./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_5.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 527bcce2
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_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx --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 32bit --witnessprinter.graph.data.programhash 9442e044a28de8db50c4a8a0eb4a8445fbcad0aeea133121bbafc8536c8e355f
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-527bcce
[2023-11-21 21:00:37,336 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-21 21:00:37,429 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf
[2023-11-21 21:00:37,435 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-21 21:00:37,436 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-21 21:00:37,459 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-21 21:00:37,460 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-21 21:00:37,461 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-21 21:00:37,461 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2023-11-21 21:00:37,462 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2023-11-21 21:00:37,463 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-21 21:00:37,463 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-21 21:00:37,464 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-21 21:00:37,465 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-21 21:00:37,465 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-21 21:00:37,466 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-21 21:00:37,466 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-21 21:00:37,467 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-11-21 21:00:37,468 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-21 21:00:37,468 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-11-21 21:00:37,469 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-21 21:00:37,469 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-21 21:00:37,470 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-21 21:00:37,470 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-21 21:00:37,471 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-11-21 21:00:37,471 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-21 21:00:37,472 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-21 21:00:37,472 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-21 21:00:37,473 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-21 21:00:37,473 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-21 21:00:37,473 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-21 21:00:37,474 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 21:00:37,474 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-21 21:00:37,475 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-21 21:00:37,475 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-21 21:00:37,476 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-21 21:00:37,477 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-21 21:00:37,477 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-21 21:00:37,478 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-21 21:00:37,478 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-21 21:00:37,479 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-21 21:00:37,479 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-21 21:00:37,480 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_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/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_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx
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 -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9442e044a28de8db50c4a8a0eb4a8445fbcad0aeea133121bbafc8536c8e355f
[2023-11-21 21:00:37,815 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-21 21:00:37,845 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-21 21:00:37,848 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-21 21:00:37,850 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-21 21:00:37,850 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-21 21:00:37,852 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/array-programs/partial_mod_count_5.c
[2023-11-21 21:00:40,963 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-21 21:00:41,208 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-21 21:00:41,210 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/sv-benchmarks/c/array-programs/partial_mod_count_5.c
[2023-11-21 21:00:41,219 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/data/0e8e95b25/8cb4d4a294e5415ea63602f0ba114a88/FLAG3a97a5c83
[2023-11-21 21:00:41,236 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/data/0e8e95b25/8cb4d4a294e5415ea63602f0ba114a88
[2023-11-21 21:00:41,243 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-21 21:00:41,245 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-21 21:00:41,249 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-21 21:00:41,250 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-21 21:00:41,255 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-21 21:00:41,256 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,257 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39065c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41, skipping insertion in model container
[2023-11-21 21:00:41,257 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,281 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-21 21:00:41,475 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_72d9e564-66ee-4478-b8c1-b1cdd4f37690/sv-benchmarks/c/array-programs/partial_mod_count_5.c[323,336]
[2023-11-21 21:00:41,497 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-21 21:00:41,506 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-21 21:00:41,519 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_72d9e564-66ee-4478-b8c1-b1cdd4f37690/sv-benchmarks/c/array-programs/partial_mod_count_5.c[323,336]
[2023-11-21 21:00:41,526 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-21 21:00:41,542 INFO  L206         MainTranslator]: Completed translation
[2023-11-21 21:00:41,543 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41 WrapperNode
[2023-11-21 21:00:41,543 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-21 21:00:41,545 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-21 21:00:41,545 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-21 21:00:41,545 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-21 21:00:41,554 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,561 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,583 INFO  L138                Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52
[2023-11-21 21:00:41,583 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-21 21:00:41,584 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-21 21:00:41,584 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-21 21:00:41,585 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-21 21:00:41,596 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,597 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,599 INFO  L184        PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,609 INFO  L187           HeapSplitter]: Split 5 memory accesses to 2 slices as follows [2, 3]
[2023-11-21 21:00:41,610 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,610 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,615 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,619 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,621 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,622 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,624 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-21 21:00:41,625 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-21 21:00:41,626 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-21 21:00:41,626 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-21 21:00:41,627 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (1/1) ...
