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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label16.c


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This is Ultimate 0.1.24-673a906-m
[2019-10-02 20:30:57,481 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-02 20:30:57,531 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf
[2019-10-02 20:30:57,547 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-02 20:30:57,547 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-02 20:30:57,547 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2019-10-02 20:30:57,548 INFO  L138        SettingsManager]:  * Log level for plugins=info
[2019-10-02 20:30:57,548 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-10-02 20:30:57,548 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-10-02 20:30:57,549 INFO  L138        SettingsManager]:  * Ignore calls to and inside polymorphic procedures=false
[2019-10-02 20:30:57,549 INFO  L138        SettingsManager]:  * Ignore calls to recursive procedures=false
[2019-10-02 20:30:57,549 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-10-02 20:30:57,549 INFO  L138        SettingsManager]:  * Abstract domain=IntervalDomain
[2019-10-02 20:30:57,550 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-02 20:30:57,550 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-02 20:30:57,550 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-02 20:30:57,551 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-02 20:30:57,551 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-02 20:30:57,551 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-02 20:30:57,551 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-02 20:30:57,551 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-02 20:30:57,551 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-02 20:30:57,552 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-02 20:30:57,552 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-02 20:30:57,552 INFO  L138        SettingsManager]:  * Remove goto edges from RCFG=true
[2019-10-02 20:30:57,552 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-02 20:30:57,553 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-02 20:30:57,553 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-02 20:30:57,553 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-02 20:30:57,553 INFO  L138        SettingsManager]:  * Trace refinement strategy=TAIPAN
[2019-10-02 20:30:57,553 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-02 20:30:57,554 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-02 20:30:57,554 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-10-02 20:30:57,595 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-02 20:30:57,609 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-02 20:30:57,613 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-02 20:30:57,614 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-02 20:30:57,614 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-02 20:30:57,615 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label16.c
[2019-10-02 20:30:57,678 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d526800a/b2e7263bb0a8413eba2ecc906ed9dfca/FLAGa564fbb46
[2019-10-02 20:30:58,241 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-02 20:30:58,244 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label16.c
[2019-10-02 20:30:58,260 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d526800a/b2e7263bb0a8413eba2ecc906ed9dfca/FLAGa564fbb46
[2019-10-02 20:30:58,481 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d526800a/b2e7263bb0a8413eba2ecc906ed9dfca
[2019-10-02 20:30:58,491 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-02 20:30:58,493 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-02 20:30:58,494 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-02 20:30:58,494 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-02 20:30:58,498 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-02 20:30:58,499 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:30:58" (1/1) ...
[2019-10-02 20:30:58,502 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7354cb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:58, skipping insertion in model container
[2019-10-02 20:30:58,502 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:30:58" (1/1) ...
[2019-10-02 20:30:58,510 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-02 20:30:58,559 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-02 20:30:59,158 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-02 20:30:59,164 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-02 20:30:59,339 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-02 20:30:59,356 INFO  L192         MainTranslator]: Completed translation
[2019-10-02 20:30:59,357 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59 WrapperNode
[2019-10-02 20:30:59,357 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-02 20:30:59,358 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-02 20:30:59,358 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-02 20:30:59,358 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-02 20:30:59,372 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,373 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,399 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,399 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,452 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,479 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,494 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (1/1) ...
[2019-10-02 20:30:59,507 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-02 20:30:59,508 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-02 20:30:59,508 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-02 20:30:59,508 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-02 20:30:59,509 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (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
[2019-10-02 20:30:59,591 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-02 20:30:59,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-02 20:30:59,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-02 20:30:59,592 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-02 20:30:59,592 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-02 20:30:59,592 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-02 20:30:59,593 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-02 20:30:59,593 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-02 20:30:59,593 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-02 20:30:59,593 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-02 20:30:59,594 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-02 20:31:01,044 INFO  L278             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-02 20:31:01,045 INFO  L283             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-02 20:31:01,046 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:31:01 BoogieIcfgContainer
[2019-10-02 20:31:01,047 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-02 20:31:01,048 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-02 20:31:01,048 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-02 20:31:01,052 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-02 20:31:01,052 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:30:58" (1/3) ...
