/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c


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This is Ultimate 0.1.25-72570d3
[2020-08-22 18:48:19,124 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2020-08-22 18:48:19,167 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2020-08-22 18:48:19,171 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
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[2020-08-22 18:48:19,188 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2020-08-22 18:48:19,198 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-22 18:48:19,198 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-22 18:48:19,200 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-22 18:48:19,200 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-22 18:48:19,200 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-22 18:48:19,200 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-22 18:48:19,200 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-22 18:48:19,201 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-22 18:48:19,201 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-22 18:48:19,201 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-22 18:48:19,201 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-22 18:48:19,201 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-22 18:48:19,202 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-22 18:48:19,202 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-22 18:48:19,202 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-22 18:48:19,202 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2020-08-22 18:48:19,202 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-22 18:48:19,203 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-22 18:48:19,203 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-22 18:48:19,203 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-22 18:48:19,203 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-08-22 18:48:19,203 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-22 18:48:19,204 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
[2020-08-22 18:48:19,506 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-22 18:48:19,518 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-22 18:48:19,521 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-22 18:48:19,522 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-22 18:48:19,523 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-22 18:48:19,524 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c
[2020-08-22 18:48:19,586 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b8e51c5/286f6491327d4af1a18226b20bccd8c2/FLAG683079578
[2020-08-22 18:48:19,976 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-22 18:48:19,977 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c
[2020-08-22 18:48:19,982 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b8e51c5/286f6491327d4af1a18226b20bccd8c2/FLAG683079578
[2020-08-22 18:48:20,341 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b8e51c5/286f6491327d4af1a18226b20bccd8c2
[2020-08-22 18:48:20,350 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-22 18:48:20,352 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-22 18:48:20,353 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-22 18:48:20,353 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-22 18:48:20,360 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-22 18:48:20,361 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,364 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b19978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20, skipping insertion in model container
[2020-08-22 18:48:20,364 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,373 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-22 18:48:20,390 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-22 18:48:20,581 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-22 18:48:20,590 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-22 18:48:20,611 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-22 18:48:20,629 INFO  L208         MainTranslator]: Completed translation
[2020-08-22 18:48:20,630 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20 WrapperNode
[2020-08-22 18:48:20,630 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-22 18:48:20,632 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-22 18:48:20,632 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-22 18:48:20,632 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-22 18:48:20,648 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,649 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,654 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,655 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,659 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,662 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,663 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
[2020-08-22 18:48:20,664 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-22 18:48:20,665 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-22 18:48:20,666 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-22 18:48:20,666 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-22 18:48:20,669 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-22 18:48:20,842 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-22 18:48:20,842 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-22 18:48:20,842 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo
[2020-08-22 18:48:20,842 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-22 18:48:20,843 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-22 18:48:20,843 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-22 18:48:20,843 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo
[2020-08-22 18:48:20,843 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-22 18:48:20,843 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-22 18:48:20,843 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-22 18:48:21,186 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-22 18:48:21,187 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-22 18:48:21,190 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:48:21 BoogieIcfgContainer
[2020-08-22 18:48:21,192 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-22 18:48:21,194 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-22 18:48:21,194 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-22 18:48:21,198 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-22 18:48:21,199 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:48:20" (1/3) ...
[2020-08-22 18:48:21,200 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46207e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:48:21, skipping insertion in model container
[2020-08-22 18:48:21,200 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:48:20" (2/3) ...
[2020-08-22 18:48:21,202 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46207e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:48:21, skipping insertion in model container
[2020-08-22 18:48:21,202 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:48:21" (3/3) ...
[2020-08-22 18:48:21,204 INFO  L109   eAbstractionObserver]: Analyzing ICFG fibo_5-1.c
[2020-08-22 18:48:21,215 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-22 18:48:21,222 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-22 18:48:21,236 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-22 18:48:21,259 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-22 18:48:21,260 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-22 18:48:21,260 INFO  L377      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2020-08-22 18:48:21,260 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-22 18:48:21,260 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-22 18:48:21,260 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-22 18:48:21,260 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-22 18:48:21,261 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-22 18:48:21,276 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states.
[2020-08-22 18:48:21,287 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-08-22 18:48:21,287 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:21,289 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:21,289 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:21,295 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:21,296 INFO  L82        PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times
[2020-08-22 18:48:21,305 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:21,306 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130584538]
[2020-08-22 18:48:21,306 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:21,363 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:21,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,459 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:21,460 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,463 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:21,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 18:48:21,518 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130584538]
[2020-08-22 18:48:21,520 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:21,521 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 18:48:21,521 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014470439]
[2020-08-22 18:48:21,527 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 18:48:21,527 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:21,542 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 18:48:21,543 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 18:48:21,545 INFO  L87              Difference]: Start difference. First operand 31 states. Second operand 5 states.
[2020-08-22 18:48:21,660 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:21,660 INFO  L93              Difference]: Finished difference Result 44 states and 50 transitions.
