./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-201.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:53,558 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:53,646 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef0fa025-a2a3-4007-ba36-826008aeca8c/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:53,655 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:53,658 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:53,695 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:53,696 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:53,696 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:53,696 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:53,696 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:53,697 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:53,697 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:53,697 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:53,697 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:53,697 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:53,697 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:53,697 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:53,698 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:53,698 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:53,702 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:53,702 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:54,031 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:54,042 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:54,045 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:54,048 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:54,049 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:54,050 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef0fa025-a2a3-4007-ba36-826008aeca8c/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-201.smt2
[2025-04-28 21:21:54,053 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:54,057 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:54,540 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef0fa025-a2a3-4007-ba36-826008aeca8c/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-201.smt2
[2025-04-28 21:21:54,543 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:54,545 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:54,546 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:54,546 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:54,546 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:54,549 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,604 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54 Unit
[2025-04-28 21:21:54,605 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:54,610 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:54,610 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:54,610 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:54,634 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,634 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,679 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,684 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,699 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,704 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,711 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,714 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,715 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,734 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:54,735 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:54,735 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:54,735 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:54,736 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (1/1) ...
[2025-04-28 21:21:54,739 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:54,758 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:54,776 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 21:21:54,780 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 21:21:54,795 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:54,796 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:54,796 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:54,796 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:54,796 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:54,796 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:54,796 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn__bar given in one single declaration
[2025-04-28 21:21:54,797 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn__bar
[2025-04-28 21:21:54,797 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn__bar
[2025-04-28 21:21:54,797 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn__bar given in one single declaration
[2025-04-28 21:21:54,797 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn__bar
[2025-04-28 21:21:54,798 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn__bar
[2025-04-28 21:21:54,798 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn given in one single declaration
[2025-04-28 21:21:54,798 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn
[2025-04-28 21:21:54,798 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn
[2025-04-28 21:21:54,798 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn given in one single declaration
[2025-04-28 21:21:54,798 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn
[2025-04-28 21:21:54,798 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn
[2025-04-28 21:21:54,798 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure lturn given in one single declaration
[2025-04-28 21:21:54,799 INFO  L130     BoogieDeclarations]: Found specification of procedure lturn
[2025-04-28 21:21:54,800 INFO  L138     BoogieDeclarations]: Found implementation of procedure lturn
[2025-04-28 21:21:54,800 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:54,800 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:54,800 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:54,896 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:54,901 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:55,562 INFO  L?                        ?]: Removed 4 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:55,562 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:55,586 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:55,586 INFO  L312             CfgBuilder]: Removed 12 assume(true) statements.
[2025-04-28 21:21:55,587 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:55 BoogieIcfgContainer
[2025-04-28 21:21:55,587 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:55,589 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:55,593 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:55,599 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:55,600 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:54" (1/3) ...
[2025-04-28 21:21:55,600 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b67d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:55, skipping insertion in model container
[2025-04-28 21:21:55,600 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:54" (2/3) ...
[2025-04-28 21:21:55,601 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b67d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:55, skipping insertion in model container
[2025-04-28 21:21:55,601 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:55" (3/3) ...
[2025-04-28 21:21:55,604 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:55,621 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:55,624 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 8 procedures, 150 locations, 449 edges, 8 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:55,670 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:55,682 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;@4bae4f25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:55,682 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:55,686 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 150 states, 13 states have (on average 2.923076923076923) internal successors, (38), 38 states have internal predecessors, (38), 131 states have call successors, (137), 7 states have call predecessors, (137), 7 states have return successors, (137), 105 states have call predecessors, (137), 131 states have call successors, (137)
[2025-04-28 21:21:55,722 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:55,725 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:55,726 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:55,726 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:55,731 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:55,731 INFO  L85        PathProgramCache]: Analyzing trace with hash -676941124, now seen corresponding path program 1 times
[2025-04-28 21:21:55,739 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:55,739 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854366169]
[2025-04-28 21:21:55,739 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:55,740 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:55,794 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:55,949 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:55,949 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:55,949 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:56,702 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 21:21:56,702 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:56,704 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854366169]
[2025-04-28 21:21:56,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854366169] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:56,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:56,712 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:56,714 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869299548]
[2025-04-28 21:21:56,715 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:56,721 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:56,722 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:56,767 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:56,767 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:56,775 INFO  L87              Difference]: Start difference. First operand  has 150 states, 13 states have (on average 2.923076923076923) internal successors, (38), 38 states have internal predecessors, (38), 131 states have call successors, (137), 7 states have call predecessors, (137), 7 states have return successors, (137), 105 states have call predecessors, (137), 131 states have call successors, (137) Second operand  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:59,002 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:59,002 INFO  L93              Difference]: Finished difference Result 201 states and 574 transitions.
