.
[2023-11-28 23:44:51,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6079 states, 6078 states have (on average 1.6688055281342546) internal successors, (10143), 6078 states have internal predecessors, (10143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:51,822 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 10143 transitions.
[2023-11-28 23:44:51,822 INFO  L78                 Accepts]: Start accepts. Automaton has 6079 states and 10143 transitions. Word has length 3932
[2023-11-28 23:44:51,833 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:44:51,833 INFO  L495      AbstractCegarLoop]: Abstraction has 6079 states and 10143 transitions.
[2023-11-28 23:44:51,834 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 749.2) internal successors, (3746), 5 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:44:51,834 INFO  L276                IsEmpty]: Start isEmpty. Operand 6079 states and 10143 transitions.
[2023-11-28 23:44:52,045 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3934
[2023-11-28 23:44:52,046 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:44:52,048 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 23:44:52,103 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-11-28 23:44:52,264 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2023-11-28 23:44:52,265 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:44:52,267 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:44:52,268 INFO  L85        PathProgramCache]: Analyzing trace with hash -2005367770, now seen corresponding path program 1 times
[2023-11-28 23:44:52,268 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:44:52,268 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798175304]
[2023-11-28 23:44:52,269 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:52,269 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:44:52,550 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:44:52,550 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353563471]
[2023-11-28 23:44:52,551 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:44:52,552 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:44:52,552 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:44:52,553 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:44:52,554 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-11-28 23:44:56,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:44:56,212 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16300 conjuncts, 39 conjunts are in the unsatisfiable core
[2023-11-28 23:44:56,273 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:45:12,094 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 8 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:45:12,094 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:45:28,610 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 180 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:45:28,610 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:45:28,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798175304]
[2023-11-28 23:45:28,611 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:45:28,611 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353563471]
[2023-11-28 23:45:28,611 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [353563471] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-28 23:45:28,611 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-28 23:45:28,613 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 30
[2023-11-28 23:45:28,613 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805228469]
[2023-11-28 23:45:28,613 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-28 23:45:28,619 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 30 states
[2023-11-28 23:45:28,619 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:45:28,627 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants.
[2023-11-28 23:45:28,628 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870
[2023-11-28 23:45:28,630 INFO  L87              Difference]: Start difference. First operand 6079 states and 10143 transitions. Second operand  has 30 states, 30 states have (on average 261.8666666666667) internal successors, (7856), 30 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:07,590 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:47:07,591 INFO  L93              Difference]: Finished difference Result 222046 states and 369078 transitions.
[2023-11-28 23:47:07,591 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. 
[2023-11-28 23:47:07,592 INFO  L78                 Accepts]: Start accepts. Automaton has  has 30 states, 30 states have (on average 261.8666666666667) internal successors, (7856), 30 states have internal predecessors, (7856), 0 states have call successors, (0), 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 3933
[2023-11-28 23:47:07,597 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:47:07,715 INFO  L225             Difference]: With dead ends: 222046
[2023-11-28 23:47:07,716 INFO  L226             Difference]: Without dead ends: 167544
[2023-11-28 23:47:07,764 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8199 GetRequests, 7909 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34999 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=11822, Invalid=73150, Unknown=0, NotChecked=0, Total=84972
[2023-11-28 23:47:07,765 INFO  L413           NwaCegarLoop]: 47563 mSDtfsCounter, 809389 mSDsluCounter, 706453 mSDsCounter, 0 mSdLazyCounter, 81953 mSolverCounterSat, 1681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809389 SdHoareTripleChecker+Valid, 754016 SdHoareTripleChecker+Invalid, 83634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.0s SdHoareTripleChecker+Time, 1681 IncrementalHoareTripleChecker+Valid, 81953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.6s IncrementalHoareTripleChecker+Time
[2023-11-28 23:47:07,765 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [809389 Valid, 754016 Invalid, 83634 Unknown, 0 Unchecked, 3.0s Time], IncrementalHoareTripleChecker [1681 Valid, 81953 Invalid, 0 Unknown, 0 Unchecked, 54.6s Time]
[2023-11-28 23:47:08,031 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 167544 states.