[2019-10-02 20:31:01,053 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263e5ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:31:01, skipping insertion in model container
[2019-10-02 20:31:01,053 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:30:59" (2/3) ...
[2019-10-02 20:31:01,054 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263e5ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:31:01, skipping insertion in model container
[2019-10-02 20:31:01,054 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:31:01" (3/3) ...
[2019-10-02 20:31:01,058 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem14_label16.c
[2019-10-02 20:31:01,069 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-02 20:31:01,079 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-02 20:31:01,096 INFO  L252      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-02 20:31:01,134 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2019-10-02 20:31:01,134 INFO  L378      AbstractCegarLoop]: Hoare is false
[2019-10-02 20:31:01,134 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-02 20:31:01,134 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-02 20:31:01,135 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-02 20:31:01,135 INFO  L382      AbstractCegarLoop]: Difference is false
[2019-10-02 20:31:01,135 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-02 20:31:01,135 INFO  L388      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-02 20:31:01,159 INFO  L276                IsEmpty]: Start isEmpty. Operand 254 states.
[2019-10-02 20:31:01,171 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2019-10-02 20:31:01,171 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:31:01,173 INFO  L411         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:31:01,175 INFO  L418      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:31:01,181 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:31:01,181 INFO  L82        PathProgramCache]: Analyzing trace with hash 27238371, now seen corresponding path program 1 times
[2019-10-02 20:31:01,184 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:31:01,230 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:01,231 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:31:01,231 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:01,231 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:31:01,307 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:31:01,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:31:01,489 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-02 20:31:01,490 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-02 20:31:01,490 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:31:01,496 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-02 20:31:01,511 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-02 20:31:01,513 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-02 20:31:01,515 INFO  L87              Difference]: Start difference. First operand 254 states. Second operand 3 states.
[2019-10-02 20:31:02,805 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:31:02,805 INFO  L93              Difference]: Finished difference Result 440 states and 713 transitions.
[2019-10-02 20:31:02,806 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-02 20:31:02,807 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 52
[2019-10-02 20:31:02,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:31:02,826 INFO  L225             Difference]: With dead ends: 440
[2019-10-02 20:31:02,826 INFO  L226             Difference]: Without dead ends: 372
[2019-10-02 20:31:02,828 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-02 20:31:02,849 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 372 states.
[2019-10-02 20:31:02,897 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372.
[2019-10-02 20:31:02,899 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 372 states.
[2019-10-02 20:31:02,901 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 596 transitions.
[2019-10-02 20:31:02,903 INFO  L78                 Accepts]: Start accepts. Automaton has 372 states and 596 transitions. Word has length 52
[2019-10-02 20:31:02,903 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:31:02,903 INFO  L475      AbstractCegarLoop]: Abstraction has 372 states and 596 transitions.
[2019-10-02 20:31:02,904 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-02 20:31:02,904 INFO  L276                IsEmpty]: Start isEmpty. Operand 372 states and 596 transitions.
[2019-10-02 20:31:02,910 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 129
[2019-10-02 20:31:02,910 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:31:02,911 INFO  L411         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:31:02,911 INFO  L418      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:31:02,911 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:31:02,911 INFO  L82        PathProgramCache]: Analyzing trace with hash -831044326, now seen corresponding path program 1 times
[2019-10-02 20:31:02,912 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:31:02,913 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:02,913 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:31:02,913 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:02,914 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:31:02,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:31:03,108 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:31:03,109 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-02 20:31:03,109 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-02 20:31:03,109 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:31:03,112 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-02 20:31:03,113 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-02 20:31:03,114 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-02 20:31:03,114 INFO  L87              Difference]: Start difference. First operand 372 states and 596 transitions. Second operand 5 states.
[2019-10-02 20:31:04,498 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:31:04,498 INFO  L93              Difference]: Finished difference Result 574 states and 848 transitions.