[2020-08-22 18:48:21,661 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 18:48:21,663 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-08-22 18:48:21,663 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:21,672 INFO  L225             Difference]: With dead ends: 44
[2020-08-22 18:48:21,673 INFO  L226             Difference]: Without dead ends: 28
[2020-08-22 18:48:21,676 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 18:48:21,692 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-08-22 18:48:21,717 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-08-22 18:48:21,718 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-08-22 18:48:21,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2020-08-22 18:48:21,721 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16
[2020-08-22 18:48:21,721 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:21,722 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2020-08-22 18:48:21,722 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 18:48:21,722 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2020-08-22 18:48:21,724 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-08-22 18:48:21,724 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:21,724 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:21,725 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-22 18:48:21,725 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:21,725 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:21,726 INFO  L82        PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times
[2020-08-22 18:48:21,726 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:21,726 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470715000]
[2020-08-22 18:48:21,727 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:21,728 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:21,737 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,763 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:21,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,767 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:21,771 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 18:48:21,799 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470715000]
[2020-08-22 18:48:21,799 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:21,800 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 18:48:21,800 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184369030]
[2020-08-22 18:48:21,801 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 18:48:21,801 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:21,802 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 18:48:21,802 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 18:48:21,802 INFO  L87              Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states.
[2020-08-22 18:48:21,881 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:21,881 INFO  L93              Difference]: Finished difference Result 36 states and 41 transitions.
[2020-08-22 18:48:21,882 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 18:48:21,882 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 17
[2020-08-22 18:48:21,882 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:21,884 INFO  L225             Difference]: With dead ends: 36
[2020-08-22 18:48:21,884 INFO  L226             Difference]: Without dead ends: 30
[2020-08-22 18:48:21,886 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 18:48:21,886 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-08-22 18:48:21,896 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28.
[2020-08-22 18:48:21,896 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-08-22 18:48:21,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2020-08-22 18:48:21,898 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17
[2020-08-22 18:48:21,898 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:21,898 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2020-08-22 18:48:21,899 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 18:48:21,899 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2020-08-22 18:48:21,901 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-08-22 18:48:21,901 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:21,901 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:21,901 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-22 18:48:21,902 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:21,902 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:21,902 INFO  L82        PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times
[2020-08-22 18:48:21,903 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:21,903 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551833900]
[2020-08-22 18:48:21,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:21,905 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:21,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,949 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:21,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,952 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:21,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:21,993 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:21,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,056 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-22 18:48:22,064 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,084 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-08-22 18:48:22,085 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551833900]
[2020-08-22 18:48:22,085 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:22,085 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-08-22 18:48:22,086 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572142274]
[2020-08-22 18:48:22,086 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-22 18:48:22,087 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:22,087 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-22 18:48:22,087 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-08-22 18:48:22,091 INFO  L87              Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states.
[2020-08-22 18:48:22,263 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:22,263 INFO  L93              Difference]: Finished difference Result 52 states and 63 transitions.
[2020-08-22 18:48:22,264 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-22 18:48:22,264 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 33
[2020-08-22 18:48:22,265 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:22,266 INFO  L225             Difference]: With dead ends: 52
[2020-08-22 18:48:22,266 INFO  L226             Difference]: Without dead ends: 30
[2020-08-22 18:48:22,267 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2020-08-22 18:48:22,268 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-08-22 18:48:22,278 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-08-22 18:48:22,278 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-22 18:48:22,279 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions.
[2020-08-22 18:48:22,280 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33
[2020-08-22 18:48:22,280 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:22,281 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 34 transitions.
[2020-08-22 18:48:22,281 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-22 18:48:22,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions.
[2020-08-22 18:48:22,283 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-08-22 18:48:22,284 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:22,284 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:22,284 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-22 18:48:22,285 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:22,285 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:22,285 INFO  L82        PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times
[2020-08-22 18:48:22,286 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:22,286 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876240728]
[2020-08-22 18:48:22,286 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:22,289 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:22,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,322 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:22,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,325 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:22,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,363 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:22,366 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,382 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:22,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,393 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-08-22 18:48:22,394 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876240728]
[2020-08-22 18:48:22,394 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:22,395 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-22 18:48:22,395 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791892974]
[2020-08-22 18:48:22,396 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-22 18:48:22,396 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:22,396 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-22 18:48:22,397 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-08-22 18:48:22,397 INFO  L87              Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states.
[2020-08-22 18:48:22,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:22,523 INFO  L93              Difference]: Finished difference Result 56 states and 70 transitions.
[2020-08-22 18:48:22,524 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-22 18:48:22,524 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 34
[2020-08-22 18:48:22,524 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:22,527 INFO  L225             Difference]: With dead ends: 56
[2020-08-22 18:48:22,527 INFO  L226             Difference]: Without dead ends: 50
[2020-08-22 18:48:22,528 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2020-08-22 18:48:22,528 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-08-22 18:48:22,541 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50.