[2023-11-28 23:47:08,855 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 167544 to 12661.
[2023-11-28 23:47:08,868 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12661 states, 12660 states have (on average 1.6692733017377568) internal successors, (21133), 12660 states have internal predecessors, (21133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:08,890 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12661 states to 12661 states and 21133 transitions.
[2023-11-28 23:47:08,890 INFO  L78                 Accepts]: Start accepts. Automaton has 12661 states and 21133 transitions. Word has length 3933
[2023-11-28 23:47:08,893 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:47:08,893 INFO  L495      AbstractCegarLoop]: Abstraction has 12661 states and 21133 transitions.
[2023-11-28 23:47:08,895 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 30 states, 30 states have (on average 261.8666666666667) internal successors, (7856), 30 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:08,895 INFO  L276                IsEmpty]: Start isEmpty. Operand 12661 states and 21133 transitions.
[2023-11-28 23:47:09,019 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3935
[2023-11-28 23:47:09,019 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:47:09,021 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:09,067 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2023-11-28 23:47:09,222 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:47:09,222 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:47:09,223 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:47:09,224 INFO  L85        PathProgramCache]: Analyzing trace with hash -551408628, now seen corresponding path program 1 times
[2023-11-28 23:47:09,224 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:47:09,224 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630596265]
[2023-11-28 23:47:09,225 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:47:09,225 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:47:09,480 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:47:09,480 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472216321]
[2023-11-28 23:47:09,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:47:09,481 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:47:09,482 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:47:09,483 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:47:09,484 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-11-28 23:47:13,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:47:13,178 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16303 conjuncts, 36 conjunts are in the unsatisfiable core
[2023-11-28 23:47:13,229 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:47:16,372 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:47:16,373 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:47:16,373 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:47:16,373 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630596265]
[2023-11-28 23:47:16,373 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:47:16,373 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472216321]
[2023-11-28 23:47:16,373 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [472216321] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:47:16,373 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:47:16,374 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2023-11-28 23:47:16,374 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569527640]
[2023-11-28 23:47:16,374 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:47:16,377 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-11-28 23:47:16,377 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:47:16,380 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-11-28 23:47:16,380 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2023-11-28 23:47:16,381 INFO  L87              Difference]: Start difference. First operand 12661 states and 21133 transitions. Second operand  has 15 states, 15 states have (on average 262.26666666666665) internal successors, (3934), 14 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:19,073 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:47:19,073 INFO  L93              Difference]: Finished difference Result 71318 states and 119025 transitions.
[2023-11-28 23:47:19,073 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2023-11-28 23:47:19,074 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 262.26666666666665) internal successors, (3934), 14 states have internal predecessors, (3934), 0 states have call successors, (0), 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 3934
[2023-11-28 23:47:19,075 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:47:19,119 INFO  L225             Difference]: With dead ends: 71318
[2023-11-28 23:47:19,119 INFO  L226             Difference]: Without dead ends: 58835
[2023-11-28 23:47:19,134 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3958 GetRequests, 3920 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560
[2023-11-28 23:47:19,134 INFO  L413           NwaCegarLoop]: 11199 mSDtfsCounter, 135984 mSDsluCounter, 138845 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135984 SdHoareTripleChecker+Valid, 150044 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-11-28 23:47:19,135 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [135984 Valid, 150044 Invalid, 756 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [9 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-11-28 23:47:19,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58835 states.
[2023-11-28 23:47:19,480 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58835 to 13594.
[2023-11-28 23:47:19,493 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13594 states, 13593 states have (on average 1.6694622232031193) internal successors, (22693), 13593 states have internal predecessors, (22693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:19,514 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13594 states to 13594 states and 22693 transitions.
[2023-11-28 23:47:19,514 INFO  L78                 Accepts]: Start accepts. Automaton has 13594 states and 22693 transitions. Word has length 3934
[2023-11-28 23:47:19,516 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:47:19,516 INFO  L495      AbstractCegarLoop]: Abstraction has 13594 states and 22693 transitions.
