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_label47.c


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This is Ultimate 0.1.24-673a906-m
[2019-10-02 20:45:53,649 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-02 20:45:53,705 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
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[2019-10-02 20:45:53,720 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-02 20:45:53,721 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2019-10-02 20:45:53,721 INFO  L138        SettingsManager]:  * Log level for plugins=info
[2019-10-02 20:45:53,722 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-10-02 20:45:53,722 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-10-02 20:45:53,722 INFO  L138        SettingsManager]:  * Ignore calls to and inside polymorphic procedures=false
[2019-10-02 20:45:53,722 INFO  L138        SettingsManager]:  * Ignore calls to recursive procedures=false
[2019-10-02 20:45:53,722 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-10-02 20:45:53,723 INFO  L138        SettingsManager]:  * Abstract domain=IntervalDomain
[2019-10-02 20:45:53,723 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-02 20:45:53,723 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-02 20:45:53,724 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-02 20:45:53,724 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-02 20:45:53,724 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-02 20:45:53,724 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-02 20:45:53,724 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-02 20:45:53,725 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-02 20:45:53,725 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-02 20:45:53,725 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-02 20:45:53,725 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-02 20:45:53,725 INFO  L138        SettingsManager]:  * Remove goto edges from RCFG=true
[2019-10-02 20:45:53,726 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-02 20:45:53,726 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-02 20:45:53,726 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-02 20:45:53,726 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-02 20:45:53,726 INFO  L138        SettingsManager]:  * Trace refinement strategy=TAIPAN
[2019-10-02 20:45:53,727 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-02 20:45:53,727 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-02 20:45:53,727 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-10-02 20:45:53,760 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-02 20:45:53,774 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-02 20:45:53,778 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-02 20:45:53,779 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-02 20:45:53,780 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-02 20:45:53,780 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label47.c
[2019-10-02 20:45:53,840 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49af6da88/f9e86f5a351c4a53a4306a49c4724c6e/FLAG9decaa036
[2019-10-02 20:45:54,399 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-02 20:45:54,400 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label47.c
[2019-10-02 20:45:54,425 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49af6da88/f9e86f5a351c4a53a4306a49c4724c6e/FLAG9decaa036
[2019-10-02 20:45:54,698 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49af6da88/f9e86f5a351c4a53a4306a49c4724c6e
[2019-10-02 20:45:54,708 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-02 20:45:54,709 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-02 20:45:54,710 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-02 20:45:54,711 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-02 20:45:54,714 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-02 20:45:54,715 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:45:54" (1/1) ...
[2019-10-02 20:45:54,719 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf90c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:54, skipping insertion in model container
[2019-10-02 20:45:54,720 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:45:54" (1/1) ...
[2019-10-02 20:45:54,727 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-02 20:45:54,797 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-02 20:45:55,344 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-02 20:45:55,349 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-02 20:45:55,482 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-02 20:45:55,511 INFO  L192         MainTranslator]: Completed translation
[2019-10-02 20:45:55,511 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55 WrapperNode
[2019-10-02 20:45:55,512 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-02 20:45:55,512 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-02 20:45:55,512 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-02 20:45:55,513 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-02 20:45:55,527 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,530 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,573 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,573 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,637 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,662 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,669 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (1/1) ...
[2019-10-02 20:45:55,679 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-02 20:45:55,680 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-02 20:45:55,680 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-02 20:45:55,680 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-02 20:45:55,681 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (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 20:45:55,755 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-02 20:45:55,755 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-02 20:45:55,755 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-02 20:45:55,756 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-02 20:45:55,756 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-02 20:45:55,756 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-02 20:45:55,756 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-02 20:45:55,757 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-02 20:45:55,757 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-02 20:45:55,757 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-02 20:45:55,758 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-02 20:45:57,140 INFO  L278             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-02 20:45:57,140 INFO  L283             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-02 20:45:57,142 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:45:57 BoogieIcfgContainer
[2019-10-02 20:45:57,142 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-02 20:45:57,144 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-02 20:45:57,144 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-02 20:45:57,148 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-02 20:45:57,149 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:45:54" (1/3) ...
