java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label19_false-unreach-call.c


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This is Ultimate 0.1.23-d380424
[2018-10-24 14:08:27,603 INFO  L170        SettingsManager]: Resetting all preferences to default values...
[2018-10-24 14:08:27,605 INFO  L174        SettingsManager]: Resetting UltimateCore preferences to default values
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[2018-10-24 14:08:27,644 INFO  L174        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2018-10-24 14:08:27,663 INFO  L98         SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf
[2018-10-24 14:08:27,685 INFO  L110        SettingsManager]: Loading preferences was successful
[2018-10-24 14:08:27,685 INFO  L112        SettingsManager]: Preferences different from defaults after loading the file:
[2018-10-24 14:08:27,686 INFO  L131        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-10-24 14:08:27,686 INFO  L133        SettingsManager]:  * to procedures, called more than once=true
[2018-10-24 14:08:27,687 INFO  L131        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-10-24 14:08:27,687 INFO  L133        SettingsManager]:  * Create parallel compositions if possible=false
[2018-10-24 14:08:27,687 INFO  L133        SettingsManager]:  * Use SBE=true
[2018-10-24 14:08:27,688 INFO  L131        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-10-24 14:08:27,688 INFO  L133        SettingsManager]:  * Overapproximate operations on floating types=true
[2018-10-24 14:08:27,688 INFO  L133        SettingsManager]:  * Check division by zero=IGNORE
[2018-10-24 14:08:27,688 INFO  L133        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2018-10-24 14:08:27,689 INFO  L133        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-10-24 14:08:27,689 INFO  L133        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2018-10-24 14:08:27,689 INFO  L133        SettingsManager]:  * Check if freed pointer was valid=false
[2018-10-24 14:08:27,689 INFO  L133        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2018-10-24 14:08:27,690 INFO  L131        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-10-24 14:08:27,690 INFO  L133        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2018-10-24 14:08:27,690 INFO  L133        SettingsManager]:  * To the following directory=./dump/
[2018-10-24 14:08:27,690 INFO  L133        SettingsManager]:  * SMT solver=External_DefaultMode
[2018-10-24 14:08:27,691 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-10-24 14:08:27,691 INFO  L131        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-10-24 14:08:27,691 INFO  L133        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2018-10-24 14:08:27,691 INFO  L133        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-10-24 14:08:27,691 INFO  L133        SettingsManager]:  * Trace refinement strategy=CAMEL
[2018-10-24 14:08:27,692 INFO  L133        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2018-10-24 14:08:27,692 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-10-24 14:08:27,692 INFO  L133        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2018-10-24 14:08:27,692 INFO  L133        SettingsManager]:  * To the following directory=dump/
[2018-10-24 14:08:27,755 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2018-10-24 14:08:27,774 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-10-24 14:08:27,780 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-10-24 14:08:27,782 INFO  L271        PluginConnector]: Initializing CDTParser...
[2018-10-24 14:08:27,783 INFO  L276        PluginConnector]: CDTParser initialized
[2018-10-24 14:08:27,783 INFO  L418   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label19_false-unreach-call.c
[2018-10-24 14:08:27,856 INFO  L218              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c93748761/a797e406e7284fe08a7d0f29975b13d9/FLAG838d27030
[2018-10-24 14:08:28,635 INFO  L298              CDTParser]: Found 1 translation units.
[2018-10-24 14:08:28,636 INFO  L158              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label19_false-unreach-call.c
[2018-10-24 14:08:28,681 INFO  L346              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c93748761/a797e406e7284fe08a7d0f29975b13d9/FLAG838d27030
[2018-10-24 14:08:28,703 INFO  L354              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c93748761/a797e406e7284fe08a7d0f29975b13d9
[2018-10-24 14:08:28,719 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-10-24 14:08:28,721 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2018-10-24 14:08:28,724 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2018-10-24 14:08:28,725 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2018-10-24 14:08:28,729 INFO  L276        PluginConnector]: CACSL2BoogieTranslator initialized
[2018-10-24 14:08:28,730 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:08:28" (1/1) ...
[2018-10-24 14:08:28,734 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a508f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:28, skipping insertion in model container
[2018-10-24 14:08:28,734 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:08:28" (1/1) ...
