./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-194.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:40,922 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:41,024 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f176e2e4-1e76-4440-ba0d-2f689e2ad713/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:41,034 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:41,034 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:41,063 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:41,065 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:41,065 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:41,067 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:41,067 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:41,068 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:41,068 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:41,069 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:41,069 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:41,069 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:41,069 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:41,069 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:41,069 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:41,069 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:41,069 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:41,069 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:41,070 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:41,070 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:41,070 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:41,070 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:41,071 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:41,072 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:41,376 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:41,387 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:41,390 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:41,393 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:41,394 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:41,395 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f176e2e4-1e76-4440-ba0d-2f689e2ad713/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-194.smt2
[2025-04-28 21:21:41,398 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:41,403 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:42,616 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f176e2e4-1e76-4440-ba0d-2f689e2ad713/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-194.smt2
[2025-04-28 21:21:42,620 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:42,622 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:42,624 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:42,625 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:42,625 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:42,628 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,739 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42 Unit
[2025-04-28 21:21:42,740 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:42,741 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:42,741 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:42,741 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:42,759 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,759 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,798 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,798 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,820 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,828 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,832 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,840 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,845 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,883 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:42,884 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:42,884 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:42,884 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:42,885 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (1/1) ...
[2025-04-28 21:21:42,888 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:42,904 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:42,919 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 21:21:42,925 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 21:21:42,939 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:42,939 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:42,939 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:42,940 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:42,940 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:42,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:42,940 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn__bar given in one single declaration
[2025-04-28 21:21:42,940 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn__bar
[2025-04-28 21:21:42,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn__bar
[2025-04-28 21:21:42,940 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn__bar given in one single declaration
[2025-04-28 21:21:42,940 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn__bar
[2025-04-28 21:21:42,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn__bar
[2025-04-28 21:21:42,940 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn given in one single declaration
[2025-04-28 21:21:42,941 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn
[2025-04-28 21:21:42,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn
[2025-04-28 21:21:42,941 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn given in one single declaration
[2025-04-28 21:21:42,941 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn
[2025-04-28 21:21:42,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn
[2025-04-28 21:21:42,941 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure lturn given in one single declaration
[2025-04-28 21:21:42,941 INFO  L130     BoogieDeclarations]: Found specification of procedure lturn
[2025-04-28 21:21:42,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure lturn
[2025-04-28 21:21:42,941 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:42,941 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:42,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:43,085 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:43,088 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:44,911 INFO  L?                        ?]: Removed 4 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:44,911 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:44,936 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:44,936 INFO  L312             CfgBuilder]: Removed 12 assume(true) statements.
[2025-04-28 21:21:44,937 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:44 BoogieIcfgContainer
[2025-04-28 21:21:44,937 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:44,939 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:44,940 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:44,946 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:44,947 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:42" (1/3) ...
[2025-04-28 21:21:44,947 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634a104e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:44, skipping insertion in model container
[2025-04-28 21:21:44,948 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:42" (2/3) ...
[2025-04-28 21:21:44,948 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634a104e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:44, skipping insertion in model container
[2025-04-28 21:21:44,949 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:44" (3/3) ...
[2025-04-28 21:21:44,951 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:44,968 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:44,971 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 8 procedures, 150 locations, 455 edges, 8 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:45,033 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:45,056 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;@1b291300, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:45,057 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:45,064 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 150 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 38 states have internal predecessors, (44), 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 21:21:45,103 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2025-04-28 21:21:45,103 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:45,104 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:45,104 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:45,112 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:45,114 INFO  L85        PathProgramCache]: Analyzing trace with hash -1273068546, now seen corresponding path program 1 times
[2025-04-28 21:21:45,121 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:45,122 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285804462]
[2025-04-28 21:21:45,122 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:45,123 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:45,172 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes.
[2025-04-28 21:21:45,425 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements.
[2025-04-28 21:21:45,426 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:45,426 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:46,645 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 21:21:46,648 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:46,649 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285804462]
[2025-04-28 21:21:46,650 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285804462] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:46,652 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:46,656 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:46,658 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587829460]
[2025-04-28 21:21:46,659 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:46,664 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:46,664 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:46,701 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:46,701 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:46,735 INFO  L87              Difference]: Start difference. First operand  has 150 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 38 states have internal predecessors, (44), 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 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:48,962 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:48,962 INFO  L93              Difference]: Finished difference Result 190 states and 524 transitions.