[2023-11-28 23:47:19,517 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 262.26666666666665) internal successors, (3934), 14 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:19,517 INFO  L276                IsEmpty]: Start isEmpty. Operand 13594 states and 22693 transitions.
[2023-11-28 23:47:19,600 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3935
[2023-11-28 23:47:19,600 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:47:19,602 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 23:47:19,647 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2023-11-28 23:47:19,803 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2023-11-28 23:47:19,803 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:47:19,803 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:47:19,805 INFO  L85        PathProgramCache]: Analyzing trace with hash -1491257672, now seen corresponding path program 1 times
[2023-11-28 23:47:19,805 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:47:19,805 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595566407]
[2023-11-28 23:47:19,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:47:19,805 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:47:20,059 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:47:20,059 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262328691]
[2023-11-28 23:47:20,060 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:47:20,060 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:47:20,061 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:47:20,061 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:47:20,062 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-11-28 23:47:23,546 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:47:23,642 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16304 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-11-28 23:47:23,687 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:47:23,764 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:47:23,764 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:47:23,764 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:47:23,764 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595566407]
[2023-11-28 23:47:23,764 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:47:23,764 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262328691]
[2023-11-28 23:47:23,764 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262328691] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:47:23,765 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:47:23,765 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-11-28 23:47:23,766 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601788566]
[2023-11-28 23:47:23,766 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:47:23,768 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-28 23:47:23,769 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:47:23,771 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-28 23:47:23,771 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-11-28 23:47:23,772 INFO  L87              Difference]: Start difference. First operand 13594 states and 22693 transitions. Second operand  has 6 states, 6 states have (on average 655.6666666666666) internal successors, (3934), 6 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:24,111 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:47:24,111 INFO  L93              Difference]: Finished difference Result 40422 states and 67467 transitions.
[2023-11-28 23:47:24,112 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-11-28 23:47:24,113 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 655.6666666666666) internal successors, (3934), 6 states have internal predecessors, (3934), 0 states have call successors, (0), 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 3934
[2023-11-28 23:47:24,113 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:47:24,131 INFO  L225             Difference]: With dead ends: 40422
[2023-11-28 23:47:24,131 INFO  L226             Difference]: Without dead ends: 27006
[2023-11-28 23:47:24,141 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3936 GetRequests, 3930 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-11-28 23:47:24,141 INFO  L413           NwaCegarLoop]: 10399 mSDtfsCounter, 9360 mSDsluCounter, 40824 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9360 SdHoareTripleChecker+Valid, 51223 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-28 23:47:24,142 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [9360 Valid, 51223 Invalid, 64 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-28 23:47:24,160 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27006 states.
[2023-11-28 23:47:24,314 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27006 to 13614.
[2023-11-28 23:47:24,326 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13614 states, 13613 states have (on average 1.668478660104312) internal successors, (22713), 13613 states have internal predecessors, (22713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:24,340 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13614 states to 13614 states and 22713 transitions.
[2023-11-28 23:47:24,341 INFO  L78                 Accepts]: Start accepts. Automaton has 13614 states and 22713 transitions. Word has length 3934
[2023-11-28 23:47:24,342 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:47:24,342 INFO  L495      AbstractCegarLoop]: Abstraction has 13614 states and 22713 transitions.
[2023-11-28 23:47:24,342 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 655.6666666666666) internal successors, (3934), 6 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:47:24,343 INFO  L276                IsEmpty]: Start isEmpty. Operand 13614 states and 22713 transitions.