[2018-10-24 14:08:28,745 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2018-10-24 14:08:28,925 INFO  L174         MainTranslator]: Built tables and reachable declarations
[2018-10-24 14:08:30,347 INFO  L202          PostProcessor]: Analyzing one entry point: main
[2018-10-24 14:08:30,354 INFO  L189         MainTranslator]: Completed pre-run
[2018-10-24 14:08:31,129 INFO  L202          PostProcessor]: Analyzing one entry point: main
[2018-10-24 14:08:31,165 INFO  L193         MainTranslator]: Completed translation
[2018-10-24 14:08:31,165 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31 WrapperNode
[2018-10-24 14:08:31,166 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2018-10-24 14:08:31,167 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2018-10-24 14:08:31,167 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2018-10-24 14:08:31,167 INFO  L276        PluginConnector]: Boogie Procedure Inliner initialized
[2018-10-24 14:08:31,178 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:31,272 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:31,931 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2018-10-24 14:08:31,931 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-10-24 14:08:31,932 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2018-10-24 14:08:31,932 INFO  L276        PluginConnector]: Boogie Preprocessor initialized
[2018-10-24 14:08:31,943 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:31,943 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:32,035 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:32,036 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:32,265 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:32,324 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:32,392 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
[2018-10-24 14:08:32,461 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-10-24 14:08:32,462 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-10-24 14:08:32,462 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2018-10-24 14:08:32,462 INFO  L276        PluginConnector]: RCFGBuilder initialized
[2018-10-24 14:08:32,463 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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
[2018-10-24 14:08:32,530 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2018-10-24 14:08:32,530 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2018-10-24 14:08:32,531 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2018-10-24 14:08:47,969 INFO  L341             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2018-10-24 14:08:47,970 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:08:47 BoogieIcfgContainer
[2018-10-24 14:08:47,970 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-10-24 14:08:47,971 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-10-24 14:08:47,971 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2018-10-24 14:08:47,974 INFO  L276        PluginConnector]: TraceAbstraction initialized
[2018-10-24 14:08:47,974 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:08:28" (1/3) ...
[2018-10-24 14:08:47,975 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b82e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:08:47, skipping insertion in model container
[2018-10-24 14:08:47,975 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:08:31" (2/3) ...
[2018-10-24 14:08:47,976 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b82e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:08:47, skipping insertion in model container
[2018-10-24 14:08:47,976 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:08:47" (3/3) ...
[2018-10-24 14:08:47,978 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label19_false-unreach-call.c
[2018-10-24 14:08:47,988 INFO  L136   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-10-24 14:08:47,998 INFO  L148   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-10-24 14:08:48,015 INFO  L257      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2018-10-24 14:08:48,062 INFO  L135   ementStrategyFactory]: Using default assertion order modulation
[2018-10-24 14:08:48,063 INFO  L382      AbstractCegarLoop]: Interprodecural is true
[2018-10-24 14:08:48,063 INFO  L383      AbstractCegarLoop]: Hoare is true
[2018-10-24 14:08:48,063 INFO  L384      AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-10-24 14:08:48,063 INFO  L385      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-10-24 14:08:48,063 INFO  L386      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-10-24 14:08:48,063 INFO  L387      AbstractCegarLoop]: Difference is false
[2018-10-24 14:08:48,063 INFO  L388      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-10-24 14:08:48,064 INFO  L393      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-10-24 14:08:48,106 INFO  L276                IsEmpty]: Start isEmpty. Operand 1099 states.
[2018-10-24 14:08:48,112 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2018-10-24 14:08:48,113 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:08:48,114 INFO  L375         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-10-24 14:08:48,116 INFO  L424      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:08:48,122 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:08:48,122 INFO  L82        PathProgramCache]: Analyzing trace with hash 670581594, now seen corresponding path program 1 times
[2018-10-24 14:08:48,125 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:08:48,125 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:08:48,178 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:08:48,178 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:08:48,178 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:08:48,250 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:08:48,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-24 14:08:48,528 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:08:48,529 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2018-10-24 14:08:48,535 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:08:48,552 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:08:48,552 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:08:48,555 INFO  L87              Difference]: Start difference. First operand 1099 states. Second operand 4 states.
[2018-10-24 14:09:04,219 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:09:04,219 INFO  L93              Difference]: Finished difference Result 3993 states and 7498 transitions.
[2018-10-24 14:09:04,220 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:09:04,222 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 18
[2018-10-24 14:09:04,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:09:04,274 INFO  L225             Difference]: With dead ends: 3993
[2018-10-24 14:09:04,274 INFO  L226             Difference]: Without dead ends: 2887
[2018-10-24 14:09:04,283 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:09:04,307 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2887 states.
[2018-10-24 14:09:04,447 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1936.
[2018-10-24 14:09:04,449 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1936 states.
[2018-10-24 14:09:04,458 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 3550 transitions.
[2018-10-24 14:09:04,460 INFO  L78                 Accepts]: Start accepts. Automaton has 1936 states and 3550 transitions. Word has length 18
[2018-10-24 14:09:04,460 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:09:04,460 INFO  L481      AbstractCegarLoop]: Abstraction has 1936 states and 3550 transitions.
[2018-10-24 14:09:04,460 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:09:04,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 1936 states and 3550 transitions.
