./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 4fc63b2a
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6604dbb2462dfab53c0d37d83d08add09bc53abffb53773fd7099f9e7acddff3
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-4fc63b2
[2024-11-02 12:29:01,681 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-02 12:29:01,782 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf
[2024-11-02 12:29:01,789 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-02 12:29:01,790 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-02 12:29:01,828 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-02 12:29:01,829 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-02 12:29:01,829 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-02 12:29:01,830 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-02 12:29:01,830 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-02 12:29:01,831 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2024-11-02 12:29:01,831 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2024-11-02 12:29:01,832 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2024-11-02 12:29:01,832 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2024-11-02 12:29:01,832 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2024-11-02 12:29:01,833 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2024-11-02 12:29:01,834 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2024-11-02 12:29:01,838 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2024-11-02 12:29:01,838 INFO  L153        SettingsManager]:  * Interval Domain=false
[2024-11-02 12:29:01,839 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2024-11-02 12:29:01,839 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2024-11-02 12:29:01,839 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2024-11-02 12:29:01,840 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-02 12:29:01,840 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-02 12:29:01,841 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-11-02 12:29:01,841 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-11-02 12:29:01,841 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-11-02 12:29:01,841 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-02 12:29:01,842 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-02 12:29:01,842 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-02 12:29:01,842 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-02 12:29:01,843 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-02 12:29:01,845 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-11-02 12:29:01,846 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-02 12:29:01,846 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-02 12:29:01,846 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-02 12:29:01,846 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-02 12:29:01,847 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-02 12:29:01,847 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-02 12:29:01,847 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-02 12:29:01,848 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-02 12:29:01,848 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-02 12:29:01,848 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2024-11-02 12:29:01,849 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-11-02 12:29:01,850 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-02 12:29:01,850 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2024-11-02 12:29:01,850 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-02 12:29:01,850 INFO  L153        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
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_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/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_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2
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 -> Taipan
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 -> 6604dbb2462dfab53c0d37d83d08add09bc53abffb53773fd7099f9e7acddff3
[2024-11-02 12:29:02,156 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-02 12:29:02,184 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-02 12:29:02,187 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-02 12:29:02,189 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-02 12:29:02,189 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-02 12:29:02,190 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i
Unable to find full path for "g++"
[2024-11-02 12:29:04,188 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-02 12:29:04,390 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-02 12:29:04,391 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i
[2024-11-02 12:29:04,398 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/data/4a48113e6/d0177165833f41adb3eb84e43e848673/FLAGad70895dd
[2024-11-02 12:29:04,414 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/data/4a48113e6/d0177165833f41adb3eb84e43e848673
[2024-11-02 12:29:04,417 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-02 12:29:04,418 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-11-02 12:29:04,420 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-02 12:29:04,420 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-02 12:29:04,426 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-02 12:29:04,427 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,428 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd32d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04, skipping insertion in model container
[2024-11-02 12:29:04,428 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,449 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-02 12:29:04,686 WARN  L251   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_7a7ba946-9493-4425-9e34-afb53767788c/sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i[919,932]
[2024-11-02 12:29:04,713 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-02 12:29:04,723 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-02 12:29:04,738 WARN  L251   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_7a7ba946-9493-4425-9e34-afb53767788c/sv-benchmarks/c/loop-crafted/simple_array_index_value_4.i[919,932]
[2024-11-02 12:29:04,756 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-02 12:29:04,776 INFO  L204         MainTranslator]: Completed translation
[2024-11-02 12:29:04,777 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04 WrapperNode
[2024-11-02 12:29:04,777 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-02 12:29:04,778 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-02 12:29:04,779 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-02 12:29:04,779 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-02 12:29:04,786 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,798 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,826 INFO  L138                Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67
[2024-11-02 12:29:04,827 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-02 12:29:04,827 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-02 12:29:04,827 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-02 12:29:04,828 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-02 12:29:04,838 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,838 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,840 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,842 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,851 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,859 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,860 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,864 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,866 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-02 12:29:04,867 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-02 12:29:04,868 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-02 12:29:04,872 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-02 12:29:04,873 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (1/1) ...