[2025-04-28 21:21:48,964 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:48,966 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 18
[2025-04-28 21:21:48,966 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:48,990 INFO  L225             Difference]: With dead ends: 190
[2025-04-28 21:21:48,991 INFO  L226             Difference]: Without dead ends: 190
[2025-04-28 21:21:48,993 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 21:21:48,998 INFO  L437           NwaCegarLoop]: 306 mSDtfsCounter, 9 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:48,999 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1369 Invalid, 760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time]
[2025-04-28 21:21:49,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 190 states.
[2025-04-28 21:21:49,228 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188.
[2025-04-28 21:21:49,230 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 188 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 47 states have internal predecessors, (58), 167 states have call successors, (174), 9 states have call predecessors, (174), 9 states have return successors, (289), 133 states have call predecessors, (289), 167 states have call successors, (289)
[2025-04-28 21:21:49,252 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 521 transitions.
[2025-04-28 21:21:49,253 INFO  L79                 Accepts]: Start accepts. Automaton has 188 states and 521 transitions. Word has length 18
[2025-04-28 21:21:49,255 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:49,256 INFO  L485      AbstractCegarLoop]: Abstraction has 188 states and 521 transitions.
[2025-04-28 21:21:49,256 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:49,256 INFO  L278                IsEmpty]: Start isEmpty. Operand 188 states and 521 transitions.
[2025-04-28 21:21:49,273 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2025-04-28 21:21:49,273 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:49,273 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:49,275 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:49,275 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:49,276 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:49,276 INFO  L85        PathProgramCache]: Analyzing trace with hash -430354898, now seen corresponding path program 1 times
[2025-04-28 21:21:49,276 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:49,276 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240527564]
[2025-04-28 21:21:49,276 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:49,277 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:49,305 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes.
[2025-04-28 21:21:49,400 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements.
[2025-04-28 21:21:49,401 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:49,401 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:49,959 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 21:21:49,960 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:49,960 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240527564]
[2025-04-28 21:21:49,960 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240527564] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:49,960 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:49,960 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:49,960 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750974375]
[2025-04-28 21:21:49,960 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:49,962 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:49,964 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:49,965 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:49,965 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:49,965 INFO  L87              Difference]: Start difference. First operand 188 states and 521 transitions. Second operand  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:51,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:51,451 INFO  L93              Difference]: Finished difference Result 270 states and 1024 transitions.
[2025-04-28 21:21:51,452 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:51,452 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 18
[2025-04-28 21:21:51,452 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:51,474 INFO  L225             Difference]: With dead ends: 270
[2025-04-28 21:21:51,474 INFO  L226             Difference]: Without dead ends: 270
[2025-04-28 21:21:51,475 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 21:21:51,476 INFO  L437           NwaCegarLoop]: 333 mSDtfsCounter, 10 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:51,477 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1518 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2025-04-28 21:21:51,479 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 270 states.
[2025-04-28 21:21:51,736 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268.
[2025-04-28 21:21:51,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 268 states, 21 states have (on average 3.857142857142857) internal successors, (81), 68 states have internal predecessors, (81), 239 states have call successors, (249), 13 states have call predecessors, (249), 13 states have return successors, (692), 189 states have call predecessors, (692), 239 states have call successors, (692)
[2025-04-28 21:21:51,747 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 1022 transitions.
[2025-04-28 21:21:51,747 INFO  L79                 Accepts]: Start accepts. Automaton has 268 states and 1022 transitions. Word has length 18
[2025-04-28 21:21:51,748 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:51,748 INFO  L485      AbstractCegarLoop]: Abstraction has 268 states and 1022 transitions.
[2025-04-28 21:21:51,748 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:51,748 INFO  L278                IsEmpty]: Start isEmpty. Operand 268 states and 1022 transitions.
[2025-04-28 21:21:51,761 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:51,761 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:51,761 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:51,761 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:21:51,761 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:51,762 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:51,763 INFO  L85        PathProgramCache]: Analyzing trace with hash -718061041, now seen corresponding path program 1 times
[2025-04-28 21:21:51,763 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:51,763 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386367136]
[2025-04-28 21:21:51,763 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:51,763 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:51,790 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:51,837 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:51,837 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:51,837 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:52,497 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 21:21:52,497 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:52,497 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386367136]
[2025-04-28 21:21:52,497 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386367136] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:52,497 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:52,497 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:52,497 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617262844]
[2025-04-28 21:21:52,498 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:52,498 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:52,498 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:52,499 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:52,499 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:52,500 INFO  L87              Difference]: Start difference. First operand 268 states and 1022 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 21:21:54,222 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:54,223 INFO  L93              Difference]: Finished difference Result 317 states and 1453 transitions.