[2018-10-24 14:09:04,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2018-10-24 14:09:04,467 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:09:04,467 INFO  L375         BasicCegarLoop]: trace histogram [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]
[2018-10-24 14:09:04,468 INFO  L424      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:09:04,468 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:09:04,469 INFO  L82        PathProgramCache]: Analyzing trace with hash -1916991881, now seen corresponding path program 1 times
[2018-10-24 14:09:04,469 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:09:04,469 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:09:04,470 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:04,470 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:09:04,471 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:04,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:09:04,790 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-24 14:09:04,791 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:09:04,791 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2018-10-24 14:09:04,793 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:09:04,793 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:09:04,793 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:09:04,794 INFO  L87              Difference]: Start difference. First operand 1936 states and 3550 transitions. Second operand 4 states.
[2018-10-24 14:09:17,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:09:17,753 INFO  L93              Difference]: Finished difference Result 7120 states and 13344 transitions.
[2018-10-24 14:09:17,753 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:09:17,754 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 87
[2018-10-24 14:09:17,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:09:17,784 INFO  L225             Difference]: With dead ends: 7120
[2018-10-24 14:09:17,784 INFO  L226             Difference]: Without dead ends: 5186
[2018-10-24 14:09:17,789 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:09:17,794 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5186 states.
[2018-10-24 14:09:17,868 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 3554.
[2018-10-24 14:09:17,869 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3554 states.
[2018-10-24 14:09:17,877 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 6248 transitions.
[2018-10-24 14:09:17,877 INFO  L78                 Accepts]: Start accepts. Automaton has 3554 states and 6248 transitions. Word has length 87
[2018-10-24 14:09:17,878 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:09:17,878 INFO  L481      AbstractCegarLoop]: Abstraction has 3554 states and 6248 transitions.
[2018-10-24 14:09:17,878 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:09:17,878 INFO  L276                IsEmpty]: Start isEmpty. Operand 3554 states and 6248 transitions.
[2018-10-24 14:09:17,884 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 101
[2018-10-24 14:09:17,886 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:09:17,886 INFO  L375         BasicCegarLoop]: trace histogram [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]
[2018-10-24 14:09:17,887 INFO  L424      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:09:17,887 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:09:17,887 INFO  L82        PathProgramCache]: Analyzing trace with hash 2105908058, now seen corresponding path program 1 times
[2018-10-24 14:09:17,888 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:09:17,888 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:09:17,889 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:17,889 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:09:17,889 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:17,916 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:09:18,079 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-24 14:09:18,079 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:09:18,079 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2018-10-24 14:09:18,080 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:09:18,080 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:09:18,080 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:09:18,081 INFO  L87              Difference]: Start difference. First operand 3554 states and 6248 transitions. Second operand 4 states.
[2018-10-24 14:09:28,521 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:09:28,521 INFO  L93              Difference]: Finished difference Result 12674 states and 22438 transitions.
[2018-10-24 14:09:28,522 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:09:28,522 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 100
[2018-10-24 14:09:28,523 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:09:28,570 INFO  L225             Difference]: With dead ends: 12674
[2018-10-24 14:09:28,571 INFO  L226             Difference]: Without dead ends: 9122
[2018-10-24 14:09:28,578 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:09:28,587 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9122 states.
[2018-10-24 14:09:28,746 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 9115.
[2018-10-24 14:09:28,747 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9115 states.
[2018-10-24 14:09:28,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 14199 transitions.
[2018-10-24 14:09:28,766 INFO  L78                 Accepts]: Start accepts. Automaton has 9115 states and 14199 transitions. Word has length 100
[2018-10-24 14:09:28,768 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:09:28,768 INFO  L481      AbstractCegarLoop]: Abstraction has 9115 states and 14199 transitions.
[2018-10-24 14:09:28,768 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:09:28,768 INFO  L276                IsEmpty]: Start isEmpty. Operand 9115 states and 14199 transitions.
[2018-10-24 14:09:28,778 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 122
[2018-10-24 14:09:28,778 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:09:28,778 INFO  L375         BasicCegarLoop]: trace histogram [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]
[2018-10-24 14:09:28,779 INFO  L424      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:09:28,779 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:09:28,779 INFO  L82        PathProgramCache]: Analyzing trace with hash 1681546925, now seen corresponding path program 1 times
[2018-10-24 14:09:28,779 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:09:28,779 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:09:28,783 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:28,783 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:09:28,783 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:28,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:09:29,285 WARN  L179               SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 18
[2018-10-24 14:09:29,900 WARN  L179               SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27
[2018-10-24 14:09:30,048 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-24 14:09:30,049 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:09:30,049 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:09:30,049 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-10-24 14:09:30,050 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-10-24 14:09:30,050 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2018-10-24 14:09:30,050 INFO  L87              Difference]: Start difference. First operand 9115 states and 14199 transitions. Second operand 5 states.