[2023-11-21 21:00:41,633 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-21 21:00:41,650 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:41,663 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-21 21:00:41,690 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-21 21:00:41,718 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-21 21:00:41,718 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2023-11-21 21:00:41,718 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#1
[2023-11-21 21:00:41,719 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2023-11-21 21:00:41,719 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int#0
[2023-11-21 21:00:41,719 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int#1
[2023-11-21 21:00:41,719 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-21 21:00:41,722 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-21 21:00:41,722 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int#0
[2023-11-21 21:00:41,723 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int#1
[2023-11-21 21:00:41,723 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-11-21 21:00:41,827 INFO  L240             CfgBuilder]: Building ICFG
[2023-11-21 21:00:41,830 INFO  L266             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-21 21:00:41,990 INFO  L281             CfgBuilder]: Performing block encoding
[2023-11-21 21:00:42,085 INFO  L303             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-21 21:00:42,091 INFO  L308             CfgBuilder]: Removed 2 assume(true) statements.
[2023-11-21 21:00:42,094 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:42 BoogieIcfgContainer
[2023-11-21 21:00:42,094 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-21 21:00:42,097 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-21 21:00:42,098 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-21 21:00:42,101 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-21 21:00:42,101 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:00:41" (1/3) ...
[2023-11-21 21:00:42,102 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117f60c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:42, skipping insertion in model container
[2023-11-21 21:00:42,103 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:00:41" (2/3) ...
[2023-11-21 21:00:42,103 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117f60c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:00:42, skipping insertion in model container
[2023-11-21 21:00:42,103 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:00:42" (3/3) ...
[2023-11-21 21:00:42,105 INFO  L112   eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c
[2023-11-21 21:00:42,126 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-21 21:00:42,126 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-21 21:00:42,184 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-21 21:00:42,191 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;@18b44216, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-21 21:00:42,192 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-21 21:00:42,197 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,203 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2023-11-21 21:00:42,204 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:42,204 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2023-11-21 21:00:42,205 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:42,211 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:42,212 INFO  L85        PathProgramCache]: Analyzing trace with hash 84220407, now seen corresponding path program 1 times
[2023-11-21 21:00:42,221 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:42,222 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131922864]
[2023-11-21 21:00:42,222 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:42,223 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:42,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 21:00:42,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 21:00:42,516 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:42,517 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131922864]
[2023-11-21 21:00:42,518 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131922864] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 21:00:42,518 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 21:00:42,518 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2023-11-21 21:00:42,520 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624888989]
[2023-11-21 21:00:42,521 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 21:00:42,525 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-11-21 21:00:42,526 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:42,556 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-11-21 21:00:42,557 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 21:00:42,559 INFO  L87              Difference]: Start difference. First operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,602 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:42,602 INFO  L93              Difference]: Finished difference Result 15 states and 19 transitions.
[2023-11-21 21:00:42,605 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-11-21 21:00:42,606 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5
[2023-11-21 21:00:42,607 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:42,615 INFO  L225             Difference]: With dead ends: 15
[2023-11-21 21:00:42,624 INFO  L226             Difference]: Without dead ends: 8
[2023-11-21 21:00:42,627 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-11-21 21:00:42,631 INFO  L413           NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:42,635 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 21:00:42,658 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8 states.
[2023-11-21 21:00:42,671 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8.
[2023-11-21 21:00:42,672 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,673 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions.
[2023-11-21 21:00:42,695 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5
[2023-11-21 21:00:42,696 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:42,696 INFO  L495      AbstractCegarLoop]: Abstraction has 8 states and 9 transitions.
[2023-11-21 21:00:42,697 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,697 INFO  L276                IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions.
