./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound100.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 4a390ef5
Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b8588da8d66d82eb7aa3eaf3ef7c4d24b2b275bf9c1acdf38a110c8bc6eba3b7
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-4a390ef-m
[2024-10-24 00:30:59,036 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-10-24 00:30:59,097 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2024-10-24 00:30:59,103 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-10-24 00:30:59,103 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-10-24 00:30:59,133 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-10-24 00:30:59,133 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-10-24 00:30:59,134 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-10-24 00:30:59,135 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-10-24 00:30:59,136 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-10-24 00:30:59,137 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-10-24 00:30:59,137 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-10-24 00:30:59,137 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-10-24 00:30:59,138 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-10-24 00:30:59,139 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-10-24 00:30:59,140 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-10-24 00:30:59,140 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-10-24 00:30:59,140 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-10-24 00:30:59,140 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-10-24 00:30:59,141 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-10-24 00:30:59,141 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-10-24 00:30:59,143 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-10-24 00:30:59,144 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-10-24 00:30:59,144 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-10-24 00:30:59,144 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-10-24 00:30:59,144 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-10-24 00:30:59,145 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-10-24 00:30:59,145 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-10-24 00:30:59,145 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-10-24 00:30:59,145 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-10-24 00:30:59,145 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-10-24 00:30:59,146 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-10-24 00:30:59,146 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-24 00:30:59,146 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-10-24 00:30:59,146 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-10-24 00:30:59,146 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-10-24 00:30:59,147 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2024-10-24 00:30:59,147 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-10-24 00:30:59,147 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-10-24 00:30:59,147 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-10-24 00:30:59,147 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-10-24 00:30:59,148 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-10-24 00:30:59,148 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
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 -> b8588da8d66d82eb7aa3eaf3ef7c4d24b2b275bf9c1acdf38a110c8bc6eba3b7
[2024-10-24 00:30:59,411 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-10-24 00:30:59,435 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-10-24 00:30:59,438 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-10-24 00:30:59,439 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-10-24 00:30:59,440 INFO  L274        PluginConnector]: CDTParser initialized
[2024-10-24 00:30:59,441 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound100.c
[2024-10-24 00:31:00,829 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-10-24 00:31:01,011 INFO  L384              CDTParser]: Found 1 translation units.
[2024-10-24 00:31:01,011 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound100.c
[2024-10-24 00:31:01,017 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e3a82ca/5a57422c2f1c440892bfb5f12ddf78a2/FLAG06e3496a5
[2024-10-24 00:31:01,401 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05e3a82ca/5a57422c2f1c440892bfb5f12ddf78a2
[2024-10-24 00:31:01,402 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-10-24 00:31:01,404 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-10-24 00:31:01,405 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-10-24 00:31:01,405 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-10-24 00:31:01,413 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-10-24 00:31:01,414 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,414 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbcc72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01, skipping insertion in model container
[2024-10-24 00:31:01,415 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,439 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-10-24 00:31:01,613 WARN  L248   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound100.c[458,471]
[2024-10-24 00:31:01,640 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-24 00:31:01,649 INFO  L200         MainTranslator]: Completed pre-run
[2024-10-24 00:31:01,660 WARN  L248   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound100.c[458,471]
[2024-10-24 00:31:01,672 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-24 00:31:01,691 INFO  L204         MainTranslator]: Completed translation
[2024-10-24 00:31:01,692 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01 WrapperNode
[2024-10-24 00:31:01,692 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-10-24 00:31:01,693 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-10-24 00:31:01,694 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-10-24 00:31:01,694 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-10-24 00:31:01,701 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,706 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,721 INFO  L138                Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36
[2024-10-24 00:31:01,721 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-10-24 00:31:01,722 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-10-24 00:31:01,722 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-10-24 00:31:01,722 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-10-24 00:31:01,731 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,731 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,736 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,746 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2024-10-24 00:31:01,747 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,747 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,749 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,752 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,752 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,753 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,755 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-10-24 00:31:01,757 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-10-24 00:31:01,757 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-10-24 00:31:01,757 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-10-24 00:31:01,757 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (1/1) ...