[2019-10-02 20:45:57,149 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446dedf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:45:57, skipping insertion in model container
[2019-10-02 20:45:57,150 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:45:55" (2/3) ...
[2019-10-02 20:45:57,150 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446dedf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:45:57, skipping insertion in model container
[2019-10-02 20:45:57,150 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:45:57" (3/3) ...
[2019-10-02 20:45:57,153 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem14_label47.c
[2019-10-02 20:45:57,166 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-02 20:45:57,178 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-02 20:45:57,195 INFO  L252      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-02 20:45:57,234 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2019-10-02 20:45:57,235 INFO  L378      AbstractCegarLoop]: Hoare is false
[2019-10-02 20:45:57,235 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-02 20:45:57,235 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-02 20:45:57,236 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-02 20:45:57,236 INFO  L382      AbstractCegarLoop]: Difference is false
[2019-10-02 20:45:57,236 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-02 20:45:57,236 INFO  L388      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-02 20:45:57,270 INFO  L276                IsEmpty]: Start isEmpty. Operand 254 states.
[2019-10-02 20:45:57,283 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2019-10-02 20:45:57,284 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:45:57,285 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]
[2019-10-02 20:45:57,288 INFO  L418      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:45:57,297 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:45:57,298 INFO  L82        PathProgramCache]: Analyzing trace with hash -1824869262, now seen corresponding path program 1 times
[2019-10-02 20:45:57,300 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:45:57,354 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:45:57,354 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:45:57,354 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:45:57,355 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:45:57,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:45:57,585 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 20:45:57,587 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-02 20:45:57,588 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-02 20:45:57,588 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:45:57,594 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-02 20:45:57,609 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-02 20:45:57,610 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-02 20:45:57,613 INFO  L87              Difference]: Start difference. First operand 254 states. Second operand 3 states.
[2019-10-02 20:45:58,920 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:45:58,921 INFO  L93              Difference]: Finished difference Result 440 states and 711 transitions.
[2019-10-02 20:45:58,921 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-02 20:45:58,922 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 39
[2019-10-02 20:45:58,923 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:45:58,948 INFO  L225             Difference]: With dead ends: 440
[2019-10-02 20:45:58,948 INFO  L226             Difference]: Without dead ends: 372
[2019-10-02 20:45:58,950 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 20:45:58,968 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 372 states.
[2019-10-02 20:45:59,020 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372.
[2019-10-02 20:45:59,022 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 372 states.
[2019-10-02 20:45:59,025 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions.
[2019-10-02 20:45:59,027 INFO  L78                 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 39
[2019-10-02 20:45:59,027 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:45:59,028 INFO  L475      AbstractCegarLoop]: Abstraction has 372 states and 602 transitions.
[2019-10-02 20:45:59,028 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-02 20:45:59,028 INFO  L276                IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions.
[2019-10-02 20:45:59,034 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 126
[2019-10-02 20:45:59,034 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:45:59,034 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, 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 20:45:59,035 INFO  L418      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:45:59,035 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:45:59,035 INFO  L82        PathProgramCache]: Analyzing trace with hash 686981166, now seen corresponding path program 1 times
[2019-10-02 20:45:59,036 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:45:59,037 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:45:59,037 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:45:59,037 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:45:59,038 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:45:59,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:45:59,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:45:59,306 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-02 20:45:59,306 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-02 20:45:59,307 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:45:59,309 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-02 20:45:59,309 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-02 20:45:59,309 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-02 20:45:59,310 INFO  L87              Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states.
[2019-10-02 20:46:00,623 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:46:00,624 INFO  L93              Difference]: Finished difference Result 570 states and 828 transitions.
[2019-10-02 20:46:00,627 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-02 20:46:00,627 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 125
[2019-10-02 20:46:00,629 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:46:00,632 INFO  L225             Difference]: With dead ends: 570
[2019-10-02 20:46:00,633 INFO  L226             Difference]: Without dead ends: 570
[2019-10-02 20:46:00,634 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 20:46:00,635 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 570 states.