[2023-11-21 21:00:42,697 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2023-11-21 21:00:42,698 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:42,698 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2023-11-21 21:00:42,698 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-21 21:00:42,699 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:42,700 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:42,700 INFO  L85        PathProgramCache]: Analyzing trace with hash -1681222870, now seen corresponding path program 1 times
[2023-11-21 21:00:42,701 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:42,702 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359451662]
[2023-11-21 21:00:42,702 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:42,704 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:42,761 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:42,762 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922993492]
[2023-11-21 21:00:42,762 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:42,762 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:42,762 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:42,766 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:42,769 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-21 21:00:42,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 21:00:42,838 INFO  L262         TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-11-21 21:00:42,843 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 21:00:42,904 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 21:00:42,904 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 21:00:42,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-21 21:00:42,943 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:42,943 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359451662]
[2023-11-21 21:00:42,944 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-21 21:00:42,944 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922993492]
[2023-11-21 21:00:42,944 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922993492] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 21:00:42,945 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 21:00:42,945 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5
[2023-11-21 21:00:42,946 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055101420]
[2023-11-21 21:00:42,946 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 21:00:42,947 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-21 21:00:42,947 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:42,948 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-21 21:00:42,949 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2023-11-21 21:00:42,949 INFO  L87              Difference]: Start difference. First operand 8 states and 9 transitions. Second operand  has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:42,984 INFO  L93              Difference]: Finished difference Result 16 states and 20 transitions.
[2023-11-21 21:00:42,984 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-21 21:00:42,985 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 6
[2023-11-21 21:00:42,985 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:42,985 INFO  L225             Difference]: With dead ends: 16
[2023-11-21 21:00:42,985 INFO  L226             Difference]: Without dead ends: 11
[2023-11-21 21:00:42,986 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2023-11-21 21:00:42,988 INFO  L413           NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:42,989 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 21:00:42,990 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2023-11-21 21:00:42,992 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2023-11-21 21:00:42,993 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,994 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions.
[2023-11-21 21:00:42,994 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6
[2023-11-21 21:00:42,994 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:42,994 INFO  L495      AbstractCegarLoop]: Abstraction has 11 states and 12 transitions.
[2023-11-21 21:00:42,995 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:42,995 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions.
[2023-11-21 21:00:42,996 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2023-11-21 21:00:42,996 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:42,996 INFO  L195           NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1]
[2023-11-21 21:00:43,019 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-21 21:00:43,208 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:43,209 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:43,210 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:43,210 INFO  L85        PathProgramCache]: Analyzing trace with hash 1194544823, now seen corresponding path program 2 times
[2023-11-21 21:00:43,210 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:43,210 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048539320]
[2023-11-21 21:00:43,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:43,211 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:43,257 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:43,266 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329513153]
[2023-11-21 21:00:43,267 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-21 21:00:43,268 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:43,269 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:43,273 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:43,279 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-21 21:00:43,374 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s)
[2023-11-21 21:00:43,375 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-21 21:00:43,377 INFO  L262         TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-11-21 21:00:43,379 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 21:00:43,689 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21
[2023-11-21 21:00:43,793 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-11-21 21:00:43,794 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-21 21:00:43,794 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:43,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048539320]
[2023-11-21 21:00:43,794 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-21 21:00:43,794 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329513153]
[2023-11-21 21:00:43,795 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [329513153] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-21 21:00:43,795 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-21 21:00:43,795 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-11-21 21:00:43,795 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656191949]
[2023-11-21 21:00:43,796 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-21 21:00:43,796 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-21 21:00:43,796 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:43,798 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-21 21:00:43,798 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-21 21:00:43,798 INFO  L87              Difference]: Start difference. First operand 11 states and 12 transitions. Second operand  has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:43,826 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:43,826 INFO  L93              Difference]: Finished difference Result 16 states and 17 transitions.
