./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-129.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:38,222 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:38,298 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b08321-41d3-4a1c-8cb7-3d00a08a4403/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:38,304 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:38,304 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:38,333 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:38,334 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:38,334 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:38,334 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:38,334 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:38,335 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:38,335 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:38,335 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:38,335 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:38,335 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:38,336 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:38,336 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:38,336 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:38,336 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:38,336 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:38,336 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:38,336 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:38,337 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:38,337 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:38,337 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:38,338 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:38,338 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:38,675 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:38,686 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:38,689 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:38,692 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:38,693 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:38,694 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b08321-41d3-4a1c-8cb7-3d00a08a4403/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-129.smt2
[2025-04-28 21:21:38,697 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:38,701 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:38,863 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b08321-41d3-4a1c-8cb7-3d00a08a4403/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-129.smt2
[2025-04-28 21:21:38,870 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:38,872 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:38,873 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:38,873 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:38,873 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:38,875 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,898 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38 Unit
[2025-04-28 21:21:38,898 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:38,899 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:38,899 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:38,899 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:38,916 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,916 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,947 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,948 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,952 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,953 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,955 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,960 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,961 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,980 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:38,981 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:38,981 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:38,981 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:38,982 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,985 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:38,997 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:39,010 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 21:21:39,014 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 21:21:39,029 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:39,030 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:39,030 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:39,030 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure .DLRinnerFunc.CLN2.DSHf.DLRunknown.CLN7 given in one single declaration
[2025-04-28 21:21:39,030 INFO  L130     BoogieDeclarations]: Found specification of procedure .DLRinnerFunc.CLN2.DSHf.DLRunknown.CLN7
[2025-04-28 21:21:39,030 INFO  L138     BoogieDeclarations]: Found implementation of procedure .DLRinnerFunc.CLN2.DSHf.DLRunknown.CLN7
[2025-04-28 21:21:39,030 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure cps_sum.DLRunknown.CLN10 given in one single declaration
[2025-04-28 21:21:39,030 INFO  L130     BoogieDeclarations]: Found specification of procedure cps_sum.DLRunknown.CLN10
[2025-04-28 21:21:39,031 INFO  L138     BoogieDeclarations]: Found implementation of procedure cps_sum.DLRunknown.CLN10
[2025-04-28 21:21:39,031 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure .DLRinnerFunc.CLN1.DSHf.DLRunknown.CLN2 given in one single declaration
[2025-04-28 21:21:39,031 INFO  L130     BoogieDeclarations]: Found specification of procedure .DLRinnerFunc.CLN1.DSHf.DLRunknown.CLN2
[2025-04-28 21:21:39,031 INFO  L138     BoogieDeclarations]: Found implementation of procedure .DLRinnerFunc.CLN1.DSHf.DLRunknown.CLN2
[2025-04-28 21:21:39,031 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure .DLRinnerFunc.CLN1.DSHf.DLRunknown.CLN4 given in one single declaration
[2025-04-28 21:21:39,031 INFO  L130     BoogieDeclarations]: Found specification of procedure .DLRinnerFunc.CLN1.DSHf.DLRunknown.CLN4
[2025-04-28 21:21:39,031 INFO  L138     BoogieDeclarations]: Found implementation of procedure .DLRinnerFunc.CLN1.DSHf.DLRunknown.CLN4
[2025-04-28 21:21:39,031 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure cps_sum.DLRunknown.CLN9 given in one single declaration
[2025-04-28 21:21:39,031 INFO  L130     BoogieDeclarations]: Found specification of procedure cps_sum.DLRunknown.CLN9
[2025-04-28 21:21:39,031 INFO  L138     BoogieDeclarations]: Found implementation of procedure cps_sum.DLRunknown.CLN9
[2025-04-28 21:21:39,032 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:39,035 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:39,035 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:39,099 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:39,104 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:39,267 INFO  L?                        ?]: Removed 5 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:39,267 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:39,284 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:39,285 INFO  L312             CfgBuilder]: Removed 2 assume(true) statements.