[2025-04-28 21:21:54,223 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:54,224 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 21
[2025-04-28 21:21:54,224 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:54,247 INFO  L225             Difference]: With dead ends: 317
[2025-04-28 21:21:54,248 INFO  L226             Difference]: Without dead ends: 317
[2025-04-28 21:21:54,248 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 21:21:54,249 INFO  L437           NwaCegarLoop]: 308 mSDtfsCounter, 9 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:54,249 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1340 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2025-04-28 21:21:54,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 317 states.
[2025-04-28 21:21:54,549 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314.
[2025-04-28 21:21:54,551 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 314 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 81 states have internal predecessors, (94), 275 states have call successors, (287), 15 states have call predecessors, (287), 18 states have return successors, (1069), 220 states have call predecessors, (1069), 275 states have call successors, (1069)
[2025-04-28 21:21:54,563 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1450 transitions.
[2025-04-28 21:21:54,563 INFO  L79                 Accepts]: Start accepts. Automaton has 314 states and 1450 transitions. Word has length 21
[2025-04-28 21:21:54,564 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:54,564 INFO  L485      AbstractCegarLoop]: Abstraction has 314 states and 1450 transitions.
[2025-04-28 21:21:54,564 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 21:21:54,564 INFO  L278                IsEmpty]: Start isEmpty. Operand 314 states and 1450 transitions.
[2025-04-28 21:21:54,580 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:54,580 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:54,581 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:54,581 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2025-04-28 21:21:54,581 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:54,581 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:54,582 INFO  L85        PathProgramCache]: Analyzing trace with hash 588280330, now seen corresponding path program 1 times
[2025-04-28 21:21:54,582 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:54,582 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123669772]
[2025-04-28 21:21:54,582 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:54,582 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:54,636 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:54,676 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:54,676 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:54,676 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:55,205 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 21:21:55,205 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:55,205 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123669772]
[2025-04-28 21:21:55,205 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123669772] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:55,206 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:55,206 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:55,206 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452638741]
[2025-04-28 21:21:55,206 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:55,206 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:55,206 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:55,207 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:55,207 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:55,207 INFO  L87              Difference]: Start difference. First operand 314 states and 1450 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 21:21:56,832 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:56,833 INFO  L93              Difference]: Finished difference Result 447 states and 2894 transitions.
[2025-04-28 21:21:56,833 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:56,833 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 21
[2025-04-28 21:21:56,834 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:56,866 INFO  L225             Difference]: With dead ends: 447
[2025-04-28 21:21:56,866 INFO  L226             Difference]: Without dead ends: 447
[2025-04-28 21:21:56,866 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 21:21:56,867 INFO  L437           NwaCegarLoop]: 356 mSDtfsCounter, 9 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:56,868 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1614 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2025-04-28 21:21:56,869 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 447 states.
[2025-04-28 21:21:57,495 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 442.
[2025-04-28 21:21:57,499 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 442 states, 40 states have (on average 3.025) internal successors, (121), 108 states have internal predecessors, (121), 381 states have call successors, (397), 19 states have call predecessors, (397), 29 states have return successors, (2362), 317 states have call predecessors, (2362), 381 states have call successors, (2362)
[2025-04-28 21:21:57,531 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 2880 transitions.
[2025-04-28 21:21:57,531 INFO  L79                 Accepts]: Start accepts. Automaton has 442 states and 2880 transitions. Word has length 21
[2025-04-28 21:21:57,531 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:57,531 INFO  L485      AbstractCegarLoop]: Abstraction has 442 states and 2880 transitions.
[2025-04-28 21:21:57,532 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 21:21:57,532 INFO  L278                IsEmpty]: Start isEmpty. Operand 442 states and 2880 transitions.
[2025-04-28 21:21:57,556 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:57,556 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:57,556 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 21:21:57,556 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2025-04-28 21:21:57,557 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:57,558 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:57,559 INFO  L85        PathProgramCache]: Analyzing trace with hash 931477260, now seen corresponding path program 1 times
[2025-04-28 21:21:57,559 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:57,559 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695526271]
[2025-04-28 21:21:57,559 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:57,559 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:57,591 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:57,635 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:57,635 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:57,635 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:58,214 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 21:21:58,214 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:58,214 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695526271]
[2025-04-28 21:21:58,214 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695526271] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:58,214 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:58,215 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:58,215 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408306697]
[2025-04-28 21:21:58,215 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:58,215 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:58,217 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:58,217 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:58,218 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:58,218 INFO  L87              Difference]: Start difference. First operand 442 states and 2880 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 21:22:00,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:00,455 INFO  L93              Difference]: Finished difference Result 613 states and 5256 transitions.