[2024-11-02 12:29:04,879 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-02 12:29:04,891 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:29:04,911 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2024-11-02 12:29:04,914 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2024-11-02 12:29:04,944 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-02 12:29:04,944 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-11-02 12:29:04,945 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-11-02 12:29:04,945 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2024-11-02 12:29:04,945 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2024-11-02 12:29:04,945 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2024-11-02 12:29:04,945 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-02 12:29:04,946 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-02 12:29:04,946 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2024-11-02 12:29:04,946 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2024-11-02 12:29:04,946 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2024-11-02 12:29:04,947 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2024-11-02 12:29:05,040 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-02 12:29:05,043 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-02 12:29:05,220 INFO  L?                        ?]: Removed 10 outVars from TransFormulas that were not future-live.
[2024-11-02 12:29:05,220 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-02 12:29:05,267 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-02 12:29:05,268 INFO  L316             CfgBuilder]: Removed 3 assume(true) statements.
[2024-11-02 12:29:05,270 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:05 BoogieIcfgContainer
[2024-11-02 12:29:05,270 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-02 12:29:05,273 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-02 12:29:05,273 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-02 12:29:05,278 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-02 12:29:05,279 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:29:04" (1/3) ...
[2024-11-02 12:29:05,280 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6946e809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:05, skipping insertion in model container
[2024-11-02 12:29:05,281 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:04" (2/3) ...
[2024-11-02 12:29:05,282 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6946e809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:29:05, skipping insertion in model container
[2024-11-02 12:29:05,283 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:29:05" (3/3) ...
[2024-11-02 12:29:05,284 INFO  L112   eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i
[2024-11-02 12:29:05,307 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-02 12:29:05,307 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-02 12:29:05,377 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-02 12:29:05,384 INFO  L333      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, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@67bf8845, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-02 12:29:05,385 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-02 12:29:05,389 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 24 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-11-02 12:29:05,397 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2024-11-02 12:29:05,398 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:29:05,398 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:29:05,399 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 12:29:05,407 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:29:05,407 INFO  L85        PathProgramCache]: Analyzing trace with hash -287451926, now seen corresponding path program 1 times
[2024-11-02 12:29:05,417 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:29:05,418 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493230169]
[2024-11-02 12:29:05,418 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:05,419 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:29:05,544 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:05,729 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 12:29:05,730 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:29:05,730 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493230169]
[2024-11-02 12:29:05,731 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493230169] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:29:05,731 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 12:29:05,731 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-02 12:29:05,733 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968838750]
[2024-11-02 12:29:05,734 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:29:05,738 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 12:29:05,739 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:29:05,762 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 12:29:05,762 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 12:29:05,764 INFO  L87              Difference]: Start difference. First operand  has 24 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2024-11-02 12:29:05,812 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:29:05,812 INFO  L93              Difference]: Finished difference Result 47 states and 63 transitions.
[2024-11-02 12:29:05,815 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 12:29:05,817 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14
[2024-11-02 12:29:05,818 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:29:05,850 INFO  L225             Difference]: With dead ends: 47
[2024-11-02 12:29:05,850 INFO  L226             Difference]: Without dead ends: 23
[2024-11-02 12:29:05,857 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 12:29:05,866 INFO  L432           NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-02 12:29:05,867 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-02 12:29:05,887 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2024-11-02 12:29:05,923 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2024-11-02 12:29:05,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-11-02 12:29:05,926 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions.
[2024-11-02 12:29:05,929 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14
[2024-11-02 12:29:05,931 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:29:05,931 INFO  L471      AbstractCegarLoop]: Abstraction has 23 states and 28 transitions.
[2024-11-02 12:29:05,931 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2024-11-02 12:29:05,932 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions.
