/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/loops-crafted-1/iftelse.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 00:22:01,223 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-03-31 00:22:01,288 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 00:22:01,289 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
[2023-03-31 00:22:01,322 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 00:22:01,322 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 00:22:01,322 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 00:22:01,323 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 00:22:01,323 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 00:22:01,323 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 00:22:01,324 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-03-31 00:22:01,324 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-03-31 00:22:01,324 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-03-31 00:22:01,324 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 00:22:01,324 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 00:22:01,324 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 00:22:01,325 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 00:22:01,326 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 00:22:01,326 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-03-31 00:22:01,326 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 00:22:01,326 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 00:22:01,326 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 00:22:01,326 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 00:22:01,326 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 00:22:01,326 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-03-31 00:22:01,327 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 00:22:01,327 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-03-31 00:22:01,327 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 00:22:01,327 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-03-31 00:22:01,327 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-03-31 00:22:01,327 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-03-31 00:22:01,327 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2023-03-31 00:22:01,559 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 00:22:01,579 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 00:22:01,582 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 00:22:01,583 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 00:22:01,584 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 00:22:01,585 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/iftelse.c
[2023-03-31 00:22:02,755 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 00:22:02,909 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 00:22:02,910 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c
[2023-03-31 00:22:02,915 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836284d93/f731d463e54e4e2d8359df8054b72296/FLAG9f712bf8b
[2023-03-31 00:22:02,933 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836284d93/f731d463e54e4e2d8359df8054b72296
[2023-03-31 00:22:02,936 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 00:22:02,937 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 00:22:02,942 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 00:22:02,942 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 00:22:02,945 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 00:22:02,946 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:22:02" (1/1) ...
[2023-03-31 00:22:02,947 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea6170f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:02, skipping insertion in model container
[2023-03-31 00:22:02,947 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:22:02" (1/1) ...
[2023-03-31 00:22:02,953 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 00:22:02,965 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 00:22:03,115 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/loops-crafted-1/iftelse.c[406,419]
[2023-03-31 00:22:03,131 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 00:22:03,143 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 00:22:03,154 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/loops-crafted-1/iftelse.c[406,419]
[2023-03-31 00:22:03,162 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 00:22:03,175 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 00:22:03,176 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03 WrapperNode
[2023-03-31 00:22:03,176 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 00:22:03,177 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 00:22:03,177 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 00:22:03,177 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 00:22:03,186 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,186 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,191 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,192 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,195 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,198 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,200 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,201 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,202 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 00:22:03,203 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 00:22:03,203 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 00:22:03,203 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 00:22:03,204 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (1/1) ...
[2023-03-31 00:22:03,213 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 00:22:03,225 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:22:03,240 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)
[2023-03-31 00:22:03,246 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
[2023-03-31 00:22:03,278 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 00:22:03,278 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 00:22:03,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 00:22:03,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-03-31 00:22:03,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-03-31 00:22:03,280 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 00:22:03,280 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 00:22:03,280 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 00:22:03,280 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 00:22:03,280 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 00:22:03,281 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 00:22:03,333 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 00:22:03,334 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 00:22:03,462 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 00:22:03,469 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 00:22:03,469 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 00:22:03,471 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:22:03 BoogieIcfgContainer
[2023-03-31 00:22:03,471 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 00:22:03,473 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 00:22:03,473 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 00:22:03,475 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 00:22:03,476 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:22:02" (1/3) ...
[2023-03-31 00:22:03,476 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25106984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:22:03, skipping insertion in model container
[2023-03-31 00:22:03,476 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:22:03" (2/3) ...
[2023-03-31 00:22:03,476 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25106984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:22:03, skipping insertion in model container
[2023-03-31 00:22:03,477 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:22:03" (3/3) ...