[2019-10-02 20:46:00,663 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562.
[2019-10-02 20:46:00,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 562 states.
[2019-10-02 20:46:00,666 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions.
[2019-10-02 20:46:00,666 INFO  L78                 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 125
[2019-10-02 20:46:00,667 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:46:00,667 INFO  L475      AbstractCegarLoop]: Abstraction has 562 states and 814 transitions.
[2019-10-02 20:46:00,667 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-02 20:46:00,667 INFO  L276                IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions.
[2019-10-02 20:46:00,673 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2019-10-02 20:46:00,673 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:46:00,673 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, 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 20:46:00,674 INFO  L418      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:46:00,674 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:46:00,674 INFO  L82        PathProgramCache]: Analyzing trace with hash 1152023485, now seen corresponding path program 1 times
[2019-10-02 20:46:00,674 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:46:00,676 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:46:00,676 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:46:00,676 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:46:00,676 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:46:00,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:46:00,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:46:00,778 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-02 20:46:00,778 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-02 20:46:00,778 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:46:00,779 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-02 20:46:00,779 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-02 20:46:00,779 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-02 20:46:00,779 INFO  L87              Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states.
[2019-10-02 20:46:02,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:46:02,440 INFO  L93              Difference]: Finished difference Result 1664 states and 2287 transitions.
[2019-10-02 20:46:02,441 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-02 20:46:02,442 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 134
[2019-10-02 20:46:02,443 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:46:02,451 INFO  L225             Difference]: With dead ends: 1664
[2019-10-02 20:46:02,452 INFO  L226             Difference]: Without dead ends: 1664
[2019-10-02 20:46:02,452 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-02 20:46:02,454 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1664 states.
[2019-10-02 20:46:02,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664.
[2019-10-02 20:46:02,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1664 states.
[2019-10-02 20:46:02,520 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions.
[2019-10-02 20:46:02,521 INFO  L78                 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 134
[2019-10-02 20:46:02,521 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:46:02,522 INFO  L475      AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions.
[2019-10-02 20:46:02,522 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-02 20:46:02,522 INFO  L276                IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions.
[2019-10-02 20:46:02,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 263
[2019-10-02 20:46:02,536 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:46:02,537 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, 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, 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]
[2019-10-02 20:46:02,537 INFO  L418      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:46:02,537 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:46:02,537 INFO  L82        PathProgramCache]: Analyzing trace with hash 2008848013, now seen corresponding path program 1 times
[2019-10-02 20:46:02,538 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:46:02,539 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:46:02,539 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:46:02,539 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:46:02,539 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:46:02,598 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:46:02,818 INFO  L134       CoverageAnalysis]: Checked inductivity of 175 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-02 20:46:02,818 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:46:02,819 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:46:02,820 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: 
[2019-10-02 20:46:02,822 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], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [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], [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], [655], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:46:02,870 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:46:02,870 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:46:13,220 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:46:13,222 INFO  L272    AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables.
[2019-10-02 20:46:13,225 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:46:13,225 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:46:25,040 INFO  L227   lantSequenceWeakener]: Weakened 243 states. On average, predicates are now at 77.78% of their original sizes.
[2019-10-02 20:46:25,041 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:46:25,149 INFO  L420   sIntCurrentIteration]: We unified 261 AI predicates to 261
[2019-10-02 20:46:25,149 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:46:25,150 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:46:25,151 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16
[2019-10-02 20:46:25,151 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:46:25,151 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-02 20:46:25,152 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-02 20:46:25,152 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110
[2019-10-02 20:46:25,152 INFO  L87              Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 11 states.
[2019-10-02 20:48:30,695 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:51:25,690 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:51:25,690 INFO  L93              Difference]: Finished difference Result 1850 states and 2484 transitions.
[2019-10-02 20:51:25,690 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2019-10-02 20:51:25,691 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 262
[2019-10-02 20:51:25,691 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:51:25,700 INFO  L225             Difference]: With dead ends: 1850
[2019-10-02 20:51:25,701 INFO  L226             Difference]: Without dead ends: 1850
[2019-10-02 20:51:25,701 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240
[2019-10-02 20:51:25,704 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1850 states.