[2025-04-28 21:22:00,456 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:22:00,456 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 21:22:00,456 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:00,538 INFO  L225             Difference]: With dead ends: 613
[2025-04-28 21:22:00,538 INFO  L226             Difference]: Without dead ends: 613
[2025-04-28 21:22:00,539 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 21:22:00,540 INFO  L437           NwaCegarLoop]: 281 mSDtfsCounter, 17 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:00,541 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1457 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2025-04-28 21:22:00,542 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 613 states.
[2025-04-28 21:22:01,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 609.
[2025-04-28 21:22:01,804 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 609 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 141 states have internal predecessors, (154), 530 states have call successors, (551), 24 states have call predecessors, (551), 38 states have return successors, (4546), 446 states have call predecessors, (4546), 530 states have call successors, (4546)
[2025-04-28 21:22:01,857 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 5251 transitions.
[2025-04-28 21:22:01,858 INFO  L79                 Accepts]: Start accepts. Automaton has 609 states and 5251 transitions. Word has length 24
[2025-04-28 21:22:01,858 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:01,858 INFO  L485      AbstractCegarLoop]: Abstraction has 609 states and 5251 transitions.
[2025-04-28 21:22:01,858 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 21:22:01,859 INFO  L278                IsEmpty]: Start isEmpty. Operand 609 states and 5251 transitions.
[2025-04-28 21:22:01,890 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:22:01,890 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:01,890 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 21:22:01,891 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2025-04-28 21:22:01,891 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:01,892 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:01,893 INFO  L85        PathProgramCache]: Analyzing trace with hash -1397885740, now seen corresponding path program 1 times
[2025-04-28 21:22:01,893 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:01,893 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422235404]
[2025-04-28 21:22:01,893 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:01,893 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:01,917 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:22:01,954 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:22:01,954 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:01,954 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:02,357 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 21:22:02,357 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:02,357 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422235404]
[2025-04-28 21:22:02,358 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422235404] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:22:02,358 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:22:02,359 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:22:02,359 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80658538]
[2025-04-28 21:22:02,359 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:22:02,359 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:22:02,359 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:02,360 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:22:02,360 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:02,361 INFO  L87              Difference]: Start difference. First operand 609 states and 5251 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 21:22:04,656 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:04,657 INFO  L93              Difference]: Finished difference Result 1033 states and 14032 transitions.
[2025-04-28 21:22:04,657 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:22:04,658 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 21:22:04,658 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:04,807 INFO  L225             Difference]: With dead ends: 1033
[2025-04-28 21:22:04,807 INFO  L226             Difference]: Without dead ends: 1033
[2025-04-28 21:22:04,808 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 21:22:04,809 INFO  L437           NwaCegarLoop]: 345 mSDtfsCounter, 10 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:04,810 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1868 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2025-04-28 21:22:04,812 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1033 states.
[2025-04-28 21:22:08,160 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1030.
[2025-04-28 21:22:08,172 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1030 states, 89 states have (on average 2.640449438202247) internal successors, (235), 221 states have internal predecessors, (235), 889 states have call successors, (922), 36 states have call predecessors, (922), 69 states have return successors, (12871), 776 states have call predecessors, (12871), 889 states have call successors, (12871)
[2025-04-28 21:22:08,286 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 14028 transitions.
[2025-04-28 21:22:08,287 INFO  L79                 Accepts]: Start accepts. Automaton has 1030 states and 14028 transitions. Word has length 21
[2025-04-28 21:22:08,287 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:08,287 INFO  L485      AbstractCegarLoop]: Abstraction has 1030 states and 14028 transitions.
[2025-04-28 21:22:08,287 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 21:22:08,288 INFO  L278                IsEmpty]: Start isEmpty. Operand 1030 states and 14028 transitions.
[2025-04-28 21:22:08,315 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:22:08,315 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:08,315 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 21:22:08,315 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2025-04-28 21:22:08,316 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:08,317 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:08,317 INFO  L85        PathProgramCache]: Analyzing trace with hash -1613951340, now seen corresponding path program 1 times
[2025-04-28 21:22:08,317 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:08,318 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221940772]
[2025-04-28 21:22:08,318 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:08,318 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:08,341 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:22:08,376 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:22:08,378 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:08,378 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:08,811 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 21:22:08,811 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:08,811 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221940772]
[2025-04-28 21:22:08,811 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221940772] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:22:08,811 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:22:08,811 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:22:08,813 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419592724]
[2025-04-28 21:22:08,813 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:22:08,813 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:22:08,813 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:08,814 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:22:08,815 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:08,815 INFO  L87              Difference]: Start difference. First operand 1030 states and 14028 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)