[2023-11-21 21:00:43,827 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-21 21:00:43,827 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 9
[2023-11-21 21:00:43,827 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:43,828 INFO  L225             Difference]: With dead ends: 16
[2023-11-21 21:00:43,828 INFO  L226             Difference]: Without dead ends: 14
[2023-11-21 21:00:43,828 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-21 21:00:43,832 INFO  L413           NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:43,832 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 21:00:43,833 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2023-11-21 21:00:43,836 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13.
[2023-11-21 21:00:43,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:43,837 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2023-11-21 21:00:43,837 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2023-11-21 21:00:43,837 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:43,838 INFO  L495      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2023-11-21 21:00:43,838 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:43,838 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2023-11-21 21:00:43,839 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2023-11-21 21:00:43,839 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:43,839 INFO  L195           NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1]
[2023-11-21 21:00:43,863 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-11-21 21:00:44,056 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:44,057 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:44,057 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:44,057 INFO  L85        PathProgramCache]: Analyzing trace with hash -1409067361, now seen corresponding path program 1 times
[2023-11-21 21:00:44,057 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:44,058 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411205089]
[2023-11-21 21:00:44,058 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:44,058 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:44,081 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:44,081 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251636583]
[2023-11-21 21:00:44,081 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:44,082 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:44,082 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:44,093 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:44,094 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-21 21:00:44,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-21 21:00:44,172 INFO  L262         TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core
[2023-11-21 21:00:44,173 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 21:00:44,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 21:00:44,250 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 21:00:44,325 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 21:00:44,325 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:44,326 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411205089]
[2023-11-21 21:00:44,326 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-21 21:00:44,326 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251636583]
[2023-11-21 21:00:44,326 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251636583] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 21:00:44,326 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 21:00:44,327 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11
[2023-11-21 21:00:44,327 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553966624]
[2023-11-21 21:00:44,327 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 21:00:44,327 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2023-11-21 21:00:44,328 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:44,329 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2023-11-21 21:00:44,329 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2023-11-21 21:00:44,330 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:44,388 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:44,389 INFO  L93              Difference]: Finished difference Result 26 states and 33 transitions.
[2023-11-21 21:00:44,390 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2023-11-21 21:00:44,391 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 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 12
[2023-11-21 21:00:44,391 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:44,393 INFO  L225             Difference]: With dead ends: 26
[2023-11-21 21:00:44,393 INFO  L226             Difference]: Without dead ends: 19
[2023-11-21 21:00:44,394 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2023-11-21 21:00:44,399 INFO  L413           NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:44,400 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 21:00:44,403 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2023-11-21 21:00:44,411 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2023-11-21 21:00:44,411 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:44,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2023-11-21 21:00:44,413 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12
[2023-11-21 21:00:44,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:44,414 INFO  L495      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2023-11-21 21:00:44,414 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:44,415 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2023-11-21 21:00:44,415 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2023-11-21 21:00:44,416 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:44,416 INFO  L195           NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1]
[2023-11-21 21:00:44,442 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-11-21 21:00:44,636 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:44,637 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:44,637 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:44,637 INFO  L85        PathProgramCache]: Analyzing trace with hash 1429170047, now seen corresponding path program 2 times
[2023-11-21 21:00:44,637 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:44,638 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961135296]
[2023-11-21 21:00:44,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:44,638 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:44,671 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:44,671 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766750879]
[2023-11-21 21:00:44,671 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-11-21 21:00:44,671 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:44,671 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:44,672 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:44,692 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-11-21 21:00:44,779 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-11-21 21:00:44,779 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-21 21:00:44,781 INFO  L262         TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core
[2023-11-21 21:00:44,783 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 21:00:44,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 21:00:44,957 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 21:00:45,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-11-21 21:00:45,249 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:45,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961135296]
[2023-11-21 21:00:45,250 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-21 21:00:45,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766750879]
[2023-11-21 21:00:45,250 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [766750879] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 21:00:45,250 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 21:00:45,250 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23
[2023-11-21 21:00:45,250 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578340963]
[2023-11-21 21:00:45,251 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 21:00:45,251 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2023-11-21 21:00:45,251 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:45,252 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2023-11-21 21:00:45,253 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552
[2023-11-21 21:00:45,253 INFO  L87              Difference]: Start difference. First operand 19 states and 20 transitions. Second operand  has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:45,344 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:45,345 INFO  L93              Difference]: Finished difference Result 38 states and 51 transitions.