[2023-11-28 23:47:24,470 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3935
[2023-11-28 23:47:24,470 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:47:24,472 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:24,524 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0
[2023-11-28 23:47:24,672 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2023-11-28 23:47:24,673 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:47:24,673 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:47:24,674 INFO  L85        PathProgramCache]: Analyzing trace with hash -963019782, now seen corresponding path program 1 times
[2023-11-28 23:47:24,674 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:47:24,674 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134309683]
[2023-11-28 23:47:24,675 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:47:24,675 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:47:24,921 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:47:24,921 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228734954]
[2023-11-28 23:47:24,923 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:47:24,923 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:47:24,923 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:47:24,924 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:47:24,928 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2023-11-28 23:47:28,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:47:28,552 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16304 conjuncts, 46 conjunts are in the unsatisfiable core
[2023-11-28 23:47:28,609 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:47:49,490 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 8 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:47:49,490 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:47:58,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 180 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:47:58,672 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:47:58,672 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134309683]
[2023-11-28 23:47:58,672 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:47:58,672 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228734954]
[2023-11-28 23:47:58,673 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [228734954] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-28 23:47:58,673 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-28 23:47:58,675 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35
[2023-11-28 23:47:58,675 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438482687]
[2023-11-28 23:47:58,675 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-28 23:47:58,681 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 35 states
[2023-11-28 23:47:58,682 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:47:58,687 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2023-11-28 23:47:58,687 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190
[2023-11-28 23:47:58,689 INFO  L87              Difference]: Start difference. First operand 13614 states and 22713 transitions. Second operand  has 35 states, 35 states have (on average 224.42857142857142) internal successors, (7855), 35 states have internal predecessors, (7855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:01,700 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:01,700 INFO  L93              Difference]: Finished difference Result 693717 states and 1153206 transitions.
[2023-11-28 23:53:01,701 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 575 states. 
[2023-11-28 23:53:01,702 INFO  L78                 Accepts]: Start accepts. Automaton has  has 35 states, 35 states have (on average 224.42857142857142) internal successors, (7855), 35 states have internal predecessors, (7855), 0 states have call successors, (0), 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 3934
[2023-11-28 23:53:01,705 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:02,165 INFO  L225             Difference]: With dead ends: 693717
[2023-11-28 23:53:02,165 INFO  L226             Difference]: Without dead ends: 680281
[2023-11-28 23:53:02,273 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8615 GetRequests, 8019 SyntacticMatches, 0 SemanticMatches, 596 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165620 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=37706, Invalid=319300, Unknown=0, NotChecked=0, Total=357006
[2023-11-28 23:53:02,274 INFO  L413           NwaCegarLoop]: 54610 mSDtfsCounter, 1108364 mSDsluCounter, 1228771 mSDsCounter, 0 mSdLazyCounter, 141740 mSolverCounterSat, 1774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108364 SdHoareTripleChecker+Valid, 1283381 SdHoareTripleChecker+Invalid, 143514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.6s SdHoareTripleChecker+Time, 1774 IncrementalHoareTripleChecker+Valid, 141740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.4s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:02,274 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1108364 Valid, 1283381 Invalid, 143514 Unknown, 0 Unchecked, 5.6s Time], IncrementalHoareTripleChecker [1774 Valid, 141740 Invalid, 0 Unknown, 0 Unchecked, 131.4s Time]
[2023-11-28 23:53:02,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 680281 states.
[2023-11-28 23:53:05,038 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 680281 to 19857.
[2023-11-28 23:53:05,053 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19857 states, 19856 states have (on average 1.6685132957292506) internal successors, (33130), 19856 states have internal predecessors, (33130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:05,074 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19857 states to 19857 states and 33130 transitions.
[2023-11-28 23:53:05,074 INFO  L78                 Accepts]: Start accepts. Automaton has 19857 states and 33130 transitions. Word has length 3934
[2023-11-28 23:53:05,076 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:05,076 INFO  L495      AbstractCegarLoop]: Abstraction has 19857 states and 33130 transitions.
[2023-11-28 23:53:05,078 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 35 states, 35 states have (on average 224.42857142857142) internal successors, (7855), 35 states have internal predecessors, (7855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:05,078 INFO  L276                IsEmpty]: Start isEmpty. Operand 19857 states and 33130 transitions.