[2019-10-02 20:31:04,500 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-02 20:31:04,500 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 128
[2019-10-02 20:31:04,501 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:31:04,530 INFO  L225             Difference]: With dead ends: 574
[2019-10-02 20:31:04,530 INFO  L226             Difference]: Without dead ends: 574
[2019-10-02 20:31:04,531 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2019-10-02 20:31:04,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 574 states.
[2019-10-02 20:31:04,583 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564.
[2019-10-02 20:31:04,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 564 states.
[2019-10-02 20:31:04,588 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 831 transitions.
[2019-10-02 20:31:04,588 INFO  L78                 Accepts]: Start accepts. Automaton has 564 states and 831 transitions. Word has length 128
[2019-10-02 20:31:04,588 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:31:04,589 INFO  L475      AbstractCegarLoop]: Abstraction has 564 states and 831 transitions.
[2019-10-02 20:31:04,589 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-02 20:31:04,589 INFO  L276                IsEmpty]: Start isEmpty. Operand 564 states and 831 transitions.
[2019-10-02 20:31:04,600 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 193
[2019-10-02 20:31:04,600 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:31:04,601 INFO  L411         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:31:04,602 INFO  L418      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:31:04,602 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:31:04,602 INFO  L82        PathProgramCache]: Analyzing trace with hash 1296359578, now seen corresponding path program 1 times
[2019-10-02 20:31:04,603 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:31:04,605 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:04,606 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:31:04,606 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:04,606 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:31:04,692 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:31:04,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:31:04,947 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-02 20:31:04,948 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-02 20:31:04,948 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:31:04,952 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-02 20:31:04,952 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-02 20:31:04,952 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-02 20:31:04,952 INFO  L87              Difference]: Start difference. First operand 564 states and 831 transitions. Second operand 6 states.
[2019-10-02 20:31:06,536 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:31:06,538 INFO  L93              Difference]: Finished difference Result 968 states and 1421 transitions.
[2019-10-02 20:31:06,539 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-02 20:31:06,539 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 192
[2019-10-02 20:31:06,540 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:31:06,546 INFO  L225             Difference]: With dead ends: 968
[2019-10-02 20:31:06,546 INFO  L226             Difference]: Without dead ends: 968
[2019-10-02 20:31:06,547 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-10-02 20:31:06,549 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 968 states.
[2019-10-02 20:31:06,581 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 942.
[2019-10-02 20:31:06,581 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 942 states.
[2019-10-02 20:31:06,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1352 transitions.
[2019-10-02 20:31:06,586 INFO  L78                 Accepts]: Start accepts. Automaton has 942 states and 1352 transitions. Word has length 192
[2019-10-02 20:31:06,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:31:06,587 INFO  L475      AbstractCegarLoop]: Abstraction has 942 states and 1352 transitions.
[2019-10-02 20:31:06,587 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-02 20:31:06,588 INFO  L276                IsEmpty]: Start isEmpty. Operand 942 states and 1352 transitions.
[2019-10-02 20:31:06,592 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 212
[2019-10-02 20:31:06,592 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:31:06,592 INFO  L411         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:31:06,593 INFO  L418      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:31:06,593 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:31:06,593 INFO  L82        PathProgramCache]: Analyzing trace with hash 1245763624, now seen corresponding path program 1 times
[2019-10-02 20:31:06,593 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:31:06,595 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:06,595 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:31:06,595 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:31:06,595 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:31:06,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:31:06,802 INFO  L134       CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:31:06,803 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:31:06,803 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:31:06,804 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: 
[2019-10-02 20:31:06,807 INFO  L207      CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:31:06,900 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:31:06,901 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:31:10,997 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:31:10,999 INFO  L272    AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables.
[2019-10-02 20:31:11,003 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:31:11,003 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:31:14,695 INFO  L227   lantSequenceWeakener]: Weakened 192 states. On average, predicates are now at 78.23% of their original sizes.