[2024-11-02 12:29:05,933 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2024-11-02 12:29:05,933 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:29:05,933 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:29:05,933 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-11-02 12:29:05,934 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 12:29:05,934 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:29:05,934 INFO  L85        PathProgramCache]: Analyzing trace with hash 735697347, now seen corresponding path program 1 times
[2024-11-02 12:29:05,935 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:29:05,937 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543427789]
[2024-11-02 12:29:05,938 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:05,938 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:29:05,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:06,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 12:29:06,161 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:29:06,161 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543427789]
[2024-11-02 12:29:06,162 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543427789] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:29:06,162 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815392721]
[2024-11-02 12:29:06,162 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:06,162 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:06,163 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:29:06,165 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 12:29:06,167 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-02 12:29:06,258 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:06,262 INFO  L255         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core
[2024-11-02 12:29:06,269 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 12:29:06,514 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 12:29:06,515 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-02 12:29:06,516 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815392721] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:29:06,517 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-11-02 12:29:06,517 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9
[2024-11-02 12:29:06,519 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269021603]
[2024-11-02 12:29:06,519 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:29:06,520 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2024-11-02 12:29:06,522 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:29:06,522 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2024-11-02 12:29:06,524 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2024-11-02 12:29:06,524 INFO  L87              Difference]: Start difference. First operand 23 states and 28 transitions. Second operand  has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2024-11-02 12:29:06,690 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:29:06,690 INFO  L93              Difference]: Finished difference Result 32 states and 37 transitions.
[2024-11-02 12:29:06,690 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2024-11-02 12:29:06,691 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15
[2024-11-02 12:29:06,691 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:29:06,693 INFO  L225             Difference]: With dead ends: 32
[2024-11-02 12:29:06,693 INFO  L226             Difference]: Without dead ends: 30
[2024-11-02 12:29:06,694 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2024-11-02 12:29:06,695 INFO  L432           NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 12:29:06,697 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 12:29:06,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2024-11-02 12:29:06,709 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27.
[2024-11-02 12:29:06,709 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-11-02 12:29:06,712 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions.
[2024-11-02 12:29:06,712 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15
[2024-11-02 12:29:06,713 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:29:06,713 INFO  L471      AbstractCegarLoop]: Abstraction has 27 states and 31 transitions.
[2024-11-02 12:29:06,713 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2024-11-02 12:29:06,714 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions.
[2024-11-02 12:29:06,715 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-11-02 12:29:06,715 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:29:06,715 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:29:06,730 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2024-11-02 12:29:06,916 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:06,917 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 12:29:06,917 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:29:06,917 INFO  L85        PathProgramCache]: Analyzing trace with hash 656486795, now seen corresponding path program 1 times
[2024-11-02 12:29:06,918 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:29:06,918 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030236824]
[2024-11-02 12:29:06,918 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:06,918 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:29:06,979 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:07,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 12:29:07,147 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:29:07,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030236824]
[2024-11-02 12:29:07,147 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030236824] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:29:07,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350946495]
[2024-11-02 12:29:07,148 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:07,148 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:07,148 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:29:07,150 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 12:29:07,152 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-11-02 12:29:07,217 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:07,218 INFO  L255         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjuncts are in the unsatisfiable core
[2024-11-02 12:29:07,220 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 12:29:07,234 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 12:29:07,234 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-02 12:29:07,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 12:29:07,281 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350946495] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-02 12:29:07,282 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140645547]
[2024-11-02 12:29:07,309 INFO  L159        IcfgInterpreter]: Started Sifa with 15 locations of interest
[2024-11-02 12:29:07,310 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-02 12:29:07,314 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-02 12:29:07,320 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-02 12:29:07,321 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-02 12:29:07,895 INFO  L197        IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs
[2024-11-02 12:29:07,899 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-02 12:29:08,210 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSifa [2140645547] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 12:29:08,211 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences.
[2024-11-02 12:29:08,211 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 3, 4] total 14
[2024-11-02 12:29:08,212 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822550338]
[2024-11-02 12:29:08,213 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 12:29:08,214 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2024-11-02 12:29:08,214 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:29:08,215 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2024-11-02 12:29:08,216 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182
[2024-11-02 12:29:08,217 INFO  L87              Difference]: Start difference. First operand 27 states and 31 transitions. Second operand  has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2024-11-02 12:29:08,383 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:29:08,384 INFO  L93              Difference]: Finished difference Result 42 states and 49 transitions.
