./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-120.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:35,975 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:36,063 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c0893f-dba9-4a69-b3fa-77cb2ae181ee/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:36,074 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:36,075 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:36,114 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:36,115 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:36,116 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:36,117 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:36,118 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:36,118 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:36,119 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:36,120 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:36,120 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:36,120 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:36,120 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:36,120 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:36,121 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:36,121 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:36,121 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:36,121 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:36,121 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:36,122 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:36,122 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:36,122 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:36,123 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:36,123 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:36,475 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:36,485 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:36,489 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:36,490 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:36,492 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:36,494 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c0893f-dba9-4a69-b3fa-77cb2ae181ee/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-120.smt2
[2025-04-28 21:21:36,496 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:36,500 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:36,682 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2c0893f-dba9-4a69-b3fa-77cb2ae181ee/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-120.smt2
[2025-04-28 21:21:36,686 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:36,688 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:36,689 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:36,690 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:36,690 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:36,695 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,721 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36 Unit
[2025-04-28 21:21:36,722 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:36,724 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:36,724 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:36,724 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:36,741 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,741 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,767 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,770 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,772 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,772 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,775 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,776 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,776 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,792 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:36,794 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:36,795 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:36,795 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:36,796 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,799 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:36,816 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:36,830 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 21:21:36,835 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 21:21:36,851 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:36,851 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:36,851 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:36,852 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure itp given in one single declaration
[2025-04-28 21:21:36,852 INFO  L130     BoogieDeclarations]: Found specification of procedure itp
[2025-04-28 21:21:36,852 INFO  L138     BoogieDeclarations]: Found implementation of procedure itp
[2025-04-28 21:21:36,852 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:36,852 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:36,852 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:36,901 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:36,904 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:36,992 INFO  L?                        ?]: Removed 1 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:36,992 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:37,008 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:37,010 INFO  L312             CfgBuilder]: Removed 0 assume(true) statements.
[2025-04-28 21:21:37,010 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:37 BoogieIcfgContainer
[2025-04-28 21:21:37,011 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:37,015 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:37,016 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:37,020 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:37,020 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:36" (1/3) ...
[2025-04-28 21:21:37,022 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e2f7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:37, skipping insertion in model container
[2025-04-28 21:21:37,022 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (2/3) ...
[2025-04-28 21:21:37,022 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e2f7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:37, skipping insertion in model container
[2025-04-28 21:21:37,022 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:37" (3/3) ...
[2025-04-28 21:21:37,024 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:37,043 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:37,046 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 3 procedures, 13 locations, 17 edges, 3 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:37,104 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:37,124 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;@3670f015, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:37,126 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:37,130 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2025-04-28 21:21:37,139 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:37,139 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:37,139 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:37,141 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:37,146 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:37,147 INFO  L85        PathProgramCache]: Analyzing trace with hash -1672547219, now seen corresponding path program 1 times
[2025-04-28 21:21:37,155 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:37,156 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854962141]
[2025-04-28 21:21:37,156 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:37,158 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:37,189 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:37,212 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:37,213 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:37,213 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:37,412 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 21:21:37,413 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:37,414 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854962141]
[2025-04-28 21:21:37,414 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854962141] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:37,414 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:37,417 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:37,419 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086482298]
[2025-04-28 21:21:37,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:37,426 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:37,426 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:37,458 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:37,458 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:37,461 INFO  L87              Difference]: Start difference. First operand  has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:37,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:37,505 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2025-04-28 21:21:37,507 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:37,508 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 9
[2025-04-28 21:21:37,509 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:37,517 INFO  L225             Difference]: With dead ends: 13
[2025-04-28 21:21:37,518 INFO  L226             Difference]: Without dead ends: 13
[2025-04-28 21:21:37,520 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 21:21:37,524 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 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 21:21:37,526 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:37,542 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2025-04-28 21:21:37,572 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2025-04-28 21:21:37,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:37,579 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2025-04-28 21:21:37,582 INFO  L79                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2025-04-28 21:21:37,583 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:37,583 INFO  L485      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2025-04-28 21:21:37,583 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:37,583 INFO  L278                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2025-04-28 21:21:37,584 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2025-04-28 21:21:37,585 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:37,585 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:37,586 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:37,587 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:37,588 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:37,588 INFO  L85        PathProgramCache]: Analyzing trace with hash 13498287, now seen corresponding path program 1 times
[2025-04-28 21:21:37,589 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:37,589 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701805399]
[2025-04-28 21:21:37,589 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:37,589 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:37,602 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:37,627 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:37,631 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:37,631 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:38,130 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 21:21:38,131 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:38,131 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701805399]
[2025-04-28 21:21:38,131 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701805399] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:38,131 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230631947]
[2025-04-28 21:21:38,131 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:38,131 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:38,138 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:38,146 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 21:21:38,149 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:38,181 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:38,193 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:38,193 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:38,194 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:38,196 INFO  L256         TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 19 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:38,201 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:38,429 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 21:21:38,429 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:39,377 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 21:21:39,378 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230631947] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:39,378 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:39,378 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10
[2025-04-28 21:21:39,379 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060026209]
[2025-04-28 21:21:39,379 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:39,380 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2025-04-28 21:21:39,380 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:39,381 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2025-04-28 21:21:39,381 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:39,381 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 10 states, 6 states have (on average 2.0) internal successors, (12), 9 states have internal predecessors, (12), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7)
[2025-04-28 21:21:39,460 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:39,460 INFO  L93              Difference]: Finished difference Result 15 states and 16 transitions.
