./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-280.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:23,363 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:23,472 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b783dfec-1e10-450c-b8f7-1a42a231c19b/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:23,480 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:23,481 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:23,525 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:23,525 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:23,526 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:23,527 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:23,527 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:23,528 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:23,528 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:23,528 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:23,528 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:23,529 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:23,529 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:23,530 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:23,531 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:23,531 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:23,532 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:23,533 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:23,935 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:23,948 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:23,951 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:23,954 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:23,955 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:23,956 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b783dfec-1e10-450c-b8f7-1a42a231c19b/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-280.smt2
[2025-04-28 21:21:23,960 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:23,968 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:24,169 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b783dfec-1e10-450c-b8f7-1a42a231c19b/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-280.smt2
[2025-04-28 21:21:24,173 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:24,176 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:24,177 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:24,177 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:24,177 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:24,182 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,210 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24 Unit
[2025-04-28 21:21:24,210 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:24,211 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:24,213 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:24,213 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:24,231 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,231 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,264 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,265 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,267 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,268 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,270 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,271 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,272 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,287 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:24,290 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:24,291 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:24,291 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:24,292 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (1/1) ...
[2025-04-28 21:21:24,295 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:24,314 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:24,330 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2025-04-28 21:21:24,336 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2025-04-28 21:21:24,354 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:24,354 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:24,354 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:24,354 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure fail given in one single declaration
[2025-04-28 21:21:24,355 INFO  L130     BoogieDeclarations]: Found specification of procedure fail
[2025-04-28 21:21:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure fail
[2025-04-28 21:21:24,355 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure inv given in one single declaration
[2025-04-28 21:21:24,355 INFO  L130     BoogieDeclarations]: Found specification of procedure inv
[2025-04-28 21:21:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure inv
[2025-04-28 21:21:24,355 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:24,355 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:24,405 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:24,408 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:24,472 INFO  L?                        ?]: Removed 0 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:24,472 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:24,489 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:24,490 INFO  L312             CfgBuilder]: Removed 1 assume(true) statements.
[2025-04-28 21:21:24,490 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:24 BoogieIcfgContainer
[2025-04-28 21:21:24,491 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:24,495 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:24,496 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:24,501 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:24,502 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:24" (1/3) ...
[2025-04-28 21:21:24,503 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30cc3894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:24, skipping insertion in model container
[2025-04-28 21:21:24,503 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:24" (2/3) ...
[2025-04-28 21:21:24,504 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30cc3894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:24, skipping insertion in model container
[2025-04-28 21:21:24,505 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:24" (3/3) ...
[2025-04-28 21:21:24,507 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:24,531 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:24,534 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 4 procedures, 16 locations, 21 edges, 4 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:24,584 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:24,598 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@3958dcd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:24,598 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:24,603 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 16 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 9 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2025-04-28 21:21:24,611 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2025-04-28 21:21:24,611 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:24,612 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:24,613 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:24,619 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:24,620 INFO  L85        PathProgramCache]: Analyzing trace with hash -121084841, now seen corresponding path program 1 times
[2025-04-28 21:21:24,629 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:24,630 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577611969]
[2025-04-28 21:21:24,630 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:24,631 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:24,660 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes.
[2025-04-28 21:21:24,676 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements.
[2025-04-28 21:21:24,676 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:24,676 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:24,789 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:24,789 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:24,789 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577611969]
[2025-04-28 21:21:24,792 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577611969] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:24,792 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:24,797 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:24,799 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127910270]
[2025-04-28 21:21:24,801 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:24,807 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:24,808 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:24,844 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:24,847 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:24,849 INFO  L87              Difference]: Start difference. First operand  has 16 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 9 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:24,908 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:24,908 INFO  L93              Difference]: Finished difference Result 16 states and 17 transitions.
[2025-04-28 21:21:24,913 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:24,914 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 12
[2025-04-28 21:21:24,915 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:24,921 INFO  L225             Difference]: With dead ends: 16
[2025-04-28 21:21:24,921 INFO  L226             Difference]: Without dead ends: 16
[2025-04-28 21:21:24,923 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:24,929 INFO  L437           NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:24,932 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:24,950 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2025-04-28 21:21:24,974 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2025-04-28 21:21:24,975 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2025-04-28 21:21:24,979 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions.
[2025-04-28 21:21:24,981 INFO  L79                 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12
[2025-04-28 21:21:24,981 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:24,981 INFO  L485      AbstractCegarLoop]: Abstraction has 16 states and 17 transitions.