[2020-08-22 18:48:22,541 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-08-22 18:48:22,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions.
[2020-08-22 18:48:22,544 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34
[2020-08-22 18:48:22,544 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:22,544 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 64 transitions.
[2020-08-22 18:48:22,544 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-22 18:48:22,545 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions.
[2020-08-22 18:48:22,547 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-08-22 18:48:22,547 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:22,547 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:22,548 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-22 18:48:22,548 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:22,548 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:22,548 INFO  L82        PathProgramCache]: Analyzing trace with hash 1274787059, now seen corresponding path program 2 times
[2020-08-22 18:48:22,549 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:22,549 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487790223]
[2020-08-22 18:48:22,549 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:22,551 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:22,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,580 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:22,581 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,582 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:22,594 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,632 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:22,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,681 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:22,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,686 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:22,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,692 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:22,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2020-08-22 18:48:22,712 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487790223]
[2020-08-22 18:48:22,712 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:22,712 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-08-22 18:48:22,713 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485284821]
[2020-08-22 18:48:22,713 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-22 18:48:22,713 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:22,714 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-22 18:48:22,714 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-22 18:48:22,714 INFO  L87              Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 8 states.
[2020-08-22 18:48:22,861 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:22,862 INFO  L93              Difference]: Finished difference Result 111 states and 156 transitions.
[2020-08-22 18:48:22,862 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-08-22 18:48:22,862 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 51
[2020-08-22 18:48:22,863 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:22,865 INFO  L225             Difference]: With dead ends: 111
[2020-08-22 18:48:22,865 INFO  L226             Difference]: Without dead ends: 67
[2020-08-22 18:48:22,867 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2020-08-22 18:48:22,867 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2020-08-22 18:48:22,880 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55.
[2020-08-22 18:48:22,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-08-22 18:48:22,882 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions.
[2020-08-22 18:48:22,882 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51
[2020-08-22 18:48:22,882 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:22,883 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 70 transitions.
[2020-08-22 18:48:22,883 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-22 18:48:22,883 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions.
[2020-08-22 18:48:22,885 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-08-22 18:48:22,885 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:22,886 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:22,886 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-22 18:48:22,886 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:22,886 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:22,887 INFO  L82        PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 3 times
[2020-08-22 18:48:22,887 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:22,887 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92724875]
[2020-08-22 18:48:22,887 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:22,889 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:22,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,919 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:22,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,921 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:22,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:22,989 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:22,994 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,012 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,028 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:23,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,033 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:23,035 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,042 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-22 18:48:23,043 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92724875]
[2020-08-22 18:48:23,043 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:23,043 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-08-22 18:48:23,043 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850597335]
[2020-08-22 18:48:23,044 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-22 18:48:23,044 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:23,044 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-22 18:48:23,045 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-08-22 18:48:23,045 INFO  L87              Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 7 states.
[2020-08-22 18:48:23,165 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:23,165 INFO  L93              Difference]: Finished difference Result 89 states and 117 transitions.
[2020-08-22 18:48:23,166 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-22 18:48:23,166 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 52
[2020-08-22 18:48:23,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:23,168 INFO  L225             Difference]: With dead ends: 89
[2020-08-22 18:48:23,169 INFO  L226             Difference]: Without dead ends: 83
[2020-08-22 18:48:23,170 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90
[2020-08-22 18:48:23,170 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-08-22 18:48:23,187 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77.
[2020-08-22 18:48:23,187 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 77 states.
[2020-08-22 18:48:23,189 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions.
[2020-08-22 18:48:23,189 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52
[2020-08-22 18:48:23,190 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:23,190 INFO  L479      AbstractCegarLoop]: Abstraction has 77 states and 103 transitions.
[2020-08-22 18:48:23,190 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-22 18:48:23,191 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions.
[2020-08-22 18:48:23,196 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2020-08-22 18:48:23,196 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:23,196 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:23,197 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-22 18:48:23,197 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:23,197 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:23,197 INFO  L82        PathProgramCache]: Analyzing trace with hash 1883941443, now seen corresponding path program 4 times
[2020-08-22 18:48:23,198 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:23,198 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226693207]
[2020-08-22 18:48:23,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:23,200 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:23,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,257 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:23,258 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,260 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:23,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,348 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,387 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,413 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,433 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:23,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,440 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:23,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,447 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:23,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,496 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,523 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,552 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:23,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,557 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:23,558 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,562 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:23,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,570 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:23,572 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:23,606 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked.
[2020-08-22 18:48:23,607 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226693207]
[2020-08-22 18:48:23,607 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:23,607 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2020-08-22 18:48:23,607 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638236782]
[2020-08-22 18:48:23,610 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-08-22 18:48:23,610 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:23,610 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-08-22 18:48:23,611 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-08-22 18:48:23,611 INFO  L87              Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 11 states.
[2020-08-22 18:48:23,978 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:23,979 INFO  L93              Difference]: Finished difference Result 142 states and 213 transitions.