[2018-10-24 14:09:42,142 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:09:42,142 INFO  L93              Difference]: Finished difference Result 29264 states and 45079 transitions.
[2018-10-24 14:09:42,143 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2018-10-24 14:09:42,143 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 121
[2018-10-24 14:09:42,143 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:09:42,216 INFO  L225             Difference]: With dead ends: 29264
[2018-10-24 14:09:42,216 INFO  L226             Difference]: Without dead ends: 20151
[2018-10-24 14:09:42,233 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30
[2018-10-24 14:09:42,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20151 states.
[2018-10-24 14:09:42,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 20149.
[2018-10-24 14:09:42,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 20149 states.
[2018-10-24 14:09:42,763 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20149 states to 20149 states and 28284 transitions.
[2018-10-24 14:09:42,763 INFO  L78                 Accepts]: Start accepts. Automaton has 20149 states and 28284 transitions. Word has length 121
[2018-10-24 14:09:42,764 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:09:42,764 INFO  L481      AbstractCegarLoop]: Abstraction has 20149 states and 28284 transitions.
[2018-10-24 14:09:42,764 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-10-24 14:09:42,764 INFO  L276                IsEmpty]: Start isEmpty. Operand 20149 states and 28284 transitions.
[2018-10-24 14:09:42,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 145
[2018-10-24 14:09:42,766 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:09:42,766 INFO  L375         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-10-24 14:09:42,766 INFO  L424      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:09:42,767 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:09:42,767 INFO  L82        PathProgramCache]: Analyzing trace with hash 964067941, now seen corresponding path program 1 times
[2018-10-24 14:09:42,767 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:09:42,767 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:09:42,768 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:42,768 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:09:42,768 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:42,799 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:09:42,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-24 14:09:42,910 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:09:42,911 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2018-10-24 14:09:42,911 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 3 states
[2018-10-24 14:09:42,911 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2018-10-24 14:09:42,912 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-10-24 14:09:42,912 INFO  L87              Difference]: Start difference. First operand 20149 states and 28284 transitions. Second operand 3 states.
[2018-10-24 14:09:50,762 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:09:50,762 INFO  L93              Difference]: Finished difference Result 41070 states and 57647 transitions.
[2018-10-24 14:09:50,763 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2018-10-24 14:09:50,763 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 144
[2018-10-24 14:09:50,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:09:50,808 INFO  L225             Difference]: With dead ends: 41070
[2018-10-24 14:09:50,808 INFO  L226             Difference]: Without dead ends: 21711
[2018-10-24 14:09:50,832 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2018-10-24 14:09:50,855 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21711 states.
[2018-10-24 14:09:51,137 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21711 to 21708.
[2018-10-24 14:09:51,138 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21708 states.
[2018-10-24 14:09:51,166 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21708 states to 21708 states and 27055 transitions.
[2018-10-24 14:09:51,167 INFO  L78                 Accepts]: Start accepts. Automaton has 21708 states and 27055 transitions. Word has length 144
[2018-10-24 14:09:51,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:09:51,168 INFO  L481      AbstractCegarLoop]: Abstraction has 21708 states and 27055 transitions.
[2018-10-24 14:09:51,169 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2018-10-24 14:09:51,170 INFO  L276                IsEmpty]: Start isEmpty. Operand 21708 states and 27055 transitions.
[2018-10-24 14:09:51,175 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 262
[2018-10-24 14:09:51,175 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:09:51,176 INFO  L375         BasicCegarLoop]: trace histogram [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, 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]
[2018-10-24 14:09:51,176 INFO  L424      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:09:51,176 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:09:51,177 INFO  L82        PathProgramCache]: Analyzing trace with hash 1570115156, now seen corresponding path program 1 times
[2018-10-24 14:09:51,179 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:09:51,180 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:09:51,180 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:51,180 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:09:51,181 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:09:51,238 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:09:51,628 WARN  L179               SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7
[2018-10-24 14:09:51,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-10-24 14:09:51,725 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:09:51,725 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2018-10-24 14:09:51,725 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:09:51,726 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:09:51,726 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:09:51,726 INFO  L87              Difference]: Start difference. First operand 21708 states and 27055 transitions. Second operand 4 states.
[2018-10-24 14:10:01,637 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:10:01,637 INFO  L93              Difference]: Finished difference Result 64687 states and 81783 transitions.
[2018-10-24 14:10:01,637 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:10:01,637 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 261
[2018-10-24 14:10:01,638 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:10:01,709 INFO  L225             Difference]: With dead ends: 64687
[2018-10-24 14:10:01,710 INFO  L226             Difference]: Without dead ends: 38998
[2018-10-24 14:10:01,742 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:10:01,772 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38998 states.