[2019-10-02 20:31:14,695 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:31:14,768 INFO  L420   sIntCurrentIteration]: We unified 210 AI predicates to 210
[2019-10-02 20:31:14,768 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:31:14,769 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:31:14,769 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14
[2019-10-02 20:31:14,770 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:31:14,770 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-10-02 20:31:14,771 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-10-02 20:31:14,771 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90
[2019-10-02 20:31:14,771 INFO  L87              Difference]: Start difference. First operand 942 states and 1352 transitions. Second operand 10 states.
[2019-10-02 20:32:38,325 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:34:29,114 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:34:29,114 INFO  L93              Difference]: Finished difference Result 1128 states and 1547 transitions.
[2019-10-02 20:34:29,114 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2019-10-02 20:34:29,114 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 211
[2019-10-02 20:34:29,115 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:34:29,120 INFO  L225             Difference]: With dead ends: 1128
[2019-10-02 20:34:29,121 INFO  L226             Difference]: Without dead ends: 1128
[2019-10-02 20:34:29,121 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182
[2019-10-02 20:34:29,123 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1128 states.
[2019-10-02 20:34:29,146 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1124.
[2019-10-02 20:34:29,146 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1124 states.
[2019-10-02 20:34:29,152 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1541 transitions.
[2019-10-02 20:34:29,152 INFO  L78                 Accepts]: Start accepts. Automaton has 1124 states and 1541 transitions. Word has length 211
[2019-10-02 20:34:29,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:34:29,153 INFO  L475      AbstractCegarLoop]: Abstraction has 1124 states and 1541 transitions.
[2019-10-02 20:34:29,153 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-10-02 20:34:29,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 1124 states and 1541 transitions.
[2019-10-02 20:34:29,158 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 296
[2019-10-02 20:34:29,158 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:34:29,159 INFO  L411         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:34:29,159 INFO  L418      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:34:29,159 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:34:29,160 INFO  L82        PathProgramCache]: Analyzing trace with hash 1932581537, now seen corresponding path program 1 times
[2019-10-02 20:34:29,160 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:34:29,165 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:34:29,166 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:34:29,166 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:34:29,166 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:34:29,211 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:34:29,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 370 backedges. 220 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-02 20:34:29,798 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:34:29,798 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:34:29,799 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: 
[2019-10-02 20:34:29,799 INFO  L207      CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:34:29,806 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:34:29,806 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:34:32,958 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:34:32,959 INFO  L272    AbstractInterpreter]: Visited 93 different actions 181 times. Merged at 4 different actions 5 times. Never widened. Performed 400 root evaluator evaluations with a maximum evaluation depth of 13. Performed 400 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables.
[2019-10-02 20:34:32,960 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:34:32,960 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:34:35,304 INFO  L227   lantSequenceWeakener]: Weakened 292 states. On average, predicates are now at 77.82% of their original sizes.
[2019-10-02 20:34:35,305 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:34:35,374 INFO  L420   sIntCurrentIteration]: We unified 294 AI predicates to 294
[2019-10-02 20:34:35,375 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:34:35,375 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:34:35,375 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21
[2019-10-02 20:34:35,376 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:34:35,376 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-02 20:34:35,377 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-02 20:34:35,377 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2019-10-02 20:34:35,377 INFO  L87              Difference]: Start difference. First operand 1124 states and 1541 transitions. Second operand 11 states.
[2019-10-02 20:35:09,230 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:38:51,329 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:38:51,330 INFO  L93              Difference]: Finished difference Result 1340 states and 1768 transitions.
[2019-10-02 20:38:51,330 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-02 20:38:51,330 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 295
[2019-10-02 20:38:51,332 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:38:51,340 INFO  L225             Difference]: With dead ends: 1340
[2019-10-02 20:38:51,341 INFO  L226             Difference]: Without dead ends: 1340
[2019-10-02 20:38:51,341 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306
[2019-10-02 20:38:51,344 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1340 states.
[2019-10-02 20:38:51,385 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1124.
[2019-10-02 20:38:51,385 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1124 states.
[2019-10-02 20:38:51,393 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1541 transitions.