[2019-10-02 20:51:25,745 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1846.
[2019-10-02 20:51:25,745 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1846 states.
[2019-10-02 20:51:25,754 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2477 transitions.
[2019-10-02 20:51:25,754 INFO  L78                 Accepts]: Start accepts. Automaton has 1846 states and 2477 transitions. Word has length 262
[2019-10-02 20:51:25,755 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:51:25,755 INFO  L475      AbstractCegarLoop]: Abstraction has 1846 states and 2477 transitions.
[2019-10-02 20:51:25,755 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-02 20:51:25,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 1846 states and 2477 transitions.
[2019-10-02 20:51:25,764 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 347
[2019-10-02 20:51:25,764 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:51:25,765 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:51:25,765 INFO  L418      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:51:25,766 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:51:25,766 INFO  L82        PathProgramCache]: Analyzing trace with hash 1769612725, now seen corresponding path program 1 times
[2019-10-02 20:51:25,766 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:51:25,768 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:51:25,768 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:51:25,768 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:51:25,768 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:51:25,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:51:26,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 375 backedges. 182 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-02 20:51:26,588 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:51:26,588 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:51:26,588 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: 
[2019-10-02 20:51:26,589 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], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [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], [523], [527], [531], [535], [539], [543], [547], [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], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:51:26,594 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:51:26,595 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:51:38,464 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:51:38,466 INFO  L272    AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 484 root evaluator evaluations with a maximum evaluation depth of 13. Performed 484 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 20:51:38,466 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:51:38,466 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:51:44,567 INFO  L227   lantSequenceWeakener]: Weakened 343 states. On average, predicates are now at 77.57% of their original sizes.
[2019-10-02 20:51:44,567 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:51:44,645 INFO  L420   sIntCurrentIteration]: We unified 345 AI predicates to 345
[2019-10-02 20:51:44,645 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:51:44,646 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:51:44,646 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21
[2019-10-02 20:51:44,646 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:51:44,647 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-02 20:51:44,647 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-02 20:51:44,647 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110
[2019-10-02 20:51:44,648 INFO  L87              Difference]: Start difference. First operand 1846 states and 2477 transitions. Second operand 11 states.
[2019-10-02 20:52:17,812 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:52:44,914 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:52:44,914 INFO  L93              Difference]: Finished difference Result 2062 states and 2693 transitions.
[2019-10-02 20:52:44,914 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-02 20:52:44,915 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 346
[2019-10-02 20:52:44,916 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:52:44,926 INFO  L225             Difference]: With dead ends: 2062
[2019-10-02 20:52:44,926 INFO  L226             Difference]: Without dead ends: 1847
[2019-10-02 20:52:44,927 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 336 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 20:52:44,929 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1847 states.
[2019-10-02 20:52:44,970 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846.
[2019-10-02 20:52:44,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1846 states.
[2019-10-02 20:52:44,981 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2471 transitions.
[2019-10-02 20:52:44,981 INFO  L78                 Accepts]: Start accepts. Automaton has 1846 states and 2471 transitions. Word has length 346
[2019-10-02 20:52:44,982 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:52:44,982 INFO  L475      AbstractCegarLoop]: Abstraction has 1846 states and 2471 transitions.
[2019-10-02 20:52:44,982 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-02 20:52:44,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 1846 states and 2471 transitions.
[2019-10-02 20:52:44,992 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 373
[2019-10-02 20:52:44,992 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:52:44,993 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:52:44,993 INFO  L418      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:52:44,993 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:52:44,994 INFO  L82        PathProgramCache]: Analyzing trace with hash -376093023, now seen corresponding path program 1 times
[2019-10-02 20:52:44,994 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:52:44,995 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:52:44,995 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:52:44,996 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:52:44,996 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:52:45,050 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:52:45,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 427 backedges. 153 proven. 221 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked.