[2025-04-28 21:21:39,286 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:39 BoogieIcfgContainer
[2025-04-28 21:21:39,286 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:39,290 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:39,291 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:39,298 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:39,300 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:38" (1/3) ...
[2025-04-28 21:21:39,300 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd1fdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:39, skipping insertion in model container
[2025-04-28 21:21:39,301 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (2/3) ...
[2025-04-28 21:21:39,301 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd1fdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:39, skipping insertion in model container
[2025-04-28 21:21:39,301 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:39" (3/3) ...
[2025-04-28 21:21:39,303 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:39,324 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:39,328 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 7 procedures, 31 locations, 46 edges, 7 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:39,378 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:39,404 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;@102aaf10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:39,405 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:39,414 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 31 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 16 states have internal predecessors, (16), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2025-04-28 21:21:39,425 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2025-04-28 21:21:39,426 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:39,427 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:39,427 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:39,434 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:39,436 INFO  L85        PathProgramCache]: Analyzing trace with hash 1376833319, now seen corresponding path program 1 times
[2025-04-28 21:21:39,446 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:39,447 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031434671]
[2025-04-28 21:21:39,447 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:39,448 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:39,484 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes.
[2025-04-28 21:21:39,512 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements.
[2025-04-28 21:21:39,512 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:39,512 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,744 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 21:21:39,746 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:39,747 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031434671]
[2025-04-28 21:21:39,748 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031434671] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:39,748 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:39,752 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2025-04-28 21:21:39,756 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219151697]
[2025-04-28 21:21:39,757 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:39,762 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2025-04-28 21:21:39,763 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:39,799 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2025-04-28 21:21:39,800 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2025-04-28 21:21:39,802 INFO  L87              Difference]: Start difference. First operand  has 31 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 16 states have internal predecessors, (16), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Second operand  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:39,870 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:39,871 INFO  L93              Difference]: Finished difference Result 33 states and 38 transitions.
[2025-04-28 21:21:39,872 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2025-04-28 21:21:39,874 INFO  L79                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 16
[2025-04-28 21:21:39,875 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:39,883 INFO  L225             Difference]: With dead ends: 33
[2025-04-28 21:21:39,883 INFO  L226             Difference]: Without dead ends: 31
[2025-04-28 21:21:39,886 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2025-04-28 21:21:39,892 INFO  L437           NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:39,894 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 120 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:39,912 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2025-04-28 21:21:39,984 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2025-04-28 21:21:39,987 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11)
[2025-04-28 21:21:39,994 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions.
[2025-04-28 21:21:39,996 INFO  L79                 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16
[2025-04-28 21:21:39,996 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:39,997 INFO  L485      AbstractCegarLoop]: Abstraction has 31 states and 36 transitions.
[2025-04-28 21:21:39,997 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:39,997 INFO  L278                IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions.
[2025-04-28 21:21:39,999 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2025-04-28 21:21:39,999 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:40,000 INFO  L218           NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:40,001 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:40,002 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:40,004 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:40,004 INFO  L85        PathProgramCache]: Analyzing trace with hash -2063189808, now seen corresponding path program 1 times
[2025-04-28 21:21:40,004 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:40,004 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069525660]
[2025-04-28 21:21:40,004 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:40,005 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:40,027 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes.
[2025-04-28 21:21:40,064 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements.
[2025-04-28 21:21:40,064 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:40,064 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,529 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2025-04-28 21:21:40,531 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:40,531 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069525660]
[2025-04-28 21:21:40,531 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069525660] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:40,531 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744858228]
[2025-04-28 21:21:40,532 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:40,532 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:40,535 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:40,541 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 21:21:40,543 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:40,599 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes.
[2025-04-28 21:21:40,631 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements.