[2024-10-24 00:31:01,761 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-24 00:31:01,771 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-24 00:31:01,794 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-10-24 00:31:01,800 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-10-24 00:31:01,845 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-10-24 00:31:01,845 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-10-24 00:31:01,845 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-10-24 00:31:01,845 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2024-10-24 00:31:01,845 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-10-24 00:31:01,845 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-10-24 00:31:01,846 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2024-10-24 00:31:01,847 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2024-10-24 00:31:01,912 INFO  L238             CfgBuilder]: Building ICFG
[2024-10-24 00:31:01,914 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-10-24 00:31:02,139 INFO  L?                        ?]: Removed 6 outVars from TransFormulas that were not future-live.
[2024-10-24 00:31:02,140 INFO  L287             CfgBuilder]: Performing block encoding
[2024-10-24 00:31:02,160 INFO  L309             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-10-24 00:31:02,161 INFO  L314             CfgBuilder]: Removed 1 assume(true) statements.
[2024-10-24 00:31:02,161 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:31:02 BoogieIcfgContainer
[2024-10-24 00:31:02,161 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-10-24 00:31:02,163 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-10-24 00:31:02,164 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-10-24 00:31:02,168 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-10-24 00:31:02,168 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:31:01" (1/3) ...
[2024-10-24 00:31:02,169 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2591e94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:31:02, skipping insertion in model container
[2024-10-24 00:31:02,169 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:01" (2/3) ...
[2024-10-24 00:31:02,170 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2591e94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:31:02, skipping insertion in model container
[2024-10-24 00:31:02,170 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:31:02" (3/3) ...
[2024-10-24 00:31:02,171 INFO  L112   eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound100.c
[2024-10-24 00:31:02,182 INFO  L209   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-10-24 00:31:02,182 INFO  L149   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-10-24 00:31:02,230 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-10-24 00:31:02,241 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=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;@6fb99fcf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-10-24 00:31:02,241 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-10-24 00:31:02,244 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 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)
[2024-10-24 00:31:02,249 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-10-24 00:31:02,250 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-24 00:31:02,250 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-24 00:31:02,251 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-24 00:31:02,255 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-24 00:31:02,256 INFO  L85        PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times
[2024-10-24 00:31:02,264 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-24 00:31:02,264 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336236124]
[2024-10-24 00:31:02,264 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:02,265 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-24 00:31:02,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-24 00:31:02,419 INFO  L368   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2024-10-24 00:31:02,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-24 00:31:02,435 INFO  L368   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2024-10-24 00:31:02,436 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-24 00:31:02,440 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-10-24 00:31:02,444 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-24 00:31:02,445 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336236124]
[2024-10-24 00:31:02,445 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336236124] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-24 00:31:02,445 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-24 00:31:02,446 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-10-24 00:31:02,447 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065427551]
[2024-10-24 00:31:02,447 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-24 00:31:02,451 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-10-24 00:31:02,451 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-24 00:31:02,471 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-10-24 00:31:02,471 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-10-24 00:31:02,473 INFO  L87              Difference]: Start difference. First operand  has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 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) Second operand  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2024-10-24 00:31:02,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-24 00:31:02,495 INFO  L93              Difference]: Finished difference Result 40 states and 58 transitions.
[2024-10-24 00:31:02,496 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-10-24 00:31:02,497 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17
[2024-10-24 00:31:02,497 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-24 00:31:02,502 INFO  L225             Difference]: With dead ends: 40
[2024-10-24 00:31:02,502 INFO  L226             Difference]: Without dead ends: 19
[2024-10-24 00:31:02,504 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-10-24 00:31:02,507 INFO  L432           NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-24 00:31:02,507 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-24 00:31:02,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2024-10-24 00:31:02,532 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2024-10-24 00:31:02,533 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2024-10-24 00:31:02,533 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions.
[2024-10-24 00:31:02,535 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17
[2024-10-24 00:31:02,535 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-24 00:31:02,535 INFO  L471      AbstractCegarLoop]: Abstraction has 19 states and 22 transitions.