[2019-10-02 20:52:45,643 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:52:45,643 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:52:45,645 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 373 with the following transitions: 
[2019-10-02 20:52:45,650 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], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [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], [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], [655], [658], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:52:45,659 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:52:45,660 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:53:00,901 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:53:00,902 INFO  L272    AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 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 20:53:00,902 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:53:00,902 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:53:15,622 INFO  L227   lantSequenceWeakener]: Weakened 369 states. On average, predicates are now at 77.55% of their original sizes.
[2019-10-02 20:53:15,623 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:53:15,704 INFO  L420   sIntCurrentIteration]: We unified 371 AI predicates to 371
[2019-10-02 20:53:15,705 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:53:15,705 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:53:15,705 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17
[2019-10-02 20:53:15,705 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:53:15,706 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-02 20:53:15,706 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-02 20:53:15,706 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2019-10-02 20:53:15,706 INFO  L87              Difference]: Start difference. First operand 1846 states and 2471 transitions. Second operand 11 states.
[2019-10-02 20:53:57,034 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:55:07,669 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:55:07,669 INFO  L93              Difference]: Finished difference Result 2032 states and 2671 transitions.
[2019-10-02 20:55:07,670 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2019-10-02 20:55:07,670 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 372
[2019-10-02 20:55:07,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:55:07,679 INFO  L225             Difference]: With dead ends: 2032
[2019-10-02 20:55:07,680 INFO  L226             Difference]: Without dead ends: 2032
[2019-10-02 20:55:07,680 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 362 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 20:55:07,682 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2032 states.
[2019-10-02 20:55:07,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2030.
[2019-10-02 20:55:07,722 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2030 states.
[2019-10-02 20:55:07,729 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2669 transitions.
[2019-10-02 20:55:07,729 INFO  L78                 Accepts]: Start accepts. Automaton has 2030 states and 2669 transitions. Word has length 372
[2019-10-02 20:55:07,730 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:55:07,730 INFO  L475      AbstractCegarLoop]: Abstraction has 2030 states and 2669 transitions.
[2019-10-02 20:55:07,730 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-02 20:55:07,730 INFO  L276                IsEmpty]: Start isEmpty. Operand 2030 states and 2669 transitions.
[2019-10-02 20:55:07,741 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 457
[2019-10-02 20:55:07,741 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:55:07,742 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:55:07,742 INFO  L418      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:55:07,742 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:55:07,742 INFO  L82        PathProgramCache]: Analyzing trace with hash -1458347063, now seen corresponding path program 1 times
[2019-10-02 20:55:07,743 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:55:07,744 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:55:07,744 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:55:07,744 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:55:07,744 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:55:07,778 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:55:08,038 INFO  L134       CoverageAnalysis]: Checked inductivity of 711 backedges. 218 proven. 166 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked.
[2019-10-02 20:55:08,038 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:55:08,039 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:55:08,039 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 457 with the following transitions: 
[2019-10-02 20:55:08,039 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], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [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], [523], [527], [531], [535], [539], [543], [547], [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], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:55:08,042 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:55:08,042 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:55:31,751 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:55:31,752 INFO  L272    AbstractInterpreter]: Visited 122 different actions 481 times. Merged at 6 different actions 23 times. Never widened. Performed 946 root evaluator evaluations with a maximum evaluation depth of 13. Performed 946 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 5 fixpoints after 3 different actions. Largest state had 24 variables.
[2019-10-02 20:55:31,752 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:55:31,752 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:55:38,469 INFO  L227   lantSequenceWeakener]: Weakened 453 states. On average, predicates are now at 77.51% of their original sizes.
[2019-10-02 20:55:38,470 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:55:38,546 INFO  L420   sIntCurrentIteration]: We unified 455 AI predicates to 455
[2019-10-02 20:55:38,546 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:55:38,547 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:55:38,547 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14
[2019-10-02 20:55:38,547 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:55:38,548 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-10-02 20:55:38,548 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-10-02 20:55:38,548 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2019-10-02 20:55:38,549 INFO  L87              Difference]: Start difference. First operand 2030 states and 2669 transitions. Second operand 10 states.