[2025-04-28 21:21:40,631 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:40,632 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,634 INFO  L256         TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:40,642 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:40,784 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2025-04-28 21:21:40,784 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:42,363 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2025-04-28 21:21:42,363 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744858228] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:42,363 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:42,363 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10
[2025-04-28 21:21:42,364 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747307518]
[2025-04-28 21:21:42,364 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:42,365 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2025-04-28 21:21:42,365 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:42,366 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2025-04-28 21:21:42,368 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:42,369 INFO  L87              Difference]: Start difference. First operand 31 states and 36 transitions. Second operand  has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10)
[2025-04-28 21:21:42,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:42,509 INFO  L93              Difference]: Finished difference Result 39 states and 44 transitions.
[2025-04-28 21:21:42,509 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:42,510 INFO  L79                 Accepts]: Start accepts. Automaton has  has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 36
[2025-04-28 21:21:42,510 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:42,511 INFO  L225             Difference]: With dead ends: 39
[2025-04-28 21:21:42,511 INFO  L226             Difference]: Without dead ends: 37
[2025-04-28 21:21:42,512 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:42,513 INFO  L437           NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:42,515 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 222 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:42,516 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2025-04-28 21:21:42,522 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2025-04-28 21:21:42,523 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14)
[2025-04-28 21:21:42,524 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions.
[2025-04-28 21:21:42,524 INFO  L79                 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 36
[2025-04-28 21:21:42,524 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:42,524 INFO  L485      AbstractCegarLoop]: Abstraction has 37 states and 42 transitions.
[2025-04-28 21:21:42,524 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10)
[2025-04-28 21:21:42,525 INFO  L278                IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions.
[2025-04-28 21:21:42,529 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2025-04-28 21:21:42,529 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:42,529 INFO  L218           NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:42,535 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:42,733 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:42,734 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:42,734 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:42,734 INFO  L85        PathProgramCache]: Analyzing trace with hash 1170217913, now seen corresponding path program 2 times
[2025-04-28 21:21:42,734 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:42,735 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622128375]
[2025-04-28 21:21:42,735 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:42,735 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:42,743 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes.
[2025-04-28 21:21:42,764 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements.
[2025-04-28 21:21:42,765 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:42,765 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:43,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked.
[2025-04-28 21:21:43,256 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:43,256 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622128375]
[2025-04-28 21:21:43,256 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622128375] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:43,256 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059206878]
[2025-04-28 21:21:43,257 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:43,257 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:43,260 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:43,263 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 21:21:43,267 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:43,335 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes.
[2025-04-28 21:21:43,375 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements.
[2025-04-28 21:21:43,376 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:43,376 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:43,381 INFO  L256         TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:43,385 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:43,581 INFO  L134       CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked.
[2025-04-28 21:21:43,581 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:47,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked.
[2025-04-28 21:21:47,957 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059206878] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:47,957 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:47,957 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 20
[2025-04-28 21:21:47,957 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436889051]
[2025-04-28 21:21:47,957 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:47,958 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2025-04-28 21:21:47,958 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:47,959 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2025-04-28 21:21:47,959 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380
[2025-04-28 21:21:47,960 INFO  L87              Difference]: Start difference. First operand 37 states and 42 transitions. Second operand  has 20 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 20 states have internal predecessors, (25), 10 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 15 states have call predecessors, (22), 10 states have call successors, (22)
[2025-04-28 21:21:48,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:48,210 INFO  L93              Difference]: Finished difference Result 33 states and 38 transitions.
[2025-04-28 21:21:48,211 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2025-04-28 21:21:48,211 INFO  L79                 Accepts]: Start accepts. Automaton has  has 20 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 20 states have internal predecessors, (25), 10 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 15 states have call predecessors, (22), 10 states have call successors, (22) Word has length 56
[2025-04-28 21:21:48,211 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:48,212 INFO  L225             Difference]: With dead ends: 33
[2025-04-28 21:21:48,212 INFO  L226             Difference]: Without dead ends: 0
[2025-04-28 21:21:48,212 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600
[2025-04-28 21:21:48,213 INFO  L437           NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:48,214 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 342 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:48,214 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2025-04-28 21:21:48,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2025-04-28 21:21:48,215 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 21:21:48,215 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2025-04-28 21:21:48,215 INFO  L79                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56
[2025-04-28 21:21:48,215 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:48,215 INFO  L485      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2025-04-28 21:21:48,216 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 20 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 20 states have internal predecessors, (25), 10 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 15 states have call predecessors, (22), 10 states have call successors, (22)
[2025-04-28 21:21:48,216 INFO  L278                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2025-04-28 21:21:48,216 INFO  L284                IsEmpty]: Finished isEmpty. No accepting run.
