/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-30 22:22:49,420 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-30 22:22:49,422 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-03-30 22:22:49,486 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-03-30 22:22:49,495 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2023-03-30 22:22:49,507 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-03-30 22:22:49,507 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-03-30 22:22:49,508 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-03-30 22:22:49,508 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-03-30 22:22:49,509 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-30 22:22:49,510 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-30 22:22:49,511 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2023-03-30 22:22:49,538 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-30 22:22:49,539 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-30 22:22:49,539 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-30 22:22:49,539 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-30 22:22:49,540 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-30 22:22:49,541 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-30 22:22:49,541 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-03-30 22:22:49,541 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-03-30 22:22:49,541 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-03-30 22:22:49,541 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-30 22:22:49,542 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-30 22:22:49,542 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-30 22:22:49,542 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-30 22:22:49,542 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-30 22:22:49,543 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-30 22:22:49,543 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-30 22:22:49,544 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-30 22:22:49,544 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-03-30 22:22:49,545 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-30 22:22:49,545 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-03-30 22:22:49,545 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-03-30 22:22:49,545 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-03-30 22:22:49,545 INFO  L138        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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2023-03-30 22:22:49,789 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-30 22:22:49,812 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-30 22:22:49,814 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-30 22:22:49,815 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-30 22:22:49,815 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-30 22:22:49,816 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c
[2023-03-30 22:22:50,875 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-30 22:22:51,074 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-30 22:22:51,075 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c
[2023-03-30 22:22:51,081 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86fa1c776/bb9699244cb145c6b055615344776219/FLAGd7b7837b3
[2023-03-30 22:22:51,097 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86fa1c776/bb9699244cb145c6b055615344776219
[2023-03-30 22:22:51,099 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-30 22:22:51,100 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-30 22:22:51,103 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-30 22:22:51,103 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-30 22:22:51,110 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-30 22:22:51,111 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,112 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5199c7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51, skipping insertion in model container
[2023-03-30 22:22:51,112 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,119 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-30 22:22:51,135 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-30 22:22:51,260 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421]
[2023-03-30 22:22:51,286 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-30 22:22:51,295 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-30 22:22:51,303 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421]
[2023-03-30 22:22:51,316 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-30 22:22:51,327 INFO  L208         MainTranslator]: Completed translation
[2023-03-30 22:22:51,327 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51 WrapperNode
[2023-03-30 22:22:51,328 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-30 22:22:51,329 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-30 22:22:51,329 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-30 22:22:51,329 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-30 22:22:51,336 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,337 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,343 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,343 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,349 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,358 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,359 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,360 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,362 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-30 22:22:51,363 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-30 22:22:51,363 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-30 22:22:51,363 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-30 22:22:51,364 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (1/1) ...
[2023-03-30 22:22:51,371 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-30 22:22:51,381 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-30 22:22:51,391 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-03-30 22:22:51,396 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-03-30 22:22:51,423 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-30 22:22:51,423 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-30 22:22:51,423 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-30 22:22:51,423 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-03-30 22:22:51,423 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-03-30 22:22:51,424 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-30 22:22:51,424 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-30 22:22:51,424 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-30 22:22:51,424 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-30 22:22:51,424 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-30 22:22:51,425 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-03-30 22:22:51,426 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-03-30 22:22:51,426 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-30 22:22:51,427 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-30 22:22:51,428 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-30 22:22:51,533 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-30 22:22:51,535 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-30 22:22:51,818 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-30 22:22:51,824 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-30 22:22:51,824 INFO  L302             CfgBuilder]: Removed 11 assume(true) statements.
[2023-03-30 22:22:51,826 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:22:51 BoogieIcfgContainer
[2023-03-30 22:22:51,826 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-30 22:22:51,828 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-30 22:22:51,828 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-30 22:22:51,831 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-30 22:22:51,831 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:22:51" (1/3) ...
[2023-03-30 22:22:51,832 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38210eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:22:51, skipping insertion in model container
[2023-03-30 22:22:51,832 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:22:51" (2/3) ...
[2023-03-30 22:22:51,832 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38210eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:22:51, skipping insertion in model container
[2023-03-30 22:22:51,832 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:22:51" (3/3) ...
[2023-03-30 22:22:51,838 INFO  L112   eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c
[2023-03-30 22:22:51,854 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-30 22:22:51,854 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-30 22:22:51,908 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-30 22:22:51,915 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@383f6270, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-03-30 22:22:51,915 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-30 22:22:51,919 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 51 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-30 22:22:51,927 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-03-30 22:22:51,927 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-30 22:22:51,927 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-30 22:22:51,928 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-30 22:22:51,933 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-30 22:22:51,934 INFO  L85        PathProgramCache]: Analyzing trace with hash -1546601285, now seen corresponding path program 1 times
[2023-03-30 22:22:51,963 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-30 22:22:51,964 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075867694]
[2023-03-30 22:22:51,964 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-30 22:22:51,965 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-30 22:22:52,092 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:52,269 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-30 22:22:52,283 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:52,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-30 22:22:52,289 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-30 22:22:52,289 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075867694]
[2023-03-30 22:22:52,290 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075867694] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-30 22:22:52,290 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-30 22:22:52,290 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-03-30 22:22:52,291 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940517523]
[2023-03-30 22:22:52,292 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-30 22:22:52,296 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-03-30 22:22:52,296 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-30 22:22:52,316 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-03-30 22:22:52,317 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-03-30 22:22:52,319 INFO  L87              Difference]: Start difference. First operand  has 51 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:52,459 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-30 22:22:52,459 INFO  L93              Difference]: Finished difference Result 95 states and 141 transitions.