[2025-04-28 21:21:24,981 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:24,982 INFO  L278                IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions.
[2025-04-28 21:21:24,983 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2025-04-28 21:21:24,983 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:24,983 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:24,984 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:24,984 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:24,985 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:24,985 INFO  L85        PathProgramCache]: Analyzing trace with hash -2109633831, now seen corresponding path program 1 times
[2025-04-28 21:21:24,985 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:24,985 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871153314]
[2025-04-28 21:21:24,985 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:24,986 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:24,999 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes.
[2025-04-28 21:21:25,032 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements.
[2025-04-28 21:21:25,032 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:25,033 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:25,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:25,461 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:25,461 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871153314]
[2025-04-28 21:21:25,462 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871153314] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:25,462 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331625242]
[2025-04-28 21:21:25,462 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:25,462 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:25,469 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:25,472 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:25,475 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:25,557 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes.
[2025-04-28 21:21:25,569 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements.
[2025-04-28 21:21:25,570 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:25,570 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:25,572 INFO  L256         TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:25,578 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:25,842 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:25,842 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:26,434 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:26,436 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [331625242] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:26,437 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:26,437 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9
[2025-04-28 21:21:26,438 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356516118]
[2025-04-28 21:21:26,438 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:26,438 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2025-04-28 21:21:26,439 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:26,440 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2025-04-28 21:21:26,441 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:26,441 INFO  L87              Difference]: Start difference. First operand 16 states and 17 transitions. Second operand  has 9 states, 4 states have (on average 2.75) internal successors, (11), 8 states have internal predecessors, (11), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7)
[2025-04-28 21:21:26,534 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:26,535 INFO  L93              Difference]: Finished difference Result 18 states and 19 transitions.
[2025-04-28 21:21:26,535 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:26,535 INFO  L79                 Accepts]: Start accepts. Automaton has  has 9 states, 4 states have (on average 2.75) internal successors, (11), 8 states have internal predecessors, (11), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) Word has length 16
[2025-04-28 21:21:26,536 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:26,536 INFO  L225             Difference]: With dead ends: 18
[2025-04-28 21:21:26,536 INFO  L226             Difference]: Without dead ends: 18
[2025-04-28 21:21:26,537 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:26,538 INFO  L437           NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:26,538 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 64 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:26,539 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2025-04-28 21:21:26,541 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2025-04-28 21:21:26,541 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6)
[2025-04-28 21:21:26,546 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2025-04-28 21:21:26,546 INFO  L79                 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16
[2025-04-28 21:21:26,546 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:26,546 INFO  L485      AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2025-04-28 21:21:26,546 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 4 states have (on average 2.75) internal successors, (11), 8 states have internal predecessors, (11), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7)
[2025-04-28 21:21:26,546 INFO  L278                IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2025-04-28 21:21:26,547 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2025-04-28 21:21:26,547 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:26,547 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:26,554 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:26,752 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:26,752 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:26,753 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:26,753 INFO  L85        PathProgramCache]: Analyzing trace with hash -1008473509, now seen corresponding path program 2 times
[2025-04-28 21:21:26,753 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:26,753 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051343690]
[2025-04-28 21:21:26,753 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:26,753 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:26,759 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes.
[2025-04-28 21:21:26,771 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements.
[2025-04-28 21:21:26,772 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:26,772 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:27,177 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:27,177 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:27,177 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051343690]
[2025-04-28 21:21:27,177 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051343690] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:27,177 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234602611]
[2025-04-28 21:21:27,177 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:27,177 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:27,181 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:27,183 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:27,186 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:27,228 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes.
[2025-04-28 21:21:27,246 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements.
[2025-04-28 21:21:27,247 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:27,247 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:27,248 INFO  L256         TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:27,250 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:27,586 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:27,586 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:28,693 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:28,693 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [234602611] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:28,694 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:28,694 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15
[2025-04-28 21:21:28,694 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255210011]
[2025-04-28 21:21:28,694 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:28,695 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2025-04-28 21:21:28,696 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:28,698 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2025-04-28 21:21:28,698 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210
[2025-04-28 21:21:28,699 INFO  L87              Difference]: Start difference. First operand 18 states and 19 transitions. Second operand  has 15 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11)
[2025-04-28 21:21:28,831 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:28,831 INFO  L93              Difference]: Finished difference Result 14 states and 15 transitions.