[2025-04-28 21:21:39,463 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:39,463 INFO  L79                 Accepts]: Start accepts. Automaton has  has 10 states, 6 states have (on average 2.0) internal successors, (12), 9 states have internal predecessors, (12), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 13
[2025-04-28 21:21:39,463 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:39,464 INFO  L225             Difference]: With dead ends: 15
[2025-04-28 21:21:39,464 INFO  L226             Difference]: Without dead ends: 15
[2025-04-28 21:21:39,464 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:39,465 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 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 21:21:39,465 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:39,466 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2025-04-28 21:21:39,470 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2025-04-28 21:21:39,470 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:39,471 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2025-04-28 21:21:39,472 INFO  L79                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13
[2025-04-28 21:21:39,472 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:39,473 INFO  L485      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2025-04-28 21:21:39,473 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 6 states have (on average 2.0) internal successors, (12), 9 states have internal predecessors, (12), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7)
[2025-04-28 21:21:39,474 INFO  L278                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2025-04-28 21:21:39,474 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2025-04-28 21:21:39,474 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:39,474 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:39,480 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:39,679 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:39,680 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:39,680 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:39,680 INFO  L85        PathProgramCache]: Analyzing trace with hash -1177266959, now seen corresponding path program 2 times
[2025-04-28 21:21:39,680 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:39,680 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251341432]
[2025-04-28 21:21:39,681 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:39,681 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:39,687 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:39,710 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:39,713 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:39,713 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,185 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 21:21:40,185 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:40,185 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251341432]
[2025-04-28 21:21:40,186 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251341432] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:40,186 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471063971]
[2025-04-28 21:21:40,186 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:40,186 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:40,189 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:40,191 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 21:21:40,195 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:40,231 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:40,247 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:40,247 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:40,247 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,248 WARN  L254         TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 28 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:40,251 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:40,585 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 21:21:40,586 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:42,196 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 21:21:42,196 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [471063971] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:42,196 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:42,196 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15
[2025-04-28 21:21:42,196 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198976897]
[2025-04-28 21:21:42,196 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:42,197 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2025-04-28 21:21:42,197 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:42,197 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2025-04-28 21:21:42,198 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210
[2025-04-28 21:21:42,198 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 15 states, 8 states have (on average 2.125) internal successors, (17), 14 states have internal predecessors, (17), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10)
[2025-04-28 21:21:42,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:42,541 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2025-04-28 21:21:42,542 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:42,542 INFO  L79                 Accepts]: Start accepts. Automaton has  has 15 states, 8 states have (on average 2.125) internal successors, (17), 14 states have internal predecessors, (17), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) Word has length 17
[2025-04-28 21:21:42,542 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:42,543 INFO  L225             Difference]: With dead ends: 21
[2025-04-28 21:21:42,544 INFO  L226             Difference]: Without dead ends: 21
[2025-04-28 21:21:42,544 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:42,547 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:42,547 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:42,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2025-04-28 21:21:42,555 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2025-04-28 21:21:42,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8)
[2025-04-28 21:21:42,556 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2025-04-28 21:21:42,557 INFO  L79                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17
[2025-04-28 21:21:42,557 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:42,557 INFO  L485      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2025-04-28 21:21:42,557 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 8 states have (on average 2.125) internal successors, (17), 14 states have internal predecessors, (17), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10)
[2025-04-28 21:21:42,557 INFO  L278                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2025-04-28 21:21:42,558 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2025-04-28 21:21:42,559 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:42,559 INFO  L218           NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:42,565 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:42,760 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:42,760 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:42,760 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:42,760 INFO  L85        PathProgramCache]: Analyzing trace with hash 1866336439, now seen corresponding path program 3 times
[2025-04-28 21:21:42,761 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:42,761 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245074403]
[2025-04-28 21:21:42,761 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:42,761 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:42,767 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 6 equivalence classes.
[2025-04-28 21:21:42,843 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:21:42,843 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2025-04-28 21:21:42,844 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,622 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2025-04-28 21:21:45,622 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:45,622 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245074403]
[2025-04-28 21:21:45,622 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245074403] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:45,622 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466498259]
[2025-04-28 21:21:45,622 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:45,623 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:45,625 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:45,627 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:45,632 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:45,675 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 6 equivalence classes.
[2025-04-28 21:21:45,709 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:21:45,709 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2025-04-28 21:21:45,709 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,711 WARN  L254         TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 51 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:45,718 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:47,207 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2025-04-28 21:21:47,207 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:54,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2025-04-28 21:21:54,168 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466498259] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:54,168 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:54,169 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 29
[2025-04-28 21:21:54,169 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542787842]
[2025-04-28 21:21:54,169 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:54,169 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2025-04-28 21:21:54,169 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:54,170 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2025-04-28 21:21:54,171 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812
[2025-04-28 21:21:54,171 INFO  L87              Difference]: Start difference. First operand 21 states and 22 transitions. Second operand  has 29 states, 15 states have (on average 2.066666666666667) internal successors, (31), 28 states have internal predecessors, (31), 15 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19)
[2025-04-28 21:22:00,077 WARN  L532   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]