[2024-11-02 12:29:08,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2024-11-02 12:29:08,385 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17
[2024-11-02 12:29:08,385 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:29:08,385 INFO  L225             Difference]: With dead ends: 42
[2024-11-02 12:29:08,386 INFO  L226             Difference]: Without dead ends: 32
[2024-11-02 12:29:08,386 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182
[2024-11-02 12:29:08,387 INFO  L432           NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 12:29:08,392 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 12:29:08,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2024-11-02 12:29:08,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28.
[2024-11-02 12:29:08,405 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-11-02 12:29:08,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2024-11-02 12:29:08,408 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17
[2024-11-02 12:29:08,408 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:29:08,409 INFO  L471      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2024-11-02 12:29:08,409 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2024-11-02 12:29:08,409 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2024-11-02 12:29:08,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2024-11-02 12:29:08,411 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:29:08,411 INFO  L215           NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:29:08,431 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2024-11-02 12:29:08,615 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:08,616 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 12:29:08,616 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:29:08,617 INFO  L85        PathProgramCache]: Analyzing trace with hash -1785926894, now seen corresponding path program 1 times
[2024-11-02 12:29:08,617 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:29:08,618 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564225044]
[2024-11-02 12:29:08,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:08,620 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:29:08,656 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:08,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-11-02 12:29:08,819 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:29:08,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564225044]
[2024-11-02 12:29:08,821 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564225044] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:29:08,821 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092509486]
[2024-11-02 12:29:08,821 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:08,821 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:08,821 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:29:08,823 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 12:29:08,826 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-11-02 12:29:08,902 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:08,904 INFO  L255         TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjuncts are in the unsatisfiable core
[2024-11-02 12:29:08,906 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 12:29:08,917 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2024-11-02 12:29:08,918 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-02 12:29:08,966 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-11-02 12:29:08,966 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092509486] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-02 12:29:08,967 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31669172]
[2024-11-02 12:29:08,969 INFO  L159        IcfgInterpreter]: Started Sifa with 21 locations of interest
[2024-11-02 12:29:08,969 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-02 12:29:08,970 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-02 12:29:08,970 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-02 12:29:08,970 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-02 12:29:11,412 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 122 for LOIs
[2024-11-02 12:29:11,947 INFO  L197        IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs
[2024-11-02 12:29:11,948 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-02 12:29:21,487 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '670#(and (or (exists ((|v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_#t~mem9#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_24| Int) (|v_ULTIMATE.start_main_#t~mem10#1_BEFORE_CALL_1| Int)) (and (or (and (<= 2147483648 (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_19| 4294967296)) (= |v_ULTIMATE.start_main_#t~mem10#1_BEFORE_CALL_1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_23|) (+ |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_23| (- 17179869184) (* 4 (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_19| 4294967296)))))) (and (<= (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_19| 4294967296) 2147483647) (= |v_ULTIMATE.start_main_#t~mem10#1_BEFORE_CALL_1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_23|) (+ |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_23| (* 4 (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_19| 4294967296))))))) (exists ((|v_ULTIMATE.start_main_~loop_entered~0#1_16| Int)) (= |v_ULTIMATE.start_main_~loop_entered~0#1_16| 1)) (not (= (mod |v_ULTIMATE.start_main_#t~mem9#1_BEFORE_CALL_1| 4294967296) (mod |v_ULTIMATE.start_main_#t~mem10#1_BEFORE_CALL_1| 4294967296))) (<= (+ 1 (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_19| 4294967296)) (mod |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_24| 4294967296)) (or (and (<= (mod |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_24| 4294967296) 2147483647) (= |v_ULTIMATE.start_main_#t~mem9#1_BEFORE_CALL_1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_23|) (+ |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_23| (* (mod |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_24| 4294967296) 4))))) (and (<= 2147483648 (mod |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_24| 4294967296)) (= |v_ULTIMATE.start_main_#t~mem9#1_BEFORE_CALL_1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_23|) (+ |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_23| (- 17179869184) (* (mod |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_24| 4294967296) 4)))))))) (exists ((|v_ULTIMATE.start_main_~loop_entered~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_30| Int)) (and (<= (+ (mod |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_30| 4294967296) 1) (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_25| 4294967296)) (= |v_ULTIMATE.start_main_~loop_entered~0#1_BEFORE_CALL_28| 1) (<= 100000 (mod |v_ULTIMATE.start_main_~index2~0#1_BEFORE_CALL_25| 4294967296))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location
[2024-11-02 12:29:21,488 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-02 12:29:21,488 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-02 12:29:21,488 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7
[2024-11-02 12:29:21,489 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837600353]
[2024-11-02 12:29:21,489 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-02 12:29:21,489 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2024-11-02 12:29:21,490 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 12:29:21,490 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2024-11-02 12:29:21,491 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=438, Unknown=3, NotChecked=0, Total=506
[2024-11-02 12:29:21,491 INFO  L87              Difference]: Start difference. First operand 28 states and 32 transitions. Second operand  has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8)
[2024-11-02 12:29:21,566 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 12:29:21,566 INFO  L93              Difference]: Finished difference Result 56 states and 66 transitions.