[2018-10-24 14:10:02,186 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38998 to 35054.
[2018-10-24 14:10:02,186 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35054 states.
[2018-10-24 14:10:02,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35054 states to 35054 states and 41125 transitions.
[2018-10-24 14:10:02,240 INFO  L78                 Accepts]: Start accepts. Automaton has 35054 states and 41125 transitions. Word has length 261
[2018-10-24 14:10:02,240 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:10:02,240 INFO  L481      AbstractCegarLoop]: Abstraction has 35054 states and 41125 transitions.
[2018-10-24 14:10:02,240 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:10:02,241 INFO  L276                IsEmpty]: Start isEmpty. Operand 35054 states and 41125 transitions.
[2018-10-24 14:10:02,246 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 285
[2018-10-24 14:10:02,246 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:10:02,247 INFO  L375         BasicCegarLoop]: trace histogram [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, 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]
[2018-10-24 14:10:02,247 INFO  L424      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:10:02,247 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:10:02,248 INFO  L82        PathProgramCache]: Analyzing trace with hash -1991819509, now seen corresponding path program 1 times
[2018-10-24 14:10:02,248 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:10:02,248 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:10:02,249 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:02,249 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:10:02,249 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:02,293 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:10:02,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 288 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2018-10-24 14:10:02,724 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:10:02,724 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:10:02,724 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-10-24 14:10:02,725 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-10-24 14:10:02,725 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-10-24 14:10:02,725 INFO  L87              Difference]: Start difference. First operand 35054 states and 41125 transitions. Second operand 5 states.
[2018-10-24 14:10:21,818 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:10:21,819 INFO  L93              Difference]: Finished difference Result 114511 states and 134185 transitions.
[2018-10-24 14:10:21,820 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2018-10-24 14:10:21,820 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 284
[2018-10-24 14:10:21,821 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:10:21,936 INFO  L225             Difference]: With dead ends: 114511
[2018-10-24 14:10:21,936 INFO  L226             Difference]: Without dead ends: 80247
[2018-10-24 14:10:21,983 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-10-24 14:10:22,047 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80247 states.
[2018-10-24 14:10:22,860 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80247 to 76921.
[2018-10-24 14:10:22,861 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 76921 states.
[2018-10-24 14:10:22,962 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76921 states to 76921 states and 88858 transitions.
[2018-10-24 14:10:22,963 INFO  L78                 Accepts]: Start accepts. Automaton has 76921 states and 88858 transitions. Word has length 284
[2018-10-24 14:10:22,963 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:10:22,963 INFO  L481      AbstractCegarLoop]: Abstraction has 76921 states and 88858 transitions.
[2018-10-24 14:10:22,963 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-10-24 14:10:22,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 76921 states and 88858 transitions.
[2018-10-24 14:10:22,970 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 307
[2018-10-24 14:10:22,970 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:10:22,971 INFO  L375         BasicCegarLoop]: trace histogram [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, 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]
[2018-10-24 14:10:22,971 INFO  L424      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:10:22,971 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:10:22,971 INFO  L82        PathProgramCache]: Analyzing trace with hash 464366551, now seen corresponding path program 1 times
[2018-10-24 14:10:22,971 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:10:22,972 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:10:22,972 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:22,973 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:10:22,973 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:23,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:10:23,740 INFO  L134       CoverageAnalysis]: Checked inductivity of 127 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked.
[2018-10-24 14:10:23,740 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:10:23,740 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:10:23,741 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:10:23,741 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:10:23,741 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:10:23,742 INFO  L87              Difference]: Start difference. First operand 76921 states and 88858 transitions. Second operand 4 states.
[2018-10-24 14:10:36,357 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:10:36,357 INFO  L93              Difference]: Finished difference Result 161708 states and 187935 transitions.
[2018-10-24 14:10:36,357 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:10:36,357 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 306
[2018-10-24 14:10:36,358 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:10:36,473 INFO  L225             Difference]: With dead ends: 161708
[2018-10-24 14:10:36,474 INFO  L226             Difference]: Without dead ends: 85577
[2018-10-24 14:10:36,534 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:10:36,605 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85577 states.
[2018-10-24 14:10:38,090 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85577 to 83999.
[2018-10-24 14:10:38,090 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 83999 states.
[2018-10-24 14:10:38,195 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 83999 states to 83999 states and 93763 transitions.
[2018-10-24 14:10:38,195 INFO  L78                 Accepts]: Start accepts. Automaton has 83999 states and 93763 transitions. Word has length 306
[2018-10-24 14:10:38,196 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:10:38,196 INFO  L481      AbstractCegarLoop]: Abstraction has 83999 states and 93763 transitions.