[2019-10-02 20:38:51,394 INFO  L78                 Accepts]: Start accepts. Automaton has 1124 states and 1541 transitions. Word has length 295
[2019-10-02 20:38:51,395 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:38:51,395 INFO  L475      AbstractCegarLoop]: Abstraction has 1124 states and 1541 transitions.
[2019-10-02 20:38:51,395 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-02 20:38:51,395 INFO  L276                IsEmpty]: Start isEmpty. Operand 1124 states and 1541 transitions.
[2019-10-02 20:38:51,401 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 322
[2019-10-02 20:38:51,402 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:38:51,402 INFO  L411         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:38:51,403 INFO  L418      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:38:51,403 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:38:51,403 INFO  L82        PathProgramCache]: Analyzing trace with hash -754073099, now seen corresponding path program 1 times
[2019-10-02 20:38:51,404 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:38:51,405 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:38:51,406 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:38:51,406 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:38:51,407 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:38:51,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:38:51,828 INFO  L134       CoverageAnalysis]: Checked inductivity of 370 backedges. 192 proven. 125 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked.
[2019-10-02 20:38:51,829 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:38:51,829 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:38:51,829 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 322 with the following transitions: 
[2019-10-02 20:38:51,829 INFO  L207      CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:38:51,834 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:38:51,834 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:39:06,161 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:39:06,161 INFO  L272    AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 557 root evaluator evaluations with a maximum evaluation depth of 13. Performed 557 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables.
[2019-10-02 20:39:06,162 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:39:06,162 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:39:13,972 INFO  L227   lantSequenceWeakener]: Weakened 318 states. On average, predicates are now at 77.78% of their original sizes.
[2019-10-02 20:39:13,973 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:39:14,053 INFO  L420   sIntCurrentIteration]: We unified 320 AI predicates to 320
[2019-10-02 20:39:14,053 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:39:14,053 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:39:14,053 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17
[2019-10-02 20:39:14,054 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:39:14,054 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-02 20:39:14,054 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-02 20:39:14,055 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2019-10-02 20:39:14,055 INFO  L87              Difference]: Start difference. First operand 1124 states and 1541 transitions. Second operand 11 states.
[2019-10-02 20:39:56,476 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:41:09,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:41:09,470 INFO  L93              Difference]: Finished difference Result 1492 states and 1931 transitions.
[2019-10-02 20:41:09,470 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2019-10-02 20:41:09,471 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 321
[2019-10-02 20:41:09,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:41:09,478 INFO  L225             Difference]: With dead ends: 1492
[2019-10-02 20:41:09,478 INFO  L226             Difference]: Without dead ends: 1492
[2019-10-02 20:41:09,479 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342
[2019-10-02 20:41:09,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1492 states.
[2019-10-02 20:41:09,509 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1490.
[2019-10-02 20:41:09,509 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1490 states.
[2019-10-02 20:41:09,515 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1929 transitions.
[2019-10-02 20:41:09,515 INFO  L78                 Accepts]: Start accepts. Automaton has 1490 states and 1929 transitions. Word has length 321
[2019-10-02 20:41:09,515 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:41:09,516 INFO  L475      AbstractCegarLoop]: Abstraction has 1490 states and 1929 transitions.
[2019-10-02 20:41:09,516 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-02 20:41:09,516 INFO  L276                IsEmpty]: Start isEmpty. Operand 1490 states and 1929 transitions.
[2019-10-02 20:41:09,522 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 348
[2019-10-02 20:41:09,522 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:41:09,523 INFO  L411         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:41:09,523 INFO  L418      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:41:09,523 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:41:09,524 INFO  L82        PathProgramCache]: Analyzing trace with hash -1337167711, now seen corresponding path program 1 times
[2019-10-02 20:41:09,524 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:41:09,525 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:41:09,525 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:41:09,525 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:41:09,525 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:41:09,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:41:09,795 INFO  L134       CoverageAnalysis]: Checked inductivity of 396 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked.