[2023-03-31 00:22:03,478 INFO  L112   eAbstractionObserver]: Analyzing ICFG iftelse.c
[2023-03-31 00:22:03,509 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 00:22:03,510 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 00:22:03,597 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 00:22:03,603 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;@586dcf3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-03-31 00:22:03,603 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 00:22:03,614 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 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)
[2023-03-31 00:22:03,621 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2023-03-31 00:22:03,621 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:03,622 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:03,622 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:03,632 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:03,633 INFO  L85        PathProgramCache]: Analyzing trace with hash -1034116429, now seen corresponding path program 1 times
[2023-03-31 00:22:03,641 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:03,642 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776741048]
[2023-03-31 00:22:03,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:03,643 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:03,808 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:04,531 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:04,539 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:04,551 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:04,551 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:04,552 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776741048]
[2023-03-31 00:22:04,552 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776741048] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 00:22:04,552 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 00:22:04,553 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-03-31 00:22:04,555 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321901871]
[2023-03-31 00:22:04,555 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 00:22:04,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-03-31 00:22:04,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:22:04,595 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-03-31 00:22:04,597 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2023-03-31 00:22:04,599 INFO  L87              Difference]: Start difference. First operand  has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 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 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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)
[2023-03-31 00:22:04,930 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:22:04,930 INFO  L93              Difference]: Finished difference Result 52 states and 70 transitions.
[2023-03-31 00:22:04,931 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2023-03-31 00:22:04,932 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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 14
[2023-03-31 00:22:04,933 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:22:04,938 INFO  L225             Difference]: With dead ends: 52
[2023-03-31 00:22:04,938 INFO  L226             Difference]: Without dead ends: 26
[2023-03-31 00:22:04,941 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182
[2023-03-31 00:22:04,945 INFO  L413           NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-03-31 00:22:04,946 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-03-31 00:22:04,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2023-03-31 00:22:04,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25.
[2023-03-31 00:22:04,984 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-31 00:22:04,985 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions.
[2023-03-31 00:22:04,986 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14
[2023-03-31 00:22:04,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:22:04,987 INFO  L495      AbstractCegarLoop]: Abstraction has 25 states and 28 transitions.
[2023-03-31 00:22:04,987 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 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)
[2023-03-31 00:22:04,988 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions.
[2023-03-31 00:22:04,989 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2023-03-31 00:22:04,989 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:04,989 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:04,990 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 00:22:04,990 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:04,991 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:04,991 INFO  L85        PathProgramCache]: Analyzing trace with hash -244126219, now seen corresponding path program 1 times
[2023-03-31 00:22:04,991 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:04,991 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469776884]
[2023-03-31 00:22:04,991 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:04,991 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:05,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:05,043 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:05,045 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:05,055 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:05,055 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:05,055 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469776884]
[2023-03-31 00:22:05,055 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469776884] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 00:22:05,055 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 00:22:05,056 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-03-31 00:22:05,056 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243337451]
[2023-03-31 00:22:05,056 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 00:22:05,057 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-03-31 00:22:05,057 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:22:05,058 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-03-31 00:22:05,058 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-03-31 00:22:05,058 INFO  L87              Difference]: Start difference. First operand 25 states and 28 transitions. Second operand  has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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)
[2023-03-31 00:22:05,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:22:05,132 INFO  L93              Difference]: Finished difference Result 36 states and 41 transitions.
[2023-03-31 00:22:05,132 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-03-31 00:22:05,133 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17
[2023-03-31 00:22:05,133 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:22:05,136 INFO  L225             Difference]: With dead ends: 36
[2023-03-31 00:22:05,136 INFO  L226             Difference]: Without dead ends: 25
[2023-03-31 00:22:05,140 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2023-03-31 00:22:05,142 INFO  L413           NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-03-31 00:22:05,143 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-03-31 00:22:05,145 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2023-03-31 00:22:05,151 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2023-03-31 00:22:05,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-31 00:22:05,152 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2023-03-31 00:22:05,153 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17
[2023-03-31 00:22:05,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:22:05,153 INFO  L495      AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2023-03-31 00:22:05,153 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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)
[2023-03-31 00:22:05,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2023-03-31 00:22:05,154 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2023-03-31 00:22:05,154 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:05,154 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:05,154 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 00:22:05,154 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:05,155 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:05,155 INFO  L85        PathProgramCache]: Analyzing trace with hash 722095884, now seen corresponding path program 1 times
[2023-03-31 00:22:05,155 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:05,155 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897753409]
[2023-03-31 00:22:05,155 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:05,155 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:05,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:05,333 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:05,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:05,341 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-03-31 00:22:05,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:05,350 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:05,350 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:05,350 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897753409]
[2023-03-31 00:22:05,350 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897753409] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:22:05,351 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15363596]
[2023-03-31 00:22:05,351 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:05,352 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:22:05,352 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:22:05,355 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)
[2023-03-31 00:22:05,356 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 00:22:05,409 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:05,411 INFO  L262         TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-03-31 00:22:05,416 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 00:22:05,491 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:05,491 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-03-31 00:22:05,492 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [15363596] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 00:22:05,494 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-03-31 00:22:05,494 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8
[2023-03-31 00:22:05,494 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392190483]
[2023-03-31 00:22:05,494 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 00:22:05,496 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-03-31 00:22:05,497 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:22:05,498 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-03-31 00:22:05,498 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-03-31 00:22:05,498 INFO  L87              Difference]: Start difference. First operand 25 states and 26 transitions. Second operand  has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 00:22:05,534 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:22:05,534 INFO  L93              Difference]: Finished difference Result 39 states and 43 transitions.