[2023-11-28 23:53:05,235 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3936
[2023-11-28 23:53:05,235 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:05,237 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-11-28 23:53:05,288 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2023-11-28 23:53:05,438 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-11-28 23:53:05,438 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:05,438 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:05,440 INFO  L85        PathProgramCache]: Analyzing trace with hash -944603996, now seen corresponding path program 1 times
[2023-11-28 23:53:05,440 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:05,440 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748681631]
[2023-11-28 23:53:05,441 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:05,441 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:05,723 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:05,723 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353912323]
[2023-11-28 23:53:05,724 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:05,724 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:05,725 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:05,725 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:05,736 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2023-11-28 23:53:09,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:09,278 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16306 conjuncts, 24 conjunts are in the unsatisfiable core
[2023-11-28 23:53:09,335 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:11,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:53:11,601 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:11,601 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:11,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748681631]
[2023-11-28 23:53:11,601 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:11,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353912323]
[2023-11-28 23:53:11,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353912323] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:11,602 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:11,603 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-11-28 23:53:11,603 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742166952]
[2023-11-28 23:53:11,603 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:11,606 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2023-11-28 23:53:11,606 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:11,609 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2023-11-28 23:53:11,609 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2023-11-28 23:53:11,610 INFO  L87              Difference]: Start difference. First operand 19857 states and 33130 transitions. Second operand  has 10 states, 10 states have (on average 393.5) internal successors, (3935), 9 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:12,780 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:12,780 INFO  L93              Difference]: Finished difference Result 93700 states and 156328 transitions.
[2023-11-28 23:53:12,781 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-11-28 23:53:12,782 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 393.5) internal successors, (3935), 9 states have internal predecessors, (3935), 0 states have call successors, (0), 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 3935
[2023-11-28 23:53:12,782 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:12,828 INFO  L225             Difference]: With dead ends: 93700
[2023-11-28 23:53:12,829 INFO  L226             Difference]: Without dead ends: 74021
[2023-11-28 23:53:12,846 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3942 GetRequests, 3926 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306
[2023-11-28 23:53:12,847 INFO  L413           NwaCegarLoop]: 11176 mSDtfsCounter, 73010 mSDsluCounter, 76071 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73010 SdHoareTripleChecker+Valid, 87247 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:12,847 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [73010 Valid, 87247 Invalid, 249 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-11-28 23:53:12,891 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 74021 states.
[2023-11-28 23:53:13,318 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 74021 to 24761.
[2023-11-28 23:53:13,336 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 24761 states, 24760 states have (on average 1.668739903069467) internal successors, (41318), 24760 states have internal predecessors, (41318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:13,362 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24761 states to 24761 states and 41318 transitions.
[2023-11-28 23:53:13,362 INFO  L78                 Accepts]: Start accepts. Automaton has 24761 states and 41318 transitions. Word has length 3935
[2023-11-28 23:53:13,362 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:13,363 INFO  L495      AbstractCegarLoop]: Abstraction has 24761 states and 41318 transitions.
[2023-11-28 23:53:13,363 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 393.5) internal successors, (3935), 9 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:13,363 INFO  L276                IsEmpty]: Start isEmpty. Operand 24761 states and 41318 transitions.
[2023-11-28 23:53:13,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3936
[2023-11-28 23:53:13,455 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:13,457 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:53:13,498 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2023-11-28 23:53:13,657 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-11-28 23:53:13,658 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:13,658 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:13,659 INFO  L85        PathProgramCache]: Analyzing trace with hash 1046105166, now seen corresponding path program 1 times
[2023-11-28 23:53:13,659 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:13,659 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238938793]
[2023-11-28 23:53:13,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:13,660 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:13,962 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:13,962 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030569904]
[2023-11-28 23:53:13,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:13,963 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:13,963 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:13,964 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:13,965 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2023-11-28 23:53:17,769 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:17,872 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16306 conjuncts, 36 conjunts are in the unsatisfiable core
[2023-11-28 23:53:18,014 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:21,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:53:21,291 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-28 23:53:21,292 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:53:21,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238938793]
[2023-11-28 23:53:21,292 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:53:21,292 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030569904]
[2023-11-28 23:53:21,292 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030569904] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-28 23:53:21,292 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-28 23:53:21,293 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2023-11-28 23:53:21,294 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875331857]
[2023-11-28 23:53:21,294 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-28 23:53:21,298 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-11-28 23:53:21,298 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:53:21,301 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-11-28 23:53:21,301 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2023-11-28 23:53:21,302 INFO  L87              Difference]: Start difference. First operand 24761 states and 41318 transitions. Second operand  has 15 states, 15 states have (on average 262.3333333333333) internal successors, (3935), 14 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:24,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-28 23:53:24,396 INFO  L93              Difference]: Finished difference Result 150354 states and 250854 transitions.