[2023-03-30 22:22:52,460 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-03-30 22:22:52,462 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32
[2023-03-30 22:22:52,462 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-30 22:22:52,468 INFO  L225             Difference]: With dead ends: 95
[2023-03-30 22:22:52,468 INFO  L226             Difference]: Without dead ends: 46
[2023-03-30 22:22:52,471 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-03-30 22:22:52,476 INFO  L413           NwaCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-03-30 22:22:52,477 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-03-30 22:22:52,491 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2023-03-30 22:22:52,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45.
[2023-03-30 22:22:52,509 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 45 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:52,510 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions.
[2023-03-30 22:22:52,511 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32
[2023-03-30 22:22:52,511 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-30 22:22:52,511 INFO  L495      AbstractCegarLoop]: Abstraction has 45 states and 55 transitions.
[2023-03-30 22:22:52,512 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:52,512 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions.
[2023-03-30 22:22:52,512 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2023-03-30 22:22:52,512 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-30 22:22:52,513 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-30 22:22:52,513 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-30 22:22:52,513 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-30 22:22:52,513 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-30 22:22:52,513 INFO  L85        PathProgramCache]: Analyzing trace with hash -1769864063, now seen corresponding path program 1 times
[2023-03-30 22:22:52,514 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-30 22:22:52,514 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144862948]
[2023-03-30 22:22:52,514 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-30 22:22:52,514 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-30 22:22:52,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:52,636 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-30 22:22:52,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:52,645 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-03-30 22:22:52,645 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-30 22:22:52,645 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144862948]
[2023-03-30 22:22:52,646 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144862948] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-30 22:22:52,646 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-30 22:22:52,646 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-30 22:22:52,646 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659515415]
[2023-03-30 22:22:52,646 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-30 22:22:52,647 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-30 22:22:52,647 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-30 22:22:52,648 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-30 22:22:52,648 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-03-30 22:22:52,648 INFO  L87              Difference]: Start difference. First operand 45 states and 55 transitions. Second operand  has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:52,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-30 22:22:52,799 INFO  L93              Difference]: Finished difference Result 98 states and 126 transitions.
[2023-03-30 22:22:52,800 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-30 22:22:52,800 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34
[2023-03-30 22:22:52,800 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-30 22:22:52,803 INFO  L225             Difference]: With dead ends: 98
[2023-03-30 22:22:52,803 INFO  L226             Difference]: Without dead ends: 66
[2023-03-30 22:22:52,804 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-03-30 22:22:52,805 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-03-30 22:22:52,805 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-03-30 22:22:52,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2023-03-30 22:22:52,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55.
[2023-03-30 22:22:52,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 55 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:52,812 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions.
[2023-03-30 22:22:52,812 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34
[2023-03-30 22:22:52,813 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-30 22:22:52,813 INFO  L495      AbstractCegarLoop]: Abstraction has 55 states and 65 transitions.
[2023-03-30 22:22:52,813 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:52,813 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions.
[2023-03-30 22:22:52,814 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2023-03-30 22:22:52,814 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-30 22:22:52,814 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-30 22:22:52,815 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-30 22:22:52,815 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-30 22:22:52,815 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-30 22:22:52,815 INFO  L85        PathProgramCache]: Analyzing trace with hash -845230611, now seen corresponding path program 1 times
[2023-03-30 22:22:52,816 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-30 22:22:52,816 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767623995]
[2023-03-30 22:22:52,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-30 22:22:52,816 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-30 22:22:52,847 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:52,971 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-30 22:22:52,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:52,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-03-30 22:22:52,979 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-30 22:22:52,979 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767623995]
[2023-03-30 22:22:52,980 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767623995] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-30 22:22:52,980 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654763369]
[2023-03-30 22:22:52,980 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-30 22:22:52,980 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-30 22:22:52,981 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-30 22:22:52,987 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)
[2023-03-30 22:22:53,009 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-30 22:22:53,080 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:53,082 INFO  L262         TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-30 22:22:53,089 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-30 22:22:53,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-03-30 22:22:53,176 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-30 22:22:53,216 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2023-03-30 22:22:53,216 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654763369] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-30 22:22:53,217 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-03-30 22:22:53,217 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8
[2023-03-30 22:22:53,221 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589013181]
[2023-03-30 22:22:53,221 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-03-30 22:22:53,223 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-03-30 22:22:53,223 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-30 22:22:53,227 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-03-30 22:22:53,227 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-03-30 22:22:53,227 INFO  L87              Difference]: Start difference. First operand 55 states and 65 transitions. Second operand  has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:53,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-30 22:22:53,342 INFO  L93              Difference]: Finished difference Result 103 states and 123 transitions.