[2023-03-31 00:22:05,534 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-03-31 00:22:05,534 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22
[2023-03-31 00:22:05,535 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:22:05,536 INFO  L225             Difference]: With dead ends: 39
[2023-03-31 00:22:05,536 INFO  L226             Difference]: Without dead ends: 29
[2023-03-31 00:22:05,536 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-03-31 00:22:05,537 INFO  L413           NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-03-31 00:22:05,538 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-03-31 00:22:05,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2023-03-31 00:22:05,551 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2023-03-31 00:22:05,552 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4)
[2023-03-31 00:22:05,553 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions.
[2023-03-31 00:22:05,553 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22
[2023-03-31 00:22:05,553 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:22:05,553 INFO  L495      AbstractCegarLoop]: Abstraction has 29 states and 30 transitions.
[2023-03-31 00:22:05,553 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 00:22:05,554 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions.
[2023-03-31 00:22:05,554 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2023-03-31 00:22:05,554 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:05,554 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:05,559 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-03-31 00:22:05,759 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
[2023-03-31 00:22:05,760 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:05,760 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:05,760 INFO  L85        PathProgramCache]: Analyzing trace with hash 779354186, now seen corresponding path program 1 times
[2023-03-31 00:22:05,760 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:05,761 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594716536]
[2023-03-31 00:22:05,761 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:05,761 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:05,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:06,388 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:06,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:06,392 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-03-31 00:22:06,394 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:06,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:06,411 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:06,412 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594716536]
[2023-03-31 00:22:06,412 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594716536] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:22:06,412 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065933252]
[2023-03-31 00:22:06,412 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:06,412 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:22:06,412 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:22:06,413 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)
[2023-03-31 00:22:06,416 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-03-31 00:22:06,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:06,480 INFO  L262         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core
[2023-03-31 00:22:06,482 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 00:22:06,580 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:06,580 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 00:22:06,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:06,819 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065933252] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 00:22:06,819 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-03-31 00:22:06,819 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18
[2023-03-31 00:22:06,819 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680408740]
[2023-03-31 00:22:06,819 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-03-31 00:22:06,820 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-03-31 00:22:06,820 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:22:06,821 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-03-31 00:22:06,821 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306
[2023-03-31 00:22:06,821 INFO  L87              Difference]: Start difference. First operand 29 states and 30 transitions. Second operand  has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-03-31 00:22:08,346 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:22:08,346 INFO  L93              Difference]: Finished difference Result 48 states and 51 transitions.
[2023-03-31 00:22:08,346 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-03-31 00:22:08,347 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22
[2023-03-31 00:22:08,347 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:22:08,348 INFO  L225             Difference]: With dead ends: 48
[2023-03-31 00:22:08,348 INFO  L226             Difference]: Without dead ends: 46
[2023-03-31 00:22:08,348 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870
[2023-03-31 00:22:08,349 INFO  L413           NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-03-31 00:22:08,349 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-03-31 00:22:08,350 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2023-03-31 00:22:08,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45.
[2023-03-31 00:22:08,362 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 45 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7)
[2023-03-31 00:22:08,365 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions.
[2023-03-31 00:22:08,366 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 22
[2023-03-31 00:22:08,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:22:08,366 INFO  L495      AbstractCegarLoop]: Abstraction has 45 states and 48 transitions.
[2023-03-31 00:22:08,366 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-03-31 00:22:08,366 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions.