[2019-10-02 20:41:09,795 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:41:09,796 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:41:09,796 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: 
[2019-10-02 20:41:09,798 INFO  L207      CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:41:09,810 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:41:09,810 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:41:23,440 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:41:50,647 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:41:50,647 INFO  L272    AbstractInterpreter]: Visited 119 different actions 580 times. Merged at 6 different actions 25 times. Never widened. Performed 1147 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1147 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 5 fixpoints after 2 different actions. Largest state had 24 variables.
[2019-10-02 20:41:50,648 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:41:50,648 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:41:58,155 INFO  L227   lantSequenceWeakener]: Weakened 344 states. On average, predicates are now at 77.74% of their original sizes.
[2019-10-02 20:41:58,155 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:41:58,238 INFO  L420   sIntCurrentIteration]: We unified 346 AI predicates to 346
[2019-10-02 20:41:58,239 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:41:58,239 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:41:58,239 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15
[2019-10-02 20:41:58,239 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:41:58,240 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-10-02 20:41:58,240 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-10-02 20:41:58,241 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2019-10-02 20:41:58,241 INFO  L87              Difference]: Start difference. First operand 1490 states and 1929 transitions. Second operand 10 states.
[2019-10-02 20:44:42,228 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:44:42,228 INFO  L93              Difference]: Finished difference Result 1683 states and 2160 transitions.
[2019-10-02 20:44:42,229 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2019-10-02 20:44:42,229 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 347
[2019-10-02 20:44:42,230 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:44:42,249 INFO  L225             Difference]: With dead ends: 1683
[2019-10-02 20:44:42,249 INFO  L226             Difference]: Without dead ends: 1683
[2019-10-02 20:44:42,250 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306
[2019-10-02 20:44:42,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1683 states.
[2019-10-02 20:44:42,287 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1676.
[2019-10-02 20:44:42,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-10-02 20:44:42,294 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2153 transitions.
[2019-10-02 20:44:42,294 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 2153 transitions. Word has length 347
[2019-10-02 20:44:42,295 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:44:42,295 INFO  L475      AbstractCegarLoop]: Abstraction has 1676 states and 2153 transitions.
[2019-10-02 20:44:42,295 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-10-02 20:44:42,295 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 2153 transitions.
[2019-10-02 20:44:42,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 406
[2019-10-02 20:44:42,304 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:44:42,305 INFO  L411         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:44:42,305 INFO  L418      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:44:42,305 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:44:42,305 INFO  L82        PathProgramCache]: Analyzing trace with hash -223080274, now seen corresponding path program 1 times
[2019-10-02 20:44:42,306 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:44:42,307 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:44:42,307 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:44:42,307 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:44:42,307 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:44:42,342 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:44:42,573 INFO  L134       CoverageAnalysis]: Checked inductivity of 658 backedges. 270 proven. 157 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked.
[2019-10-02 20:44:42,573 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:44:42,573 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:44:42,574 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 406 with the following transitions: 
[2019-10-02 20:44:42,575 INFO  L207      CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:44:42,580 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:44:42,580 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:45:01,754 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:45:01,755 INFO  L272    AbstractInterpreter]: Visited 120 different actions 472 times. Merged at 6 different actions 22 times. Never widened. Performed 847 root evaluator evaluations with a maximum evaluation depth of 13. Performed 847 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 5 fixpoints after 2 different actions. Largest state had 24 variables.
[2019-10-02 20:45:01,755 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:45:01,755 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:45:05,390 INFO  L227   lantSequenceWeakener]: Weakened 402 states. On average, predicates are now at 77.68% of their original sizes.
[2019-10-02 20:45:05,390 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:45:05,446 INFO  L420   sIntCurrentIteration]: We unified 404 AI predicates to 404
[2019-10-02 20:45:05,446 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:45:05,447 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:45:05,447 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14
[2019-10-02 20:45:05,447 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:45:05,448 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-10-02 20:45:05,448 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-10-02 20:45:05,449 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2019-10-02 20:45:05,449 INFO  L87              Difference]: Start difference. First operand 1676 states and 2153 transitions. Second operand 10 states.