[2025-04-28 21:21:59,003 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:59,005 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:21:59,005 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:59,025 INFO  L225             Difference]: With dead ends: 201
[2025-04-28 21:21:59,026 INFO  L226             Difference]: Without dead ends: 201
[2025-04-28 21:21:59,030 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:59,037 INFO  L437           NwaCegarLoop]: 274 mSDtfsCounter, 9 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:59,038 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1466 Invalid, 1134 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time]
[2025-04-28 21:21:59,058 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 201 states.
[2025-04-28 21:21:59,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198.
[2025-04-28 21:21:59,307 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 198 states, 16 states have (on average 3.0) internal successors, (48), 47 states have internal predecessors, (48), 175 states have call successors, (183), 9 states have call predecessors, (183), 10 states have return successors, (339), 142 states have call predecessors, (339), 175 states have call successors, (339)
[2025-04-28 21:21:59,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions.
[2025-04-28 21:21:59,319 INFO  L79                 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 21
[2025-04-28 21:21:59,320 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:59,320 INFO  L485      AbstractCegarLoop]: Abstraction has 198 states and 570 transitions.
[2025-04-28 21:21:59,321 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:59,321 INFO  L278                IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions.
[2025-04-28 21:21:59,334 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:59,336 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:59,337 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:59,337 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:59,337 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:59,338 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:59,338 INFO  L85        PathProgramCache]: Analyzing trace with hash 922759241, now seen corresponding path program 1 times
[2025-04-28 21:21:59,338 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:59,338 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488042845]
[2025-04-28 21:21:59,338 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:59,338 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:59,360 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:59,386 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:59,386 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:59,386 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:59,884 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:59,885 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:59,885 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488042845]
[2025-04-28 21:21:59,885 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488042845] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:59,885 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:59,885 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:59,885 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191889201]
[2025-04-28 21:21:59,886 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:59,887 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:59,887 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:59,888 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:59,888 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:59,888 INFO  L87              Difference]: Start difference. First operand 198 states and 570 transitions. Second operand  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:01,531 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:01,531 INFO  L93              Difference]: Finished difference Result 247 states and 899 transitions.
[2025-04-28 21:22:01,532 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:22:01,532 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24
[2025-04-28 21:22:01,532 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:01,545 INFO  L225             Difference]: With dead ends: 247
[2025-04-28 21:22:01,545 INFO  L226             Difference]: Without dead ends: 246
[2025-04-28 21:22:01,546 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:22:01,548 INFO  L437           NwaCegarLoop]: 337 mSDtfsCounter, 9 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:01,548 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1464 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2025-04-28 21:22:01,550 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 246 states.
[2025-04-28 21:22:01,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242.
[2025-04-28 21:22:01,724 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 242 states, 20 states have (on average 2.95) internal successors, (59), 58 states have internal predecessors, (59), 213 states have call successors, (223), 11 states have call predecessors, (223), 13 states have return successors, (610), 173 states have call predecessors, (610), 213 states have call successors, (610)
[2025-04-28 21:22:01,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 892 transitions.
[2025-04-28 21:22:01,731 INFO  L79                 Accepts]: Start accepts. Automaton has 242 states and 892 transitions. Word has length 24
[2025-04-28 21:22:01,732 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:01,732 INFO  L485      AbstractCegarLoop]: Abstraction has 242 states and 892 transitions.
[2025-04-28 21:22:01,732 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:01,732 INFO  L278                IsEmpty]: Start isEmpty. Operand 242 states and 892 transitions.