[2023-03-31 00:22:08,368 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2023-03-31 00:22:08,368 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:08,371 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:08,384 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-03-31 00:22:08,580 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
[2023-03-31 00:22:08,581 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:08,581 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:08,581 INFO  L85        PathProgramCache]: Analyzing trace with hash -523098717, now seen corresponding path program 2 times
[2023-03-31 00:22:08,581 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:08,581 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834757817]
[2023-03-31 00:22:08,581 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:08,582 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:08,617 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:08,958 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:08,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:08,962 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-03-31 00:22:08,964 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:08,968 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2023-03-31 00:22:08,970 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:08,975 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 00:22:08,975 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:08,975 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834757817]
[2023-03-31 00:22:08,975 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834757817] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:22:08,975 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421478116]
[2023-03-31 00:22:08,975 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-03-31 00:22:08,976 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:22:08,976 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:22:08,981 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)
[2023-03-31 00:22:08,985 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-03-31 00:22:09,047 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-03-31 00:22:09,047 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-31 00:22:09,049 INFO  L262         TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core
[2023-03-31 00:22:09,050 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 00:22:09,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 00:22:09,248 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 00:22:09,738 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 00:22:09,738 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421478116] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 00:22:09,738 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-03-31 00:22:09,738 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20
[2023-03-31 00:22:09,739 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57403873]
[2023-03-31 00:22:09,739 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-03-31 00:22:09,739 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2023-03-31 00:22:09,739 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:22:09,740 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2023-03-31 00:22:09,740 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380
[2023-03-31 00:22:09,740 INFO  L87              Difference]: Start difference. First operand 45 states and 48 transitions. Second operand  has 20 states, 20 states have (on average 1.7) internal successors, (34), 17 states have internal predecessors, (34), 8 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-03-31 00:22:22,089 WARN  L223               SmtUtils]: Spent 11.50s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2023-03-31 00:22:24,193 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-03-31 00:22:32,462 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:22:32,462 INFO  L93              Difference]: Finished difference Result 64 states and 69 transitions.
[2023-03-31 00:22:32,463 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2023-03-31 00:22:32,463 INFO  L78                 Accepts]: Start accepts. Automaton has  has 20 states, 20 states have (on average 1.7) internal successors, (34), 17 states have internal predecessors, (34), 8 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30
[2023-03-31 00:22:32,463 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:22:32,464 INFO  L225             Difference]: With dead ends: 64
[2023-03-31 00:22:32,464 INFO  L226             Difference]: Without dead ends: 62
[2023-03-31 00:22:32,465 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482
[2023-03-31 00:22:32,465 INFO  L413           NwaCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time
[2023-03-31 00:22:32,465 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 57 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time]
[2023-03-31 00:22:32,466 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2023-03-31 00:22:32,486 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61.
[2023-03-31 00:22:32,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 61 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2023-03-31 00:22:32,488 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions.
[2023-03-31 00:22:32,488 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 30
[2023-03-31 00:22:32,488 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:22:32,488 INFO  L495      AbstractCegarLoop]: Abstraction has 61 states and 66 transitions.
[2023-03-31 00:22:32,489 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 20 states, 20 states have (on average 1.7) internal successors, (34), 17 states have internal predecessors, (34), 8 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-03-31 00:22:32,489 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions.
[2023-03-31 00:22:32,490 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2023-03-31 00:22:32,490 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:32,490 INFO  L195           NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:32,497 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2023-03-31 00:22:32,696 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:22:32,696 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:32,696 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:32,696 INFO  L85        PathProgramCache]: Analyzing trace with hash -1941486038, now seen corresponding path program 3 times
[2023-03-31 00:22:32,696 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:32,697 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765587645]
[2023-03-31 00:22:32,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:32,697 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:32,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,457 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:33,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,460 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-03-31 00:22:33,461 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,465 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18
[2023-03-31 00:22:33,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,483 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26
[2023-03-31 00:22:33,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,491 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34
[2023-03-31 00:22:33,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,500 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42
[2023-03-31 00:22:33,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:33,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2023-03-31 00:22:33,508 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:33,508 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765587645]
[2023-03-31 00:22:33,510 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765587645] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:22:33,511 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316936518]
[2023-03-31 00:22:33,511 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-03-31 00:22:33,511 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:22:33,511 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:22:33,513 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)
[2023-03-31 00:22:33,517 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-03-31 00:22:37,732 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2023-03-31 00:22:37,732 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-31 00:22:37,734 INFO  L262         TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 45 conjunts are in the unsatisfiable core
[2023-03-31 00:22:37,738 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 00:22:42,492 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked.
[2023-03-31 00:22:42,492 INFO  L327         TraceCheckSpWp]: Computing backward predicates...