[2020-08-22 18:48:23,980 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-08-22 18:48:23,980 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 123
[2020-08-22 18:48:23,981 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:23,985 INFO  L225             Difference]: With dead ends: 142
[2020-08-22 18:48:23,985 INFO  L226             Difference]: Without dead ends: 73
[2020-08-22 18:48:23,994 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462
[2020-08-22 18:48:23,994 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2020-08-22 18:48:24,023 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70.
[2020-08-22 18:48:24,024 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-08-22 18:48:24,026 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions.
[2020-08-22 18:48:24,027 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 123
[2020-08-22 18:48:24,027 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:24,027 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 83 transitions.
[2020-08-22 18:48:24,028 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-08-22 18:48:24,031 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions.
[2020-08-22 18:48:24,034 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 194
[2020-08-22 18:48:24,034 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:24,037 INFO  L422         BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:24,037 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-22 18:48:24,037 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:24,038 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:24,038 INFO  L82        PathProgramCache]: Analyzing trace with hash 532445701, now seen corresponding path program 5 times
[2020-08-22 18:48:24,039 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:24,039 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172209121]
[2020-08-22 18:48:24,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:24,050 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:24,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,135 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:24,136 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,137 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:24,162 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,224 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,269 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,278 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,297 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,314 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,316 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,333 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:24,335 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,338 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:24,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,342 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:24,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,348 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,350 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:24,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,356 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81
[2020-08-22 18:48:24,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,387 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,417 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,441 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,469 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,480 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:24,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,487 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:24,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,492 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:24,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,507 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:24,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,512 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:24,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,519 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81
[2020-08-22 18:48:24,520 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:24,602 INFO  L134       CoverageAnalysis]: Checked inductivity of 322 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked.
[2020-08-22 18:48:24,603 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172209121]
[2020-08-22 18:48:24,603 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:24,603 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2020-08-22 18:48:24,604 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001902490]
[2020-08-22 18:48:24,605 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-08-22 18:48:24,605 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:24,605 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-08-22 18:48:24,606 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156
[2020-08-22 18:48:24,606 INFO  L87              Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 13 states.
[2020-08-22 18:48:25,036 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:25,036 INFO  L93              Difference]: Finished difference Result 149 states and 204 transitions.
[2020-08-22 18:48:25,037 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-08-22 18:48:25,037 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 193
[2020-08-22 18:48:25,038 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:25,039 INFO  L225             Difference]: With dead ends: 149
[2020-08-22 18:48:25,039 INFO  L226             Difference]: Without dead ends: 92
[2020-08-22 18:48:25,041 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756
[2020-08-22 18:48:25,041 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2020-08-22 18:48:25,054 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79.
[2020-08-22 18:48:25,055 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-08-22 18:48:25,056 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions.
[2020-08-22 18:48:25,056 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 193
[2020-08-22 18:48:25,057 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:25,057 INFO  L479      AbstractCegarLoop]: Abstraction has 79 states and 94 transitions.
[2020-08-22 18:48:25,057 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-08-22 18:48:25,057 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions.
[2020-08-22 18:48:25,058 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 141
[2020-08-22 18:48:25,059 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:25,059 INFO  L422         BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:25,059 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-22 18:48:25,059 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:25,060 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:25,060 INFO  L82        PathProgramCache]: Analyzing trace with hash -1618484333, now seen corresponding path program 6 times
[2020-08-22 18:48:25,060 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:25,060 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473632807]
[2020-08-22 18:48:25,061 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:25,062 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:25,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,136 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:25,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,139 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:25,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,219 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,227 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,275 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,332 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,335 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,386 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,391 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:25,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,417 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:25,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,424 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:25,427 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,433 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,438 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:25,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,451 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81
[2020-08-22 18:48:25,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,463 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,465 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,471 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:25,473 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,475 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:25,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,481 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:25,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:25,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2020-08-22 18:48:25,537 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473632807]
[2020-08-22 18:48:25,537 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:25,537 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2020-08-22 18:48:25,538 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375230307]
[2020-08-22 18:48:25,538 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-08-22 18:48:25,539 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:25,539 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-08-22 18:48:25,539 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240
[2020-08-22 18:48:25,540 INFO  L87              Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 16 states.
[2020-08-22 18:48:26,030 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:26,030 INFO  L93              Difference]: Finished difference Result 102 states and 123 transitions.
[2020-08-22 18:48:26,031 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-08-22 18:48:26,031 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 140
[2020-08-22 18:48:26,032 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:26,033 INFO  L225             Difference]: With dead ends: 102
[2020-08-22 18:48:26,033 INFO  L226             Difference]: Without dead ends: 96
[2020-08-22 18:48:26,034 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600
[2020-08-22 18:48:26,034 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-08-22 18:48:26,049 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93.
[2020-08-22 18:48:26,049 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-08-22 18:48:26,051 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions.
[2020-08-22 18:48:26,051 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 140
[2020-08-22 18:48:26,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:26,052 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 113 transitions.