[2018-10-24 14:10:38,196 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:10:38,196 INFO  L276                IsEmpty]: Start isEmpty. Operand 83999 states and 93763 transitions.
[2018-10-24 14:10:38,218 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 473
[2018-10-24 14:10:38,218 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:10:38,219 INFO  L375         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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]
[2018-10-24 14:10:38,219 INFO  L424      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:10:38,219 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:10:38,220 INFO  L82        PathProgramCache]: Analyzing trace with hash -1544791703, now seen corresponding path program 1 times
[2018-10-24 14:10:38,220 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:10:38,220 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:10:38,221 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:38,221 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:10:38,221 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:38,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:10:38,607 WARN  L179               SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4
[2018-10-24 14:10:38,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 873 backedges. 684 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked.
[2018-10-24 14:10:38,838 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:10:38,838 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:10:38,839 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:10:38,839 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:10:38,840 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:10:38,840 INFO  L87              Difference]: Start difference. First operand 83999 states and 93763 transitions. Second operand 4 states.
[2018-10-24 14:10:50,265 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:10:50,265 INFO  L93              Difference]: Finished difference Result 256261 states and 285619 transitions.
[2018-10-24 14:10:50,265 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:10:50,265 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 472
[2018-10-24 14:10:50,266 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:10:50,451 INFO  L225             Difference]: With dead ends: 256261
[2018-10-24 14:10:50,452 INFO  L226             Difference]: Without dead ends: 171472
[2018-10-24 14:10:50,520 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:10:50,632 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 171472 states.
[2018-10-24 14:10:52,545 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 171472 to 166718.
[2018-10-24 14:10:52,545 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 166718 states.
[2018-10-24 14:10:52,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 166718 states to 166718 states and 180211 transitions.
[2018-10-24 14:10:52,687 INFO  L78                 Accepts]: Start accepts. Automaton has 166718 states and 180211 transitions. Word has length 472
[2018-10-24 14:10:52,688 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:10:52,688 INFO  L481      AbstractCegarLoop]: Abstraction has 166718 states and 180211 transitions.
[2018-10-24 14:10:52,688 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:10:52,688 INFO  L276                IsEmpty]: Start isEmpty. Operand 166718 states and 180211 transitions.
[2018-10-24 14:10:52,739 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 580
[2018-10-24 14:10:52,739 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:10:52,740 INFO  L375         BasicCegarLoop]: trace histogram [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, 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, 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]
[2018-10-24 14:10:52,740 INFO  L424      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:10:52,740 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:10:52,741 INFO  L82        PathProgramCache]: Analyzing trace with hash -126964752, now seen corresponding path program 1 times
[2018-10-24 14:10:52,741 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:10:52,741 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:10:52,742 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:52,742 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:10:52,742 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:10:52,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:10:53,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 449 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2018-10-24 14:10:53,223 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:10:53,223 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:10:53,224 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:10:53,224 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:10:53,224 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:10:53,225 INFO  L87              Difference]: Start difference. First operand 166718 states and 180211 transitions. Second operand 4 states.
[2018-10-24 14:11:04,695 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:11:04,696 INFO  L93              Difference]: Finished difference Result 387809 states and 419782 transitions.
[2018-10-24 14:11:04,696 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:11:04,696 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 579
[2018-10-24 14:11:04,697 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:11:04,924 INFO  L225             Difference]: With dead ends: 387809
[2018-10-24 14:11:04,925 INFO  L226             Difference]: Without dead ends: 221090
[2018-10-24 14:11:05,023 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:11:05,165 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 221090 states.
[2018-10-24 14:11:07,875 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 221090 to 215537.
[2018-10-24 14:11:07,876 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 215537 states.
[2018-10-24 14:11:08,095 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 215537 states to 215537 states and 229511 transitions.
[2018-10-24 14:11:08,095 INFO  L78                 Accepts]: Start accepts. Automaton has 215537 states and 229511 transitions. Word has length 579
[2018-10-24 14:11:08,096 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:11:08,096 INFO  L481      AbstractCegarLoop]: Abstraction has 215537 states and 229511 transitions.
[2018-10-24 14:11:08,096 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:11:08,096 INFO  L276                IsEmpty]: Start isEmpty. Operand 215537 states and 229511 transitions.
[2018-10-24 14:11:08,126 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 665
[2018-10-24 14:11:08,126 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:11:08,127 INFO  L375         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-10-24 14:11:08,127 INFO  L424      AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:11:08,128 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:11:08,128 INFO  L82        PathProgramCache]: Analyzing trace with hash 1266617253, now seen corresponding path program 1 times
[2018-10-24 14:11:08,128 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:11:08,128 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:11:08,129 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:11:08,130 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:11:08,130 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:11:08,197 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:11:08,592 INFO  L134       CoverageAnalysis]: Checked inductivity of 961 backedges. 670 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked.