[2023-11-21 21:00:45,345 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2023-11-21 21:00:45,345 INFO  L78                 Accepts]: Start accepts. Automaton has  has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 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 18
[2023-11-21 21:00:45,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:45,348 INFO  L225             Difference]: With dead ends: 38
[2023-11-21 21:00:45,349 INFO  L226             Difference]: Without dead ends: 31
[2023-11-21 21:00:45,349 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552
[2023-11-21 21:00:45,350 INFO  L413           NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:45,353 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-21 21:00:45,353 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2023-11-21 21:00:45,363 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2023-11-21 21:00:45,364 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:45,365 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions.
[2023-11-21 21:00:45,366 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 18
[2023-11-21 21:00:45,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:45,366 INFO  L495      AbstractCegarLoop]: Abstraction has 31 states and 32 transitions.
[2023-11-21 21:00:45,366 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:45,366 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions.
[2023-11-21 21:00:45,368 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2023-11-21 21:00:45,368 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:45,368 INFO  L195           NwaCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1]
[2023-11-21 21:00:45,393 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2023-11-21 21:00:45,588 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:45,589 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:45,589 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:45,589 INFO  L85        PathProgramCache]: Analyzing trace with hash 1153241407, now seen corresponding path program 3 times
[2023-11-21 21:00:45,589 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:45,589 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920225619]
[2023-11-21 21:00:45,590 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:45,590 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:45,631 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:45,632 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111618212]
[2023-11-21 21:00:45,632 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-11-21 21:00:45,632 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:45,632 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:45,633 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:45,664 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-11-21 21:00:45,755 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2023-11-21 21:00:45,755 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-21 21:00:45,756 INFO  L262         TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core
[2023-11-21 21:00:45,759 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 21:00:46,089 INFO  L349             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-21 21:00:46,089 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62
[2023-11-21 21:00:46,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked.
[2023-11-21 21:00:46,244 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 21:00:46,659 INFO  L349             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-11-21 21:00:46,660 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 111
[2023-11-21 21:00:47,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked.
[2023-11-21 21:00:47,150 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:47,150 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920225619]
[2023-11-21 21:00:47,150 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-21 21:00:47,150 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111618212]
[2023-11-21 21:00:47,151 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [111618212] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 21:00:47,151 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 21:00:47,151 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6
[2023-11-21 21:00:47,151 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069684897]
[2023-11-21 21:00:47,151 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 21:00:47,152 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-11-21 21:00:47,152 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:47,152 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-11-21 21:00:47,152 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2023-11-21 21:00:47,153 INFO  L87              Difference]: Start difference. First operand 31 states and 32 transitions. Second operand  has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:47,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:47,290 INFO  L93              Difference]: Finished difference Result 43 states and 46 transitions.
[2023-11-21 21:00:47,290 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2023-11-21 21:00:47,291 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 30
[2023-11-21 21:00:47,291 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:47,292 INFO  L225             Difference]: With dead ends: 43
[2023-11-21 21:00:47,292 INFO  L226             Difference]: Without dead ends: 41
[2023-11-21 21:00:47,292 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90
[2023-11-21 21:00:47,293 INFO  L413           NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:47,293 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-21 21:00:47,294 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2023-11-21 21:00:47,303 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40.
[2023-11-21 21:00:47,303 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:47,304 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions.
[2023-11-21 21:00:47,304 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 30
[2023-11-21 21:00:47,304 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:47,305 INFO  L495      AbstractCegarLoop]: Abstraction has 40 states and 41 transitions.