[2024-11-02 12:29:21,567 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-02 12:29:21,567 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28
[2024-11-02 12:29:21,568 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 12:29:21,568 INFO  L225             Difference]: With dead ends: 56
[2024-11-02 12:29:21,569 INFO  L226             Difference]: Without dead ends: 31
[2024-11-02 12:29:21,570 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=72, Invalid=477, Unknown=3, NotChecked=0, Total=552
[2024-11-02 12:29:21,571 INFO  L432           NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-02 12:29:21,575 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-02 12:29:21,576 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2024-11-02 12:29:21,583 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2024-11-02 12:29:21,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-11-02 12:29:21,585 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions.
[2024-11-02 12:29:21,587 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28
[2024-11-02 12:29:21,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 12:29:21,587 INFO  L471      AbstractCegarLoop]: Abstraction has 31 states and 35 transitions.
[2024-11-02 12:29:21,588 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8)
[2024-11-02 12:29:21,588 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions.
[2024-11-02 12:29:21,589 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2024-11-02 12:29:21,590 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 12:29:21,590 INFO  L215           NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 12:29:21,611 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2024-11-02 12:29:21,790 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:21,791 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 12:29:21,791 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 12:29:21,791 INFO  L85        PathProgramCache]: Analyzing trace with hash -163528437, now seen corresponding path program 2 times
[2024-11-02 12:29:21,792 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 12:29:21,792 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743620641]
[2024-11-02 12:29:21,792 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 12:29:21,792 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 12:29:21,833 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 12:29:22,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-11-02 12:29:22,030 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 12:29:22,030 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743620641]
[2024-11-02 12:29:22,030 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743620641] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 12:29:22,030 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137669740]
[2024-11-02 12:29:22,030 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-11-02 12:29:22,031 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 12:29:22,031 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 12:29:22,033 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 12:29:22,034 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a7ba946-9493-4425-9e34-afb53767788c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-11-02 12:29:22,312 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2024-11-02 12:29:22,312 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-02 12:29:22,314 INFO  L255         TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 35 conjuncts are in the unsatisfiable core
[2024-11-02 12:29:22,316 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 12:29:23,133 INFO  L349             Elim1Store]: treesize reduction 112, result has 5.9 percent of original size
[2024-11-02 12:29:23,135 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 52
[2024-11-02 12:29:23,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-11-02 12:29:23,336 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-02 12:29:25,718 INFO  L349             Elim1Store]: treesize reduction 135, result has 20.1 percent of original size
[2024-11-02 12:29:25,719 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 227 treesize of output 143
[2024-11-02 12:29:26,417 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2024-11-02 12:29:26,417 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137669740] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-02 12:29:26,420 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690419622]
[2024-11-02 12:29:26,422 INFO  L159        IcfgInterpreter]: Started Sifa with 21 locations of interest
[2024-11-02 12:29:26,423 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-02 12:29:26,423 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-02 12:29:26,423 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-02 12:29:26,423 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-02 12:29:28,278 INFO  L197        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 122 for LOIs
[2024-11-02 12:29:28,663 INFO  L197        IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs
[2024-11-02 12:29:28,664 INFO  L180        IcfgInterpreter]: Interpretation finished