[2025-04-28 21:21:28,832 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:21:28,832 INFO  L79                 Accepts]: Start accepts. Automaton has  has 15 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) Word has length 20
[2025-04-28 21:21:28,833 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:28,833 INFO  L225             Difference]: With dead ends: 14
[2025-04-28 21:21:28,833 INFO  L226             Difference]: Without dead ends: 0
[2025-04-28 21:21:28,833 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306
[2025-04-28 21:21:28,834 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:28,835 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:28,835 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2025-04-28 21:21:28,835 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2025-04-28 21:21:28,836 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2025-04-28 21:21:28,836 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2025-04-28 21:21:28,836 INFO  L79                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20
[2025-04-28 21:21:28,836 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:28,836 INFO  L485      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2025-04-28 21:21:28,836 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11)
[2025-04-28 21:21:28,836 INFO  L278                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2025-04-28 21:21:28,837 INFO  L284                IsEmpty]: Finished isEmpty. No accepting run.
[2025-04-28 21:21:28,840 INFO  L790   garLoopResultBuilder]: Registering result SAFE for location Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY (0 of 1 remaining)
[2025-04-28 21:21:28,846 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:29,041 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:29,045 INFO  L422         BasicCegarLoop]: Path program histogram: [2, 1]
[2025-04-28 21:21:29,047 INFO  L171   ceAbstractionStarter]: Computing trace abstraction results
[2025-04-28 21:21:29,052 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 09:21:29 BoogieIcfgContainer
[2025-04-28 21:21:29,052 INFO  L131        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2025-04-28 21:21:29,056 INFO  L158              Benchmark]: Toolchain (without parser) took 4877.33ms. Allocated memory was 234.9MB in the beginning and 167.8MB in the end (delta: -67.1MB). Free memory was 165.7MB in the beginning and 82.5MB in the end (delta: 83.2MB). Peak memory consumption was 34.4MB. Max. memory is 33.6GB.
[2025-04-28 21:21:29,056 INFO  L158              Benchmark]: SmtParser took 2.56ms. Allocated memory is still 234.9MB. Free memory is still 172.2MB. There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:29,056 INFO  L158              Benchmark]: ChcToBoogie took 33.72ms. Allocated memory is still 234.9MB. Free memory was 165.7MB in the beginning and 164.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:29,057 INFO  L158              Benchmark]: Boogie Preprocessor took 77.27ms. Allocated memory is still 234.9MB. Free memory was 164.4MB in the beginning and 162.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:29,057 INFO  L158              Benchmark]: RCFGBuilder took 200.89ms. Allocated memory is still 234.9MB. Free memory was 162.3MB in the beginning and 155.3MB in the end (delta: 7.0MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:29,057 INFO  L158              Benchmark]: TraceAbstraction took 4557.06ms. Allocated memory was 234.9MB in the beginning and 167.8MB in the end (delta: -67.1MB). Free memory was 154.7MB in the beginning and 82.5MB in the end (delta: 72.1MB). Peak memory consumption was 34.4MB. Max. memory is 33.6GB.
[2025-04-28 21:21:29,059 INFO  L338   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * SmtParser took 2.56ms. Allocated memory is still 234.9MB. Free memory is still 172.2MB. There was no memory consumed. Max. memory is 33.6GB.
 * ChcToBoogie took 33.72ms. Allocated memory is still 234.9MB. Free memory was 165.7MB in the beginning and 164.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 33.6GB.
 * Boogie Preprocessor took 77.27ms. Allocated memory is still 234.9MB. Free memory was 164.4MB in the beginning and 162.3MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 33.6GB.
 * RCFGBuilder took 200.89ms. Allocated memory is still 234.9MB. Free memory was 162.3MB in the beginning and 155.3MB in the end (delta: 7.0MB). There was no memory consumed. Max. memory is 33.6GB.
 * TraceAbstraction took 4557.06ms. Allocated memory was 234.9MB in the beginning and 167.8MB in the end (delta: -67.1MB). Free memory was 154.7MB in the beginning and 82.5MB in the end (delta: 72.1MB). Peak memory consumption was 34.4MB. Max. memory is 33.6GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - PositiveResult [Unknown line] : the set of constraint Horn clauses is satisfiable
    For all program executions holds that the set of constraint Horn clauses is satisfiable at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 16 locations, 21 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 145 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65 IncrementalHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 39 mSDtfsCounter, 65 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 465 SizeOfPredicates, 12 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 13/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2025-04-28 21:21:29,082 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...
sat