[2025-04-28 21:22:01,746 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:22:01,746 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:01,746 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:01,746 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:22:01,746 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:01,747 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:01,747 INFO  L85        PathProgramCache]: Analyzing trace with hash 1144216420, now seen corresponding path program 1 times
[2025-04-28 21:22:01,747 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:01,747 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288505893]
[2025-04-28 21:22:01,748 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:01,748 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:01,764 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:01,784 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:01,784 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:01,784 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:02,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:02,182 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:02,182 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288505893]
[2025-04-28 21:22:02,183 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288505893] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:22:02,183 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:22:02,183 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:22:02,183 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743346096]
[2025-04-28 21:22:02,183 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:22:02,183 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:22:02,183 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:02,184 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:22:02,184 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:02,184 INFO  L87              Difference]: Start difference. First operand 242 states and 892 transitions. Second operand  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7)
[2025-04-28 21:22:04,229 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:04,230 INFO  L93              Difference]: Finished difference Result 366 states and 1793 transitions.
[2025-04-28 21:22:04,230 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:22:04,231 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 24
[2025-04-28 21:22:04,232 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:04,262 INFO  L225             Difference]: With dead ends: 366
[2025-04-28 21:22:04,262 INFO  L226             Difference]: Without dead ends: 365
[2025-04-28 21:22:04,262 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:04,265 INFO  L437           NwaCegarLoop]: 373 mSDtfsCounter, 17 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:04,266 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1960 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2025-04-28 21:22:04,268 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 365 states.
[2025-04-28 21:22:04,565 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359.
[2025-04-28 21:22:04,567 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 359 states, 28 states have (on average 3.142857142857143) internal successors, (88), 87 states have internal predecessors, (88), 320 states have call successors, (335), 16 states have call predecessors, (335), 18 states have return successors, (1357), 256 states have call predecessors, (1357), 320 states have call successors, (1357)
[2025-04-28 21:22:04,579 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1780 transitions.
[2025-04-28 21:22:04,580 INFO  L79                 Accepts]: Start accepts. Automaton has 359 states and 1780 transitions. Word has length 24
[2025-04-28 21:22:04,580 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:04,580 INFO  L485      AbstractCegarLoop]: Abstraction has 359 states and 1780 transitions.
[2025-04-28 21:22:04,580 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7)
[2025-04-28 21:22:04,580 INFO  L278                IsEmpty]: Start isEmpty. Operand 359 states and 1780 transitions.
[2025-04-28 21:22:04,600 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:22:04,600 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:04,600 INFO  L218           NwaCegarLoop]: trace histogram [2, 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 21:22:04,601 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2025-04-28 21:22:04,601 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:04,602 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:04,602 INFO  L85        PathProgramCache]: Analyzing trace with hash -1974850362, now seen corresponding path program 1 times
[2025-04-28 21:22:04,602 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:04,602 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556494925]
[2025-04-28 21:22:04,603 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:04,603 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:04,623 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:04,644 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:04,648 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:04,648 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:05,071 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 21:22:05,072 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:05,072 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556494925]
[2025-04-28 21:22:05,072 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556494925] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:05,072 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862387755]
[2025-04-28 21:22:05,072 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:05,073 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:05,077 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:05,083 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 21:22:05,085 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:22:05,171 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:05,271 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:05,271 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:05,271 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:05,279 INFO  L256         TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 13 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:05,297 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:05,415 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 21:22:05,416 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:06,589 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 21:22:06,589 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862387755] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:06,590 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:06,590 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11
[2025-04-28 21:22:06,590 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106520319]
[2025-04-28 21:22:06,590 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:06,590 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2025-04-28 21:22:06,591 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:06,591 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2025-04-28 21:22:06,591 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:22:06,591 INFO  L87              Difference]: Start difference. First operand 359 states and 1780 transitions. Second operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:22:09,304 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:09,305 INFO  L93              Difference]: Finished difference Result 496 states and 3502 transitions.
[2025-04-28 21:22:09,305 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:22:09,306 INFO  L79                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10) Word has length 24
[2025-04-28 21:22:09,306 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:09,350 INFO  L225             Difference]: With dead ends: 496
[2025-04-28 21:22:09,350 INFO  L226             Difference]: Without dead ends: 496
[2025-04-28 21:22:09,350 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:22:09,351 INFO  L437           NwaCegarLoop]: 308 mSDtfsCounter, 18 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:09,352 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 2065 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2025-04-28 21:22:09,353 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 496 states.
[2025-04-28 21:22:09,971 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 493.
[2025-04-28 21:22:09,975 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 493 states, 42 states have (on average 2.7857142857142856) internal successors, (117), 115 states have internal predecessors, (117), 430 states have call successors, (449), 20 states have call predecessors, (449), 30 states have return successors, (2932), 358 states have call predecessors, (2932), 430 states have call successors, (2932)
[2025-04-28 21:22:10,002 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 3498 transitions.