[2024-10-24 00:31:02,535 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2024-10-24 00:31:02,535 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions.
[2024-10-24 00:31:02,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-10-24 00:31:02,536 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-24 00:31:02,536 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-24 00:31:02,537 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-10-24 00:31:02,537 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-24 00:31:02,537 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-24 00:31:02,537 INFO  L85        PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times
[2024-10-24 00:31:02,538 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-24 00:31:02,538 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708373813]
[2024-10-24 00:31:02,538 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:02,538 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-24 00:31:02,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-10-24 00:31:02,566 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361998468]
[2024-10-24 00:31:02,566 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:02,567 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:02,567 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-24 00:31:02,569 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-24 00:31:02,570 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-10-24 00:31:02,617 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-24 00:31:02,620 INFO  L255         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core
[2024-10-24 00:31:02,625 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-24 00:31:02,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-10-24 00:31:02,714 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-10-24 00:31:02,714 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-24 00:31:02,714 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708373813]
[2024-10-24 00:31:02,715 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-10-24 00:31:02,715 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361998468]
[2024-10-24 00:31:02,715 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [361998468] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-24 00:31:02,715 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-24 00:31:02,715 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-10-24 00:31:02,716 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677328117]
[2024-10-24 00:31:02,717 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-24 00:31:02,717 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2024-10-24 00:31:02,717 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-24 00:31:02,718 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2024-10-24 00:31:02,718 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2024-10-24 00:31:02,719 INFO  L87              Difference]: Start difference. First operand 19 states and 22 transitions. Second operand  has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 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)
[2024-10-24 00:31:02,786 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-24 00:31:02,786 INFO  L93              Difference]: Finished difference Result 30 states and 35 transitions.
[2024-10-24 00:31:02,786 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2024-10-24 00:31:02,787 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 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 17
[2024-10-24 00:31:02,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-24 00:31:02,788 INFO  L225             Difference]: With dead ends: 30
[2024-10-24 00:31:02,788 INFO  L226             Difference]: Without dead ends: 26
[2024-10-24 00:31:02,788 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-10-24 00:31:02,789 INFO  L432           NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-24 00:31:02,790 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-24 00:31:02,791 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2024-10-24 00:31:02,796 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2024-10-24 00:31:02,798 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-10-24 00:31:02,799 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions.
[2024-10-24 00:31:02,799 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17
[2024-10-24 00:31:02,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-24 00:31:02,799 INFO  L471      AbstractCegarLoop]: Abstraction has 26 states and 29 transitions.
[2024-10-24 00:31:02,799 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 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)
[2024-10-24 00:31:02,800 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions.
[2024-10-24 00:31:02,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2024-10-24 00:31:02,801 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-24 00:31:02,802 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-24 00:31:02,814 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-10-24 00:31:03,002 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:03,003 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-24 00:31:03,003 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-24 00:31:03,003 INFO  L85        PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times
[2024-10-24 00:31:03,004 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-24 00:31:03,004 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309799810]
[2024-10-24 00:31:03,004 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:03,004 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-24 00:31:03,040 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-10-24 00:31:03,043 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557328652]
[2024-10-24 00:31:03,043 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:03,043 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:03,044 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-24 00:31:03,045 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-24 00:31:03,046 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-10-24 00:31:03,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-24 00:31:03,100 INFO  L255         TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core
[2024-10-24 00:31:03,103 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-24 00:31:03,195 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-10-24 00:31:03,195 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-24 00:31:03,317 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2024-10-24 00:31:03,318 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-24 00:31:03,319 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309799810]
[2024-10-24 00:31:03,319 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-10-24 00:31:03,319 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557328652]
[2024-10-24 00:31:03,319 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [557328652] provided 1 perfect and 1 imperfect interpolant sequences
[2024-10-24 00:31:03,320 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-10-24 00:31:03,320 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7
[2024-10-24 00:31:03,320 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930344387]
[2024-10-24 00:31:03,320 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-24 00:31:03,321 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2024-10-24 00:31:03,321 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-24 00:31:03,322 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2024-10-24 00:31:03,323 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2024-10-24 00:31:03,323 INFO  L87              Difference]: Start difference. First operand 26 states and 29 transitions. Second operand  has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2024-10-24 00:31:03,386 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-24 00:31:03,387 INFO  L93              Difference]: Finished difference Result 32 states and 34 transitions.