[2020-08-22 18:48:26,052 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-08-22 18:48:26,052 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions.
[2020-08-22 18:48:26,054 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 176
[2020-08-22 18:48:26,055 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:26,055 INFO  L422         BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:26,055 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-08-22 18:48:26,055 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:26,056 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:26,056 INFO  L82        PathProgramCache]: Analyzing trace with hash 1853518064, now seen corresponding path program 7 times
[2020-08-22 18:48:26,056 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:26,057 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309901436]
[2020-08-22 18:48:26,057 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:26,059 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:26,069 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,113 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:26,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,118 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:26,143 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,170 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,199 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,233 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,237 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,243 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,244 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,250 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,251 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,252 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:26,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,255 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:26,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,259 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:26,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,292 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,294 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,295 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:26,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,305 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81
[2020-08-22 18:48:26,308 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,321 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,335 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:26,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,347 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116
[2020-08-22 18:48:26,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,354 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,355 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,366 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,368 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:26,369 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,370 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:26,372 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,428 INFO  L134       CoverageAnalysis]: Checked inductivity of 181 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked.
[2020-08-22 18:48:26,429 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309901436]
[2020-08-22 18:48:26,429 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:26,429 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2020-08-22 18:48:26,429 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746529543]
[2020-08-22 18:48:26,430 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-22 18:48:26,430 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:26,431 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-22 18:48:26,448 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2020-08-22 18:48:26,449 INFO  L87              Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 10 states.
[2020-08-22 18:48:26,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:26,671 INFO  L93              Difference]: Finished difference Result 171 states and 210 transitions.
[2020-08-22 18:48:26,672 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-08-22 18:48:26,672 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 175
[2020-08-22 18:48:26,673 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:26,675 INFO  L225             Difference]: With dead ends: 171
[2020-08-22 18:48:26,675 INFO  L226             Difference]: Without dead ends: 88
[2020-08-22 18:48:26,677 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240
[2020-08-22 18:48:26,678 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2020-08-22 18:48:26,700 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85.
[2020-08-22 18:48:26,701 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 85 states.
[2020-08-22 18:48:26,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions.
[2020-08-22 18:48:26,702 INFO  L78                 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 175
[2020-08-22 18:48:26,703 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:26,703 INFO  L479      AbstractCegarLoop]: Abstraction has 85 states and 98 transitions.
[2020-08-22 18:48:26,703 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-22 18:48:26,703 INFO  L276                IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions.
[2020-08-22 18:48:26,709 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 229
[2020-08-22 18:48:26,709 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 18:48:26,709 INFO  L422         BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 18:48:26,710 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-08-22 18:48:26,710 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 18:48:26,710 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 18:48:26,711 INFO  L82        PathProgramCache]: Analyzing trace with hash 1227428144, now seen corresponding path program 8 times
[2020-08-22 18:48:26,711 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-22 18:48:26,711 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491353315]
[2020-08-22 18:48:26,712 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 18:48:26,714 INFO  L288   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-08-22 18:48:26,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,777 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 18:48:26,778 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,779 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-22 18:48:26,822 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,873 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,915 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,925 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,945 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:26,968 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:26,971 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,014 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,016 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,018 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:27,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,022 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:27,023 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,026 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:27,029 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,033 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,034 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,035 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:27,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,044 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81
[2020-08-22 18:48:27,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,055 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,058 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,060 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:27,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,062 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:27,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,079 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134
[2020-08-22 18:48:27,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,111 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,125 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,129 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,133 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,140 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,144 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:27,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,147 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-08-22 18:48:27,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,150 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-08-22 18:48:27,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,155 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-22 18:48:27,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,157 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-08-22 18:48:27,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 18:48:27,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 384 backedges. 2 proven. 97 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked.
[2020-08-22 18:48:27,250 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491353315]
[2020-08-22 18:48:27,250 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 18:48:27,250 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2020-08-22 18:48:27,251 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992658524]
[2020-08-22 18:48:27,251 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-22 18:48:27,252 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-22 18:48:27,252 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-22 18:48:27,253 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2020-08-22 18:48:27,253 INFO  L87              Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 10 states.
[2020-08-22 18:48:27,469 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 18:48:27,470 INFO  L93              Difference]: Finished difference Result 165 states and 209 transitions.