[2025-04-28 21:21:48,219 INFO  L790   garLoopResultBuilder]: Registering result SAFE for location Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY (0 of 1 remaining)
[2025-04-28 21:21:48,226 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:48,420 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:48,424 INFO  L422         BasicCegarLoop]: Path program histogram: [2, 1]
[2025-04-28 21:21:48,427 INFO  L171   ceAbstractionStarter]: Computing trace abstraction results
[2025-04-28 21:21:48,432 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 09:21:48 BoogieIcfgContainer
[2025-04-28 21:21:48,432 INFO  L131        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2025-04-28 21:21:48,433 INFO  L158              Benchmark]: Toolchain (without parser) took 9560.93ms. Allocated memory was 234.9MB in the beginning and 167.8MB in the end (delta: -67.1MB). Free memory was 164.9MB in the beginning and 111.5MB in the end (delta: 53.4MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:48,433 INFO  L158              Benchmark]: SmtParser took 1.43ms. Allocated memory is still 234.9MB. Free memory was 172.2MB in the beginning and 171.7MB in the end (delta: 587.2kB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:48,434 INFO  L158              Benchmark]: ChcToBoogie took 25.66ms. Allocated memory is still 234.9MB. Free memory was 164.9MB in the beginning and 163.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:48,434 INFO  L158              Benchmark]: Boogie Preprocessor took 80.99ms. Allocated memory is still 234.9MB. Free memory was 163.7MB in the beginning and 161.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:48,435 INFO  L158              Benchmark]: RCFGBuilder took 305.89ms. Allocated memory is still 234.9MB. Free memory was 161.9MB in the beginning and 152.9MB in the end (delta: 9.0MB). Peak memory consumption was 16.8MB. Max. memory is 33.6GB.
[2025-04-28 21:21:48,435 INFO  L158              Benchmark]: TraceAbstraction took 9142.26ms. Allocated memory was 234.9MB in the beginning and 167.8MB in the end (delta: -67.1MB). Free memory was 152.3MB in the beginning and 111.5MB in the end (delta: 40.8MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:48,437 INFO  L338   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * SmtParser took 1.43ms. Allocated memory is still 234.9MB. Free memory was 172.2MB in the beginning and 171.7MB in the end (delta: 587.2kB). There was no memory consumed. Max. memory is 33.6GB.
 * ChcToBoogie took 25.66ms. Allocated memory is still 234.9MB. Free memory was 164.9MB in the beginning and 163.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 33.6GB.
 * Boogie Preprocessor took 80.99ms. Allocated memory is still 234.9MB. Free memory was 163.7MB in the beginning and 161.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 33.6GB.
 * RCFGBuilder took 305.89ms. Allocated memory is still 234.9MB. Free memory was 161.9MB in the beginning and 152.9MB in the end (delta: 9.0MB). Peak memory consumption was 16.8MB. Max. memory is 33.6GB.
 * TraceAbstraction took 9142.26ms. Allocated memory was 234.9MB in the beginning and 167.8MB in the end (delta: -67.1MB). Free memory was 152.3MB in the beginning and 111.5MB in the end (delta: 40.8MB). There was no memory consumed. 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 7 procedures, 31 locations, 46 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.1s, OverallIterations: 3, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 684 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 592 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 160 IncrementalHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 92 mSDtfsCounter, 160 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 168 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=2, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 200 NumberOfCodeBlocks, 200 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 610 SizeOfPredicates, 8 NumberOfNonLiveVariables, 230 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 159/186 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 21:21:48,458 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