[2018-10-24 14:11:08,592 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:11:08,592 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:11:08,593 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:11:08,593 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:11:08,593 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:11:08,594 INFO  L87              Difference]: Start difference. First operand 215537 states and 229511 transitions. Second operand 4 states.
[2018-10-24 14:11:22,457 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:11:22,457 INFO  L93              Difference]: Finished difference Result 509972 states and 543191 transitions.
[2018-10-24 14:11:22,458 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:11:22,458 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 664
[2018-10-24 14:11:22,459 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:11:22,752 INFO  L225             Difference]: With dead ends: 509972
[2018-10-24 14:11:22,752 INFO  L226             Difference]: Without dead ends: 295225
[2018-10-24 14:11:22,874 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:11:23,069 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 295225 states.
[2018-10-24 14:11:28,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 295225 to 288043.
[2018-10-24 14:11:28,407 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 288043 states.
[2018-10-24 14:11:28,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 288043 states to 288043 states and 305838 transitions.
[2018-10-24 14:11:28,683 INFO  L78                 Accepts]: Start accepts. Automaton has 288043 states and 305838 transitions. Word has length 664
[2018-10-24 14:11:28,684 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:11:28,684 INFO  L481      AbstractCegarLoop]: Abstraction has 288043 states and 305838 transitions.
[2018-10-24 14:11:28,684 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:11:28,684 INFO  L276                IsEmpty]: Start isEmpty. Operand 288043 states and 305838 transitions.
[2018-10-24 14:11:28,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 695
[2018-10-24 14:11:28,706 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:11:28,707 INFO  L375         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-10-24 14:11:28,707 INFO  L424      AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:11:28,707 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:11:28,708 INFO  L82        PathProgramCache]: Analyzing trace with hash 1250965412, now seen corresponding path program 1 times
[2018-10-24 14:11:28,708 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:11:28,708 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:11:28,708 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:11:28,709 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:11:28,709 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:11:28,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:11:31,105 INFO  L134       CoverageAnalysis]: Checked inductivity of 1048 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked.
[2018-10-24 14:11:31,105 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:11:31,106 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:11:31,106 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:11:31,107 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:11:31,107 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:11:31,107 INFO  L87              Difference]: Start difference. First operand 288043 states and 305838 transitions. Second operand 4 states.
[2018-10-24 14:11:43,316 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:11:43,316 INFO  L93              Difference]: Finished difference Result 571361 states and 606759 transitions.
[2018-10-24 14:11:43,317 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2018-10-24 14:11:43,317 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 694
[2018-10-24 14:11:43,318 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:11:43,667 INFO  L225             Difference]: With dead ends: 571361
[2018-10-24 14:11:43,667 INFO  L226             Difference]: Without dead ends: 284108
[2018-10-24 14:11:43,796 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:11:43,970 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 284108 states.
[2018-10-24 14:11:46,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 284108 to 279373.
[2018-10-24 14:11:46,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 279373 states.
[2018-10-24 14:11:47,063 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 279373 states to 279373 states and 293602 transitions.
[2018-10-24 14:11:47,063 INFO  L78                 Accepts]: Start accepts. Automaton has 279373 states and 293602 transitions. Word has length 694
[2018-10-24 14:11:47,064 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:11:47,064 INFO  L481      AbstractCegarLoop]: Abstraction has 279373 states and 293602 transitions.
[2018-10-24 14:11:47,064 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:11:47,064 INFO  L276                IsEmpty]: Start isEmpty. Operand 279373 states and 293602 transitions.
[2018-10-24 14:11:47,094 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 788
[2018-10-24 14:11:47,095 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:11:47,095 INFO  L375         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 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, 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]
[2018-10-24 14:11:47,095 INFO  L424      AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:11:47,096 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:11:47,096 INFO  L82        PathProgramCache]: Analyzing trace with hash -2142948040, now seen corresponding path program 1 times
[2018-10-24 14:11:47,096 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:11:47,096 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:11:47,097 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:11:47,097 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:11:47,097 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:11:47,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:11:48,773 INFO  L134       CoverageAnalysis]: Checked inductivity of 1566 backedges. 1168 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked.
[2018-10-24 14:11:48,773 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:11:48,773 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:11:48,774 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 4 states
[2018-10-24 14:11:48,774 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2018-10-24 14:11:48,774 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:11:48,775 INFO  L87              Difference]: Start difference. First operand 279373 states and 293602 transitions. Second operand 4 states.
[2018-10-24 14:12:03,576 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-10-24 14:12:03,577 INFO  L93              Difference]: Finished difference Result 554032 states and 582431 transitions.