[2020-08-22 18:48:27,470 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-08-22 18:48:27,470 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 228
[2020-08-22 18:48:27,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 18:48:27,472 INFO  L225             Difference]: With dead ends: 165
[2020-08-22 18:48:27,472 INFO  L226             Difference]: Without dead ends: 0
[2020-08-22 18:48:27,473 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210
[2020-08-22 18:48:27,474 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-08-22 18:48:27,474 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-08-22 18:48:27,474 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-08-22 18:48:27,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-08-22 18:48:27,474 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 228
[2020-08-22 18:48:27,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 18:48:27,475 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-08-22 18:48:27,475 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-22 18:48:27,475 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-08-22 18:48:27,475 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-08-22 18:48:27,475 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-08-22 18:48:27,478 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-08-22 18:48:28,538 WARN  L193               SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48
[2020-08-22 18:48:28,799 WARN  L193               SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38
[2020-08-22 18:48:29,108 WARN  L193               SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49
[2020-08-22 18:48:29,576 WARN  L193               SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45
[2020-08-22 18:48:29,948 WARN  L193               SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48
[2020-08-22 18:48:30,254 WARN  L193               SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45
[2020-08-22 18:48:30,501 WARN  L193               SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29
[2020-08-22 18:48:30,818 WARN  L193               SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29
[2020-08-22 18:48:30,872 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-08-22 18:48:30,872 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initEXIT(line -1)  the Hoare annotation is:  true
[2020-08-22 18:48:30,873 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startEXIT(line -1)  the Hoare annotation is:  true
[2020-08-22 18:48:30,873 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-08-22 18:48:30,873 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-08-22 18:48:30,875 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startFINAL(line -1)  the Hoare annotation is:  true
[2020-08-22 18:48:30,875 INFO  L264        CegarLoopResult]: At program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27)  the Hoare annotation is:  false
[2020-08-22 18:48:30,875 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 23 30)  the Hoare annotation is:  true
[2020-08-22 18:48:30,875 INFO  L264        CegarLoopResult]: At program point  L27(line 27)  the Hoare annotation is:  false
[2020-08-22 18:48:30,876 INFO  L264        CegarLoopResult]: At program point  L26(lines 26 28)  the Hoare annotation is:  (and (<= main_~x~0 5) (<= 5 main_~x~0) (<= 5 main_~result~0) (<= main_~result~0 5))
[2020-08-22 18:48:30,876 INFO  L264        CegarLoopResult]: At program point  L25(line 25)  the Hoare annotation is:  (and (<= main_~x~0 5) (<= 5 main_~x~0))
[2020-08-22 18:48:30,876 INFO  L264        CegarLoopResult]: At program point  mainEXIT(lines 23 30)  the Hoare annotation is:  (<= 5 main_~x~0)
[2020-08-22 18:48:30,876 INFO  L264        CegarLoopResult]: At program point  L25-1(line 25)  the Hoare annotation is:  (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0))
[2020-08-22 18:48:30,876 INFO  L264        CegarLoopResult]: At program point  L26-2(lines 26 28)  the Hoare annotation is:  (<= 5 main_~x~0)
[2020-08-22 18:48:30,877 INFO  L264        CegarLoopResult]: At program point  L25-2(line 25)  the Hoare annotation is:  (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0))
[2020-08-22 18:48:30,878 INFO  L264        CegarLoopResult]: At program point  L25-3(line 25)  the Hoare annotation is:  (and (<= |main_#t~ret2| 5) (<= main_~x~0 5) (<= 5 |main_#t~ret2|) (<= 5 main_~x~0) (<= 5 main_~result~0) (<= main_~result~0 5))
[2020-08-22 18:48:30,878 INFO  L264        CegarLoopResult]: At program point  mainFINAL(lines 23 30)  the Hoare annotation is:  (<= 5 main_~x~0)