[2024-10-24 00:31:03,388 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2024-10-24 00:31:03,388 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24
[2024-10-24 00:31:03,388 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-24 00:31:03,389 INFO  L225             Difference]: With dead ends: 32
[2024-10-24 00:31:03,389 INFO  L226             Difference]: Without dead ends: 28
[2024-10-24 00:31:03,390 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2024-10-24 00:31:03,391 INFO  L432           NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-24 00:31:03,393 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-24 00:31:03,394 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2024-10-24 00:31:03,406 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2024-10-24 00:31:03,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2024-10-24 00:31:03,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2024-10-24 00:31:03,408 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24
[2024-10-24 00:31:03,408 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-24 00:31:03,409 INFO  L471      AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2024-10-24 00:31:03,409 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2024-10-24 00:31:03,409 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2024-10-24 00:31:03,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2024-10-24 00:31:03,410 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-24 00:31:03,410 INFO  L215           NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-24 00:31:03,426 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2024-10-24 00:31:03,611 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2024-10-24 00:31:03,611 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-24 00:31:03,612 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-24 00:31:03,612 INFO  L85        PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times
[2024-10-24 00:31:03,612 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-24 00:31:03,612 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150221124]
[2024-10-24 00:31:03,613 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:03,613 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-24 00:31:03,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-10-24 00:31:03,663 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850110947]
[2024-10-24 00:31:03,664 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:03,664 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:03,664 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-24 00:31:03,666 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-24 00:31:03,667 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-10-24 00:31:03,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-24 00:31:03,717 INFO  L255         TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjuncts are in the unsatisfiable core
[2024-10-24 00:31:03,720 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-24 00:31:03,957 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2024-10-24 00:31:03,961 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-24 00:31:04,441 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2024-10-24 00:31:04,442 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-24 00:31:04,442 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150221124]
[2024-10-24 00:31:04,442 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-10-24 00:31:04,442 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850110947]
[2024-10-24 00:31:04,442 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850110947] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-24 00:31:04,442 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-10-24 00:31:04,442 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15
[2024-10-24 00:31:04,443 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713587545]
[2024-10-24 00:31:04,443 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-10-24 00:31:04,443 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2024-10-24 00:31:04,444 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-24 00:31:04,444 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2024-10-24 00:31:04,444 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210
[2024-10-24 00:31:04,445 INFO  L87              Difference]: Start difference. First operand 28 states and 30 transitions. Second operand  has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8)
[2024-10-24 00:31:04,900 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-24 00:31:04,901 INFO  L93              Difference]: Finished difference Result 49 states and 57 transitions.
[2024-10-24 00:31:04,901 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2024-10-24 00:31:04,902 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35
[2024-10-24 00:31:04,902 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-24 00:31:04,903 INFO  L225             Difference]: With dead ends: 49
[2024-10-24 00:31:04,903 INFO  L226             Difference]: Without dead ends: 41
[2024-10-24 00:31:04,903 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306
[2024-10-24 00:31:04,904 INFO  L432           NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2024-10-24 00:31:04,905 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2024-10-24 00:31:04,905 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2024-10-24 00:31:04,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41.
[2024-10-24 00:31:04,917 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2024-10-24 00:31:04,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions.
[2024-10-24 00:31:04,918 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35
[2024-10-24 00:31:04,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-24 00:31:04,918 INFO  L471      AbstractCegarLoop]: Abstraction has 41 states and 45 transitions.
[2024-10-24 00:31:04,918 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8)
[2024-10-24 00:31:04,918 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions.