[2023-11-28 23:53:24,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2023-11-28 23:53:24,397 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 15 states have (on average 262.3333333333333) internal successors, (3935), 14 states have internal predecessors, (3935), 0 states have call successors, (0), 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 3935
[2023-11-28 23:53:24,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-28 23:53:24,467 INFO  L225             Difference]: With dead ends: 150354
[2023-11-28 23:53:24,467 INFO  L226             Difference]: Without dead ends: 125771
[2023-11-28 23:53:24,479 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3959 GetRequests, 3921 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560
[2023-11-28 23:53:24,479 INFO  L413           NwaCegarLoop]: 11197 mSDtfsCounter, 176695 mSDsluCounter, 147454 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176695 SdHoareTripleChecker+Valid, 158651 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.5s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-11-28 23:53:24,479 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [176695 Valid, 158651 Invalid, 821 Unknown, 0 Unchecked, 0.5s Time], IncrementalHoareTripleChecker [14 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-11-28 23:53:24,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 125771 states.
[2023-11-28 23:53:25,113 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 125771 to 31215.
[2023-11-28 23:53:25,138 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31215 states, 31214 states have (on average 1.6688665342474531) internal successors, (52092), 31214 states have internal predecessors, (52092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:25,193 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31215 states to 31215 states and 52092 transitions.
[2023-11-28 23:53:25,193 INFO  L78                 Accepts]: Start accepts. Automaton has 31215 states and 52092 transitions. Word has length 3935
[2023-11-28 23:53:25,194 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-28 23:53:25,194 INFO  L495      AbstractCegarLoop]: Abstraction has 31215 states and 52092 transitions.
[2023-11-28 23:53:25,195 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 15 states have (on average 262.3333333333333) internal successors, (3935), 14 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-28 23:53:25,195 INFO  L276                IsEmpty]: Start isEmpty. Operand 31215 states and 52092 transitions.
[2023-11-28 23:53:25,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3936
[2023-11-28 23:53:25,453 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-28 23:53:25,455 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:53:25,495 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0
[2023-11-28 23:53:25,655 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2023-11-28 23:53:25,655 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-28 23:53:25,656 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-28 23:53:25,657 INFO  L85        PathProgramCache]: Analyzing trace with hash -63344476, now seen corresponding path program 1 times
[2023-11-28 23:53:25,657 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-28 23:53:25,657 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153548706]
[2023-11-28 23:53:25,658 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:25,658 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-28 23:53:25,979 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-28 23:53:25,979 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580464465]
[2023-11-28 23:53:25,980 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-28 23:53:25,980 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-28 23:53:25,980 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3
[2023-11-28 23:53:25,981 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-28 23:53:25,982 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05f7096e-d841-4b0b-aad9-2f40deabd382/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2023-11-28 23:53:29,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-28 23:53:29,824 INFO  L262         TraceCheckSpWp]: Trace formula consists of 16307 conjuncts, 59 conjunts are in the unsatisfiable core
[2023-11-28 23:53:29,878 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-28 23:53:50,681 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:53:50,681 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-28 23:54:03,319 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 174 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-28 23:54:03,319 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-28 23:54:03,319 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153548706]
[2023-11-28 23:54:03,320 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-28 23:54:03,320 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580464465]
[2023-11-28 23:54:03,320 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [580464465] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-28 23:54:03,320 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-28 23:54:03,323 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 44
[2023-11-28 23:54:03,323 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535778035]
[2023-11-28 23:54:03,323 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-28 23:54:03,328 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 44 states
[2023-11-28 23:54:03,328 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-28 23:54:03,333 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants.
[2023-11-28 23:54:03,334 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892
[2023-11-28 23:54:03,335 INFO  L87              Difference]: Start difference. First operand 31215 states and 52092 transitions. Second operand  has 44 states, 44 states have (on average 178.70454545454547) internal successors, (7863), 44 states have internal predecessors, (7863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)