[2020-08-22 18:48:30,878 INFO  L264        CegarLoopResult]: At program point  fiboEXIT(lines 5 13)  the Hoare annotation is:  (let ((.cse4 (= fibo_~n |fibo_#in~n|))) (let ((.cse0 (<= 1 |fibo_#res|)) (.cse1 (<= |fibo_#res| 1)) (.cse2 (and .cse4 (<= 6 |fibo_#in~n|))) (.cse3 (and (<= 5 |fibo_#res|) (<= 5 |fibo_#in~n|) .cse4 (<= |fibo_#res| 5)))) (and (or (and .cse0 .cse1) (<= |fibo_#in~n| 0) (not (<= |fibo_#in~n| 1))) (or .cse2 .cse3 (and (<= |fibo_#in~n| 4) (<= 4 |fibo_#in~n|)) (not (<= 2 |fibo_#in~n|)) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (and .cse0 .cse1 (<= |fibo_#in~n| 2))) (or (and (<= 0 |fibo_#res|) (<= |fibo_#res| 0)) (<= 1 |fibo_#in~n|)) (or .cse2 .cse3 (and .cse4 (<= |fibo_#in~n| 3)) (and (<= |fibo_#res| 3) .cse4 (<= 3 |fibo_#res|))))))
[2020-08-22 18:48:30,879 INFO  L264        CegarLoopResult]: At program point  fiboFINAL(lines 5 13)  the Hoare annotation is:  (let ((.cse4 (= fibo_~n |fibo_#in~n|))) (let ((.cse0 (<= 1 |fibo_#res|)) (.cse1 (<= |fibo_#res| 1)) (.cse2 (and .cse4 (<= 6 |fibo_#in~n|))) (.cse3 (and (<= 5 |fibo_#res|) (<= 5 |fibo_#in~n|) .cse4 (<= |fibo_#res| 5)))) (and (or (and .cse0 .cse1) (<= |fibo_#in~n| 0) (not (<= |fibo_#in~n| 1))) (or .cse2 .cse3 (and (<= |fibo_#in~n| 4) (<= 4 |fibo_#in~n|)) (not (<= 2 |fibo_#in~n|)) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2) (<= 3 |fibo_#in~n|)) (and .cse0 .cse1 (<= |fibo_#in~n| 2))) (or (and (<= 0 |fibo_#res|) (<= |fibo_#res| 0)) (<= 1 |fibo_#in~n|)) (or .cse2 .cse3 (and .cse4 (<= |fibo_#in~n| 3)) (and (<= |fibo_#res| 3) .cse4 (<= 3 |fibo_#res|))))))
[2020-08-22 18:48:30,879 INFO  L264        CegarLoopResult]: At program point  L11(line 11)  the Hoare annotation is:  (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|))
[2020-08-22 18:48:30,879 INFO  L264        CegarLoopResult]: At program point  L11-1(line 11)  the Hoare annotation is:  (and (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1) .cse0 (<= |fibo_#in~n| 3)) (and .cse0 (<= 6 |fibo_#in~n|)) (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)))) (not (<= |fibo_#in~n| 1)))
[2020-08-22 18:48:30,879 INFO  L264        CegarLoopResult]: At program point  L9(line 9)  the Hoare annotation is:  (and (<= |fibo_#in~n| 1) (= fibo_~n |fibo_#in~n|) (<= 1 |fibo_#in~n|))
[2020-08-22 18:48:30,880 INFO  L264        CegarLoopResult]: At program point  L11-2(line 11)  the Hoare annotation is:  (and (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 1 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 1) .cse0 (<= |fibo_#in~n| 3)) (and .cse0 (<= 6 |fibo_#in~n|)) (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)))) (not (<= |fibo_#in~n| 1)))
[2020-08-22 18:48:30,880 INFO  L264        CegarLoopResult]: At program point  L8(lines 8 12)  the Hoare annotation is:  (and (= fibo_~n |fibo_#in~n|) (<= 1 |fibo_#in~n|))
[2020-08-22 18:48:30,880 INFO  L264        CegarLoopResult]: At program point  L11-3(line 11)  the Hoare annotation is:  (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse1 (= fibo_~n |fibo_#in~n|))) (and (or (and (<= 3 |fibo_#t~ret0|) (<= .cse0 5) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse1) (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= 2 .cse0) .cse2 (<= .cse0 2) .cse3 .cse1 (<= |fibo_#in~n| 3)) (and (<= |fibo_#in~n| 4) (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse1 (<= 3 .cse0) (<= 4 |fibo_#in~n|)) (not (<= 3 |fibo_#in~n|))) (not (<= |fibo_#in~n| 1)) (or (not (<= |fibo_#in~n| 2)) (and .cse2 (<= 1 .cse0) (<= .cse0 1) .cse3 .cse1))))
[2020-08-22 18:48:30,880 INFO  L264        CegarLoopResult]: At program point  L7(line 7)  the Hoare annotation is:  (and (<= |fibo_#in~n| 0) (= fibo_~n |fibo_#in~n|))
[2020-08-22 18:48:30,881 INFO  L264        CegarLoopResult]: At program point  L11-4(line 11)  the Hoare annotation is:  (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse1 (= fibo_~n |fibo_#in~n|))) (and (or (and (<= 3 |fibo_#t~ret0|) (<= .cse0 5) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse1) (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= 2 .cse0) .cse2 (<= .cse0 2) .cse3 .cse1 (<= |fibo_#in~n| 3)) (and (<= |fibo_#in~n| 4) (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse1 (<= 3 .cse0) (<= 4 |fibo_#in~n|)) (not (<= 3 |fibo_#in~n|))) (not (<= |fibo_#in~n| 1)) (or (not (<= |fibo_#in~n| 2)) (and .cse2 (<= 1 .cse0) (<= .cse0 1) .cse3 .cse1))))
[2020-08-22 18:48:30,881 INFO  L264        CegarLoopResult]: At program point  L6(lines 6 12)  the Hoare annotation is:  (= fibo_~n |fibo_#in~n|)