[2023-03-30 22:22:53,342 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-30 22:22:53,343 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54
[2023-03-30 22:22:53,343 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-30 22:22:53,346 INFO  L225             Difference]: With dead ends: 103
[2023-03-30 22:22:53,347 INFO  L226             Difference]: Without dead ends: 58
[2023-03-30 22:22:53,347 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-03-30 22:22:53,350 INFO  L413           NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-03-30 22:22:53,352 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-03-30 22:22:53,353 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2023-03-30 22:22:53,359 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57.
[2023-03-30 22:22:53,360 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:53,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions.
[2023-03-30 22:22:53,360 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54
[2023-03-30 22:22:53,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-30 22:22:53,361 INFO  L495      AbstractCegarLoop]: Abstraction has 57 states and 67 transitions.
[2023-03-30 22:22:53,361 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:53,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions.
[2023-03-30 22:22:53,362 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-03-30 22:22:53,362 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-30 22:22:53,362 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-30 22:22:53,369 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-03-30 22:22:53,568 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-30 22:22:53,568 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-30 22:22:53,570 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-30 22:22:53,570 INFO  L85        PathProgramCache]: Analyzing trace with hash 312682443, now seen corresponding path program 2 times
[2023-03-30 22:22:53,570 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-30 22:22:53,570 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894878271]
[2023-03-30 22:22:53,570 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-30 22:22:53,571 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-30 22:22:53,616 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:53,753 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-30 22:22:53,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:22:53,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-03-30 22:22:53,763 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-30 22:22:53,763 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894878271]
[2023-03-30 22:22:53,764 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894878271] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-30 22:22:53,766 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444783498]
[2023-03-30 22:22:53,766 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-03-30 22:22:53,766 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-30 22:22:53,766 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-30 22:22:53,768 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)
[2023-03-30 22:22:53,771 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-03-30 22:22:53,848 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-03-30 22:22:53,848 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-30 22:22:53,849 INFO  L262         TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-30 22:22:53,854 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-30 22:22:53,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-03-30 22:22:53,947 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-30 22:22:54,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-03-30 22:22:54,028 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444783498] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-30 22:22:54,028 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-03-30 22:22:54,028 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9
[2023-03-30 22:22:54,030 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874589275]
[2023-03-30 22:22:54,031 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-03-30 22:22:54,032 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-03-30 22:22:54,035 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-30 22:22:54,036 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-03-30 22:22:54,037 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2023-03-30 22:22:54,037 INFO  L87              Difference]: Start difference. First operand 57 states and 67 transitions. Second operand  has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:54,246 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-30 22:22:54,247 INFO  L93              Difference]: Finished difference Result 129 states and 157 transitions.
[2023-03-30 22:22:54,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-03-30 22:22:54,247 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56
[2023-03-30 22:22:54,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-30 22:22:54,251 INFO  L225             Difference]: With dead ends: 129
[2023-03-30 22:22:54,251 INFO  L226             Difference]: Without dead ends: 88
[2023-03-30 22:22:54,252 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2023-03-30 22:22:54,254 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-03-30 22:22:54,255 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 31 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-03-30 22:22:54,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2023-03-30 22:22:54,272 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77.
[2023-03-30 22:22:54,272 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:54,273 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions.
[2023-03-30 22:22:54,273 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56
[2023-03-30 22:22:54,273 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-30 22:22:54,273 INFO  L495      AbstractCegarLoop]: Abstraction has 77 states and 87 transitions.
[2023-03-30 22:22:54,274 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 8 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-30 22:22:54,274 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions.
[2023-03-30 22:22:54,275 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 77
[2023-03-30 22:22:54,275 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-30 22:22:54,276 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-30 22:22:54,286 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-03-30 22:22:54,483 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2023-03-30 22:22:54,484 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-30 22:22:54,484 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-30 22:22:54,484 INFO  L85        PathProgramCache]: Analyzing trace with hash -1666836425, now seen corresponding path program 3 times
[2023-03-30 22:22:54,484 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-30 22:22:54,485 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430853456]
[2023-03-30 22:22:54,485 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-30 22:22:54,485 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-30 22:22:54,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:23:00,907 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-30 22:23:00,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-30 22:23:00,916 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-30 22:23:00,916 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-30 22:23:00,916 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430853456]
[2023-03-30 22:23:00,916 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430853456] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-30 22:23:00,916 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225209897]
[2023-03-30 22:23:00,916 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-03-30 22:23:00,917 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-30 22:23:00,917 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-30 22:23:00,918 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)
[2023-03-30 22:23:00,931 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-03-30 22:23:01,001 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2023-03-30 22:23:01,001 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-30 22:23:01,004 INFO  L262         TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 104 conjunts are in the unsatisfiable core
[2023-03-30 22:23:01,011 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-30 22:23:17,150 INFO  L321             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2023-03-30 22:23:17,151 INFO  L350             Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14
[2023-03-30 22:23:17,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-30 22:23:17,749 INFO  L327         TraceCheckSpWp]: Computing backward predicates...