[2023-11-21 21:00:47,305 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:47,305 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions.
[2023-11-21 21:00:47,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2023-11-21 21:00:47,306 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:47,306 INFO  L195           NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1]
[2023-11-21 21:00:47,330 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2023-11-21 21:00:47,527 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-11-21 21:00:47,527 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:47,527 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:47,527 INFO  L85        PathProgramCache]: Analyzing trace with hash -1187744233, now seen corresponding path program 4 times
[2023-11-21 21:00:47,528 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:47,528 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385425070]
[2023-11-21 21:00:47,528 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:47,528 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:47,585 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:47,592 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045093989]
[2023-11-21 21:00:47,593 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2023-11-21 21:00:47,593 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:47,593 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:47,597 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:47,620 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-11-21 21:00:47,775 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2023-11-21 21:00:47,775 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-11-21 21:00:47,779 INFO  L262         TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core
[2023-11-21 21:00:47,784 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-21 21:00:48,297 INFO  L134       CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2023-11-21 21:00:48,297 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-21 21:00:49,338 INFO  L134       CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2023-11-21 21:00:49,338 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-21 21:00:49,338 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385425070]
[2023-11-21 21:00:49,338 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-21 21:00:49,339 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045093989]
[2023-11-21 21:00:49,339 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045093989] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-21 21:00:49,339 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-21 21:00:49,339 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47
[2023-11-21 21:00:49,339 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453635752]
[2023-11-21 21:00:49,339 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-21 21:00:49,340 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 48 states
[2023-11-21 21:00:49,340 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-21 21:00:49,342 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants.
[2023-11-21 21:00:49,343 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256
[2023-11-21 21:00:49,343 INFO  L87              Difference]: Start difference. First operand 40 states and 41 transitions. Second operand  has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:49,497 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-21 21:00:49,497 INFO  L93              Difference]: Finished difference Result 80 states and 105 transitions.
[2023-11-21 21:00:49,498 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2023-11-21 21:00:49,499 INFO  L78                 Accepts]: Start accepts. Automaton has  has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 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 39
[2023-11-21 21:00:49,500 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-21 21:00:49,503 INFO  L225             Difference]: With dead ends: 80
[2023-11-21 21:00:49,503 INFO  L226             Difference]: Without dead ends: 64
[2023-11-21 21:00:49,504 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256
[2023-11-21 21:00:49,505 INFO  L413           NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-21 21:00:49,506 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-21 21:00:49,506 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 64 states.
[2023-11-21 21:00:49,523 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64.
[2023-11-21 21:00:49,524 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:49,531 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions.
[2023-11-21 21:00:49,531 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 39
[2023-11-21 21:00:49,531 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-21 21:00:49,531 INFO  L495      AbstractCegarLoop]: Abstraction has 64 states and 65 transitions.
[2023-11-21 21:00:49,532 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-11-21 21:00:49,532 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions.
[2023-11-21 21:00:49,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2023-11-21 21:00:49,535 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-21 21:00:49,535 INFO  L195           NwaCegarLoop]: trace histogram [46, 5, 4, 4, 1, 1, 1, 1]
[2023-11-21 21:00:49,560 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2023-11-21 21:00:49,752 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-11-21 21:00:49,752 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-21 21:00:49,753 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-21 21:00:49,753 INFO  L85        PathProgramCache]: Analyzing trace with hash -425397609, now seen corresponding path program 5 times
[2023-11-21 21:00:49,753 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-21 21:00:49,753 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144958414]
[2023-11-21 21:00:49,753 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-21 21:00:49,754 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-21 21:00:49,829 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-21 21:00:49,832 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880160955]
[2023-11-21 21:00:49,832 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2023-11-21 21:00:49,832 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-21 21:00:49,832 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3
[2023-11-21 21:00:49,833 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-21 21:00:49,836 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72d9e564-66ee-4478-b8c1-b1cdd4f37690/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process