[2018-10-24 14:12:03,577 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2018-10-24 14:12:03,577 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 787
[2018-10-24 14:12:03,578 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-10-24 14:12:03,894 INFO  L225             Difference]: With dead ends: 554032
[2018-10-24 14:12:03,894 INFO  L226             Difference]: Without dead ends: 275449
[2018-10-24 14:12:04,007 INFO  L605         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2018-10-24 14:12:04,181 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 275449 states.
[2018-10-24 14:12:07,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 275449 to 271479.
[2018-10-24 14:12:07,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 271479 states.
[2018-10-24 14:12:07,335 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 271479 states to 271479 states and 280965 transitions.
[2018-10-24 14:12:07,335 INFO  L78                 Accepts]: Start accepts. Automaton has 271479 states and 280965 transitions. Word has length 787
[2018-10-24 14:12:07,336 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-10-24 14:12:07,336 INFO  L481      AbstractCegarLoop]: Abstraction has 271479 states and 280965 transitions.
[2018-10-24 14:12:07,336 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2018-10-24 14:12:07,336 INFO  L276                IsEmpty]: Start isEmpty. Operand 271479 states and 280965 transitions.
[2018-10-24 14:12:07,381 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 911
[2018-10-24 14:12:07,381 INFO  L367         BasicCegarLoop]: Found error trace
[2018-10-24 14:12:07,382 INFO  L375         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-10-24 14:12:07,383 INFO  L424      AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-10-24 14:12:07,383 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-10-24 14:12:07,383 INFO  L82        PathProgramCache]: Analyzing trace with hash -54212809, now seen corresponding path program 1 times
[2018-10-24 14:12:07,383 INFO  L225   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-10-24 14:12:07,383 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-10-24 14:12:07,384 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:12:07,384 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-10-24 14:12:07,384 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-10-24 14:12:07,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-10-24 14:12:09,889 INFO  L134       CoverageAnalysis]: Checked inductivity of 1628 backedges. 1207 proven. 0 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked.
[2018-10-24 14:12:09,889 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-10-24 14:12:09,889 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2018-10-24 14:12:09,890 INFO  L460      AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-10-24 14:12:09,890 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-10-24 14:12:09,890 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2018-10-24 14:12:09,891 INFO  L87              Difference]: Start difference. First operand 271479 states and 280965 transitions. Second operand 5 states.
Received shutdown request...
[2018-10-24 14:12:14,273 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2018-10-24 14:12:14,273 WARN  L550      AbstractCegarLoop]: Verification canceled
[2018-10-24 14:12:14,279 WARN  L205   ceAbstractionStarter]: Timeout
[2018-10-24 14:12:14,280 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:12:14 BoogieIcfgContainer
[2018-10-24 14:12:14,280 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2018-10-24 14:12:14,281 INFO  L168              Benchmark]: Toolchain (without parser) took 225561.33 ms. Allocated memory was 1.5 GB in the beginning and 4.3 GB in the end (delta: 2.8 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -220.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,282 INFO  L168              Benchmark]: CDTParser took 1.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,283 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 2441.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,283 INFO  L168              Benchmark]: Boogie Procedure Inliner took 764.57 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 834.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,284 INFO  L168              Benchmark]: Boogie Preprocessor took 529.92 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 68.7 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,285 INFO  L168              Benchmark]: RCFGBuilder took 15508.20 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 226.5 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 72.7 MB). Peak memory consumption was 593.4 MB. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,286 INFO  L168              Benchmark]: TraceAbstraction took 206309.05 ms. Allocated memory was 2.6 GB in the beginning and 4.3 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 418.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB.
[2018-10-24 14:12:14,294 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 1.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 2441.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB.
 * Boogie Procedure Inliner took 764.57 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 834.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 529.92 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 68.7 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 15508.20 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 226.5 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 72.7 MB). Peak memory consumption was 593.4 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 206309.05 ms. Allocated memory was 2.6 GB in the beginning and 4.3 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 418.3 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction)
    Unable to prove that call of __VERIFIER_error() unreachable (line 63). Cancelled while BasicCegarLoop was constructing difference of abstraction (271479states) and FLOYD_HOARE automaton (currently 5 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (41988 states constructedinput type IntersectNwa).
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 206.2s OverallTime, 14 OverallIterations, 7 TraceHistogramMax, 171.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10815 SDtfs, 29601 SDslu, 3077 SDs, 0 SdLazy, 61835 SolverSat, 17212 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 134.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=288043occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 22.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 37637 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 5427 NumberOfCodeBlocks, 5427 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 5413 ConstructedInterpolants, 0 QuantifiedInterpolants, 5653328 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 7145/7145 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: Timeout
Completed graceful shutdown