[2024-10-24 00:31:04,919 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2024-10-24 00:31:04,920 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-24 00:31:04,920 INFO  L215           NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-24 00:31:04,937 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2024-10-24 00:31:05,120 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:05,121 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-24 00:31:05,121 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-24 00:31:05,121 INFO  L85        PathProgramCache]: Analyzing trace with hash 459274687, now seen corresponding path program 2 times
[2024-10-24 00:31:05,122 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-24 00:31:05,122 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858504721]
[2024-10-24 00:31:05,122 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:05,122 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-24 00:31:05,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-10-24 00:31:05,185 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322139337]
[2024-10-24 00:31:05,185 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-10-24 00:31:05,185 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:05,186 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-24 00:31:05,189 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-24 00:31:05,191 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-10-24 00:31:05,271 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-10-24 00:31:05,272 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-10-24 00:31:05,276 INFO  L255         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core
[2024-10-24 00:31:05,282 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-24 00:31:05,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked.
[2024-10-24 00:31:05,511 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-24 00:31:05,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked.
[2024-10-24 00:31:05,827 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-24 00:31:05,827 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858504721]
[2024-10-24 00:31:05,827 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2024-10-24 00:31:05,827 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322139337]
[2024-10-24 00:31:05,828 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [322139337] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-24 00:31:05,828 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-10-24 00:31:05,828 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21
[2024-10-24 00:31:05,828 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894132278]
[2024-10-24 00:31:05,828 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-10-24 00:31:05,829 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2024-10-24 00:31:05,829 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-24 00:31:05,830 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2024-10-24 00:31:05,830 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420
[2024-10-24 00:31:05,830 INFO  L87              Difference]: Start difference. First operand 41 states and 45 transitions. Second operand  has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15)
[2024-10-24 00:31:06,362 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-24 00:31:06,362 INFO  L93              Difference]: Finished difference Result 66 states and 81 transitions.
[2024-10-24 00:31:06,364 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2024-10-24 00:31:06,364 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) Word has length 56
[2024-10-24 00:31:06,364 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-24 00:31:06,365 INFO  L225             Difference]: With dead ends: 66
[2024-10-24 00:31:06,366 INFO  L226             Difference]: Without dead ends: 58
[2024-10-24 00:31:06,367 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992
[2024-10-24 00:31:06,368 INFO  L432           NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-10-24 00:31:06,368 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 300 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-10-24 00:31:06,371 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2024-10-24 00:31:06,403 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56.
[2024-10-24 00:31:06,403 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13)
[2024-10-24 00:31:06,406 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions.
[2024-10-24 00:31:06,406 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 56
[2024-10-24 00:31:06,407 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-24 00:31:06,407 INFO  L471      AbstractCegarLoop]: Abstraction has 56 states and 65 transitions.
[2024-10-24 00:31:06,407 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15)
[2024-10-24 00:31:06,408 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions.
[2024-10-24 00:31:06,409 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2024-10-24 00:31:06,410 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-24 00:31:06,410 INFO  L215           NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-24 00:31:06,427 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2024-10-24 00:31:06,614 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:06,615 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-24 00:31:06,616 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-24 00:31:06,616 INFO  L85        PathProgramCache]: Analyzing trace with hash -1077833742, now seen corresponding path program 3 times
[2024-10-24 00:31:06,616 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-24 00:31:06,616 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395227604]
[2024-10-24 00:31:06,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-24 00:31:06,616 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-24 00:31:06,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unknown
[2024-10-24 00:31:06,703 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792459953]
[2024-10-24 00:31:06,703 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-10-24 00:31:06,703 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-24 00:31:06,704 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-24 00:31:06,705 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-24 00:31:06,709 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-10-24 00:31:06,825 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2024-10-24 00:31:06,825 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-10-24 00:31:06,828 INFO  L255         TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 81 conjuncts are in the unsatisfiable core
[2024-10-24 00:31:06,832 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-24 00:31:07,227 INFO  L134       CoverageAnalysis]: Checked inductivity of 381 backedges. 72 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked.
[2024-10-24 00:31:07,227 INFO  L311         TraceCheckSpWp]: Computing backward predicates...