[2025-04-28 21:22:10,002 INFO  L79                 Accepts]: Start accepts. Automaton has 493 states and 3498 transitions. Word has length 24
[2025-04-28 21:22:10,003 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:10,003 INFO  L485      AbstractCegarLoop]: Abstraction has 493 states and 3498 transitions.
[2025-04-28 21:22:10,003 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:22:10,004 INFO  L278                IsEmpty]: Start isEmpty. Operand 493 states and 3498 transitions.
[2025-04-28 21:22:10,028 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:22:10,028 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:10,028 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:10,035 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:22:10,229 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:10,229 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:10,230 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:10,230 INFO  L85        PathProgramCache]: Analyzing trace with hash -756030512, now seen corresponding path program 1 times
[2025-04-28 21:22:10,230 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:10,230 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975521622]
[2025-04-28 21:22:10,230 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:10,231 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:10,259 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:22:10,277 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:22:10,277 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:10,277 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:10,492 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 21:22:10,492 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:10,492 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975521622]
[2025-04-28 21:22:10,492 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975521622] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:22:10,492 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:22:10,492 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:22:10,493 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773717074]
[2025-04-28 21:22:10,493 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:22:10,493 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:22:10,493 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:10,493 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:22:10,494 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:10,494 INFO  L87              Difference]: Start difference. First operand 493 states and 3498 transitions. Second operand  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:12,129 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:12,129 INFO  L93              Difference]: Finished difference Result 698 states and 7224 transitions.
[2025-04-28 21:22:12,130 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:22:12,130 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:22:12,130 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:12,230 INFO  L225             Difference]: With dead ends: 698
[2025-04-28 21:22:12,230 INFO  L226             Difference]: Without dead ends: 697
[2025-04-28 21:22:12,230 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:12,231 INFO  L437           NwaCegarLoop]: 310 mSDtfsCounter, 9 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:12,232 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1665 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2025-04-28 21:22:12,234 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 697 states.
[2025-04-28 21:22:13,787 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 695.
[2025-04-28 21:22:13,795 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 695 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 148 states have internal predecessors, (152), 598 states have call successors, (619), 24 states have call predecessors, (619), 47 states have return successors, (6445), 523 states have call predecessors, (6445), 598 states have call successors, (6445)
[2025-04-28 21:22:13,843 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 7216 transitions.
[2025-04-28 21:22:13,843 INFO  L79                 Accepts]: Start accepts. Automaton has 695 states and 7216 transitions. Word has length 21
[2025-04-28 21:22:13,843 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:13,843 INFO  L485      AbstractCegarLoop]: Abstraction has 695 states and 7216 transitions.
[2025-04-28 21:22:13,843 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:13,843 INFO  L278                IsEmpty]: Start isEmpty. Operand 695 states and 7216 transitions.
[2025-04-28 21:22:13,863 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2025-04-28 21:22:13,863 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:13,863 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:13,864 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2025-04-28 21:22:13,864 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:13,865 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:13,866 INFO  L85        PathProgramCache]: Analyzing trace with hash 1262287792, now seen corresponding path program 2 times
[2025-04-28 21:22:13,866 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:13,866 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356264007]
[2025-04-28 21:22:13,866 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:22:13,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:13,881 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes.
[2025-04-28 21:22:13,905 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:22:13,905 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:22:13,906 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:14,232 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:14,232 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:14,233 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356264007]
[2025-04-28 21:22:14,233 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356264007] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:14,233 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027121559]
[2025-04-28 21:22:14,234 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:22:14,234 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:14,241 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:14,244 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 21:22:14,248 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:22:14,308 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes.
[2025-04-28 21:22:14,387 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:22:14,387 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:22:14,387 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:14,390 INFO  L256         TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:14,393 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:14,588 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:14,590 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:16,275 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:22:16,276 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027121559] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:16,276 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:16,276 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19
[2025-04-28 21:22:16,276 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544178051]
[2025-04-28 21:22:16,276 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:16,276 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2025-04-28 21:22:16,277 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:16,277 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2025-04-28 21:22:16,277 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:22:16,278 INFO  L87              Difference]: Start difference. First operand 695 states and 7216 transitions. Second operand  has 19 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (17), 13 states have call predecessors, (17), 4 states have call successors, (17)