[2019-10-02 20:56:12,870 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:56:47,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-02 20:56:47,506 INFO  L93              Difference]: Finished difference Result 2217 states and 2855 transitions.
[2019-10-02 20:56:47,506 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-02 20:56:47,506 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 456
[2019-10-02 20:56:47,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-02 20:56:47,516 INFO  L225             Difference]: With dead ends: 2217
[2019-10-02 20:56:47,516 INFO  L226             Difference]: Without dead ends: 2032
[2019-10-02 20:56:47,516 INFO  L640         BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272
[2019-10-02 20:56:47,518 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2032 states.
[2019-10-02 20:56:47,555 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2030.
[2019-10-02 20:56:47,556 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2030 states.
[2019-10-02 20:56:47,562 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2658 transitions.
[2019-10-02 20:56:47,562 INFO  L78                 Accepts]: Start accepts. Automaton has 2030 states and 2658 transitions. Word has length 456
[2019-10-02 20:56:47,563 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-02 20:56:47,563 INFO  L475      AbstractCegarLoop]: Abstraction has 2030 states and 2658 transitions.
[2019-10-02 20:56:47,563 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-10-02 20:56:47,563 INFO  L276                IsEmpty]: Start isEmpty. Operand 2030 states and 2658 transitions.
[2019-10-02 20:56:47,569 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 482
[2019-10-02 20:56:47,569 INFO  L403         BasicCegarLoop]: Found error trace
[2019-10-02 20:56:47,569 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-02 20:56:47,570 INFO  L418      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-02 20:56:47,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:56:47,570 INFO  L82        PathProgramCache]: Analyzing trace with hash -358273966, now seen corresponding path program 1 times
[2019-10-02 20:56:47,570 INFO  L69    tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy
[2019-10-02 20:56:47,572 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:56:47,572 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-02 20:56:47,572 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-02 20:56:47,572 INFO  L289   anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation)
[2019-10-02 20:56:47,627 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-02 20:56:48,213 INFO  L134       CoverageAnalysis]: Checked inductivity of 786 backedges. 356 proven. 111 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked.
[2019-10-02 20:56:48,214 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-10-02 20:56:48,214 INFO  L193   anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION
[2019-10-02 20:56:48,215 INFO  L205      CegarAbsIntRunner]: Running AI on error trace of length 482 with the following transitions: 
[2019-10-02 20:56:48,215 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], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [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], [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], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977]
[2019-10-02 20:56:48,218 INFO  L148    AbstractInterpreter]: Using domain IntervalDomain
[2019-10-02 20:56:48,218 INFO  L101         FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)
[2019-10-02 20:57:02,213 WARN  L79         EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.
[2019-10-02 20:57:22,874 INFO  L266    AbstractInterpreter]: Error location(s) were unreachable
[2019-10-02 20:57:22,875 INFO  L272    AbstractInterpreter]: Visited 122 different actions 477 times. Merged at 6 different actions 19 times. Never widened. Performed 1015 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1015 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables.
[2019-10-02 20:57:22,875 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-02 20:57:22,875 INFO  L403   sIntCurrentIteration]: Generating AbsInt predicates
[2019-10-02 20:57:44,144 INFO  L227   lantSequenceWeakener]: Weakened 478 states. On average, predicates are now at 77.5% of their original sizes.
[2019-10-02 20:57:44,144 INFO  L418   sIntCurrentIteration]: Unifying AI predicates
[2019-10-02 20:57:44,230 INFO  L420   sIntCurrentIteration]: We unified 480 AI predicates to 480
[2019-10-02 20:57:44,230 INFO  L429   sIntCurrentIteration]: Finished generation of AbsInt predicates
[2019-10-02 20:57:44,231 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-02 20:57:44,231 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15
[2019-10-02 20:57:44,231 INFO  L257   anRefinementStrategy]: Using the first perfect interpolant sequence
[2019-10-02 20:57:44,232 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-10-02 20:57:44,232 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-10-02 20:57:44,232 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2019-10-02 20:57:44,233 INFO  L87              Difference]: Start difference. First operand 2030 states and 2658 transitions. Second operand 10 states.