[2020-08-22 18:48:30,881 INFO  L264        CegarLoopResult]: At program point  L11-5(line 11)  the Hoare annotation is:  (let ((.cse2 (<= 1 |fibo_#t~ret0|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse1 (= fibo_~n |fibo_#in~n|)) (.cse0 (+ |fibo_#t~ret0| |fibo_#t~ret1|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 |fibo_#res|) (<= .cse0 5) (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3) (<= 5 .cse0) .cse1 (<= |fibo_#res| 5)) (and (<= 2 .cse0) .cse2 (<= 2 |fibo_#res|) (<= .cse0 2) .cse3 (<= |fibo_#res| 2) .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and (<= 1 |fibo_#res|) .cse2 (<= 1 .cse0) (<= .cse0 1) (<= 2 |fibo_#in~n|) .cse3 (<= |fibo_#res| 1) (<= |fibo_#in~n| 2) .cse1) (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= fibo_~n 4) (<= .cse0 3) (<= 2 |fibo_#t~ret0|) (<= |fibo_#res| 3) (<= |fibo_#t~ret0| 2) .cse1 (<= 3 .cse0) (<= 3 |fibo_#res|) (<= 4 |fibo_#in~n|))))
[2020-08-22 18:48:30,881 INFO  L271        CegarLoopResult]: At program point  fiboENTRY(lines 5 13)  the Hoare annotation is:  true
[2020-08-22 18:48:30,882 INFO  L264        CegarLoopResult]: At program point  L11-6(line 11)  the Hoare annotation is:  (let ((.cse0 (<= |fibo_#in~n| 3))) (and (or (not (<= 3 |fibo_#in~n|)) (not .cse0) (and (<= 2 |fibo_#res|) (<= |fibo_#res| 2))) (let ((.cse1 (= fibo_~n |fibo_#in~n|))) (or (and .cse1 (<= 6 |fibo_#in~n|)) (and (<= |fibo_#in~n| 4) (<= |fibo_#res| 3) .cse1 (<= 3 |fibo_#res|)) (and (<= 5 |fibo_#res|) (<= 5 |fibo_#in~n|) .cse1 (<= |fibo_#res| 5)) (and .cse1 .cse0))) (or (not (<= |fibo_#in~n| 2)) (and (<= 1 |fibo_#res|) (<= 2 |fibo_#in~n|) (<= |fibo_#res| 1)))))
[2020-08-22 18:48:30,921 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:48:30 BoogieIcfgContainer
[2020-08-22 18:48:30,921 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-22 18:48:30,923 INFO  L168              Benchmark]: Toolchain (without parser) took 10571.56 ms. Allocated memory was 139.5 MB in the beginning and 381.7 MB in the end (delta: 242.2 MB). Free memory was 103.8 MB in the beginning and 325.6 MB in the end (delta: -221.8 MB). Peak memory consumption was 251.5 MB. Max. memory is 7.1 GB.
[2020-08-22 18:48:30,928 INFO  L168              Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB.
[2020-08-22 18:48:30,929 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 277.68 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-08-22 18:48:30,929 INFO  L168              Benchmark]: Boogie Preprocessor took 33.17 ms. Allocated memory is still 139.5 MB. Free memory was 94.6 MB in the beginning and 92.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB.
[2020-08-22 18:48:30,931 INFO  L168              Benchmark]: RCFGBuilder took 527.26 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.9 MB in the beginning and 169.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
[2020-08-22 18:48:30,938 INFO  L168              Benchmark]: TraceAbstraction took 9727.27 ms. Allocated memory was 202.9 MB in the beginning and 381.7 MB in the end (delta: 178.8 MB). Free memory was 169.5 MB in the beginning and 325.6 MB in the end (delta: -156.1 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB.
[2020-08-22 18:48:30,943 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 277.68 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 33.17 ms. Allocated memory is still 139.5 MB. Free memory was 94.6 MB in the beginning and 92.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 527.26 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.9 MB in the beginning and 169.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 9727.27 ms. Allocated memory was 202.9 MB in the beginning and 381.7 MB in the end (delta: 178.8 MB). Free memory was 169.5 MB in the beginning and 325.6 MB in the end (delta: -156.1 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - ProcedureContractResult [Line: 23]: Procedure Contract for main
    Derived contract for procedure main: 5 <= x
  - ProcedureContractResult [Line: 5]: Procedure Contract for fibo
    Derived contract for procedure fibo: (((((1 <= \result && \result <= 1) || \old(n) <= 0) || !(\old(n) <= 1)) && ((((((n == \old(n) && 6 <= \old(n)) || (((5 <= \result && 5 <= \old(n)) && n == \old(n)) && \result <= 5)) || (\old(n) <= 4 && 4 <= \old(n))) || !(2 <= \old(n))) || ((2 <= \result && \result <= 2) && 3 <= \old(n))) || ((1 <= \result && \result <= 1) && \old(n) <= 2))) && ((0 <= \result && \result <= 0) || 1 <= \old(n))) && ((((n == \old(n) && 6 <= \old(n)) || (((5 <= \result && 5 <= \old(n)) && n == \old(n)) && \result <= 5)) || (n == \old(n) && \old(n) <= 3)) || ((\result <= 3 && n == \old(n)) && 3 <= \result))
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 11, TraceHistogramMax: 25, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 361 SDtfs, 477 SDslu, 1411 SDs, 0 SdLazy, 1222 SolverSat, 210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 42 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 745 PreInvPairs, 1292 NumberOfFragments, 897 HoareAnnotationTreeSize, 745 FomulaSimplifications, 7860 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 31 FomulaSimplificationsInter, 7790 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...