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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.5.3.ufo.UNBOUNDED.pals.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.24-112bae1
[2019-09-08 08:26:22,074 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-09-08 08:26:22,076 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-09-08 08:26:22,089 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-09-08 08:26:22,090 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2019-09-08 08:26:22,103 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2019-09-08 08:26:22,105 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-09-08 08:26:22,107 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-09-08 08:26:22,109 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-09-08 08:26:22,110 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-09-08 08:26:22,111 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
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[2019-09-08 08:26:22,124 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-09-08 08:26:22,124 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-09-08 08:26:22,139 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-09-08 08:26:22,139 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-09-08 08:26:22,140 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-09-08 08:26:22,141 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-09-08 08:26:22,141 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-09-08 08:26:22,141 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-09-08 08:26:22,141 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-09-08 08:26:22,141 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-09-08 08:26:22,142 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-09-08 08:26:22,142 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-09-08 08:26:22,142 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-09-08 08:26:22,142 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-09-08 08:26:22,142 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-09-08 08:26:22,143 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-09-08 08:26:22,143 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-09-08 08:26:22,143 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-09-08 08:26:22,143 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-09-08 08:26:22,144 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-09-08 08:26:22,144 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-09-08 08:26:22,144 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-09-08 08:26:22,144 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-09-08 08:26:22,144 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-09-08 08:26:22,145 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-09-08 08:26:22,145 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-09-08 08:26:22,145 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-09-08 08:26:22,145 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-09-08 08:26:22,145 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-09-08 08:26:22,146 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-09-08 08:26:22,146 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-09-08 08:26:22,175 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-09-08 08:26:22,188 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-09-08 08:26:22,191 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-09-08 08:26:22,193 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-09-08 08:26:22,193 INFO  L275        PluginConnector]: CDTParser initialized
[2019-09-08 08:26:22,194 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.5.3.ufo.UNBOUNDED.pals.c
[2019-09-08 08:26:22,260 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a13e9ae0/e157cbc12d664cda897f84f76cc0e29b/FLAGc381f3bc3
[2019-09-08 08:26:22,886 INFO  L306              CDTParser]: Found 1 translation units.
[2019-09-08 08:26:22,887 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_opt-floodmax.5.3.ufo.UNBOUNDED.pals.c
[2019-09-08 08:26:22,930 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a13e9ae0/e157cbc12d664cda897f84f76cc0e29b/FLAGc381f3bc3
[2019-09-08 08:26:23,108 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a13e9ae0/e157cbc12d664cda897f84f76cc0e29b
[2019-09-08 08:26:23,124 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-09-08 08:26:23,126 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-09-08 08:26:23,130 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-09-08 08:26:23,130 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-09-08 08:26:23,134 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-09-08 08:26:23,136 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 08:26:23" (1/1) ...
[2019-09-08 08:26:23,140 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af350f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:23, skipping insertion in model container
[2019-09-08 08:26:23,140 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 08:26:23" (1/1) ...
[2019-09-08 08:26:23,150 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-09-08 08:26:23,238 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-09-08 08:26:23,870 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-09-08 08:26:23,882 INFO  L188         MainTranslator]: Completed pre-run
[2019-09-08 08:26:24,004 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-09-08 08:26:24,030 INFO  L192         MainTranslator]: Completed translation
[2019-09-08 08:26:24,031 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24 WrapperNode
[2019-09-08 08:26:24,031 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-09-08 08:26:24,032 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-09-08 08:26:24,032 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-09-08 08:26:24,032 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-09-08 08:26:24,043 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,044 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,065 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,065 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,139 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,184 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,201 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (1/1) ...
[2019-09-08 08:26:24,225 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-09-08 08:26:24,231 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-09-08 08:26:24,231 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-09-08 08:26:24,232 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-09-08 08:26:24,233 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (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
[2019-09-08 08:26:24,304 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-09-08 08:26:24,305 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-09-08 08:26:24,305 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2019-09-08 08:26:24,305 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2019-09-08 08:26:24,306 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2019-09-08 08:26:24,306 INFO  L138     BoogieDeclarations]: Found implementation of procedure node4
[2019-09-08 08:26:24,306 INFO  L138     BoogieDeclarations]: Found implementation of procedure node5
[2019-09-08 08:26:24,306 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2019-09-08 08:26:24,307 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2019-09-08 08:26:24,307 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-09-08 08:26:24,307 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2019-09-08 08:26:24,307 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-09-08 08:26:24,308 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2019-09-08 08:26:24,308 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2019-09-08 08:26:24,309 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2019-09-08 08:26:24,309 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2019-09-08 08:26:24,311 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-09-08 08:26:24,311 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2019-09-08 08:26:24,311 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2019-09-08 08:26:24,312 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2019-09-08 08:26:24,312 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2019-09-08 08:26:24,312 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2019-09-08 08:26:24,312 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2019-09-08 08:26:24,312 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2019-09-08 08:26:24,312 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2019-09-08 08:26:24,313 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2019-09-08 08:26:24,313 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-09-08 08:26:24,313 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-09-08 08:26:24,313 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-09-08 08:26:26,863 INFO  L278             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-09-08 08:26:26,863 INFO  L283             CfgBuilder]: Removed 1 assume(true) statements.
[2019-09-08 08:26:26,865 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 08:26:26 BoogieIcfgContainer
[2019-09-08 08:26:26,865 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-09-08 08:26:26,866 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-09-08 08:26:26,866 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-09-08 08:26:26,869 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-09-08 08:26:26,869 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 08:26:23" (1/3) ...
[2019-09-08 08:26:26,870 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74dad7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 08:26:26, skipping insertion in model container
[2019-09-08 08:26:26,870 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 08:26:24" (2/3) ...
[2019-09-08 08:26:26,871 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74dad7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 08:26:26, skipping insertion in model container
[2019-09-08 08:26:26,871 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 08:26:26" (3/3) ...
[2019-09-08 08:26:26,872 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.UNBOUNDED.pals.c
[2019-09-08 08:26:26,882 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-09-08 08:26:26,891 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-09-08 08:26:26,907 INFO  L252      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-09-08 08:26:26,944 INFO  L128   ementStrategyFactory]: Using default assertion order modulation
[2019-09-08 08:26:26,945 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2019-09-08 08:26:26,945 INFO  L378      AbstractCegarLoop]: Hoare is true
[2019-09-08 08:26:26,945 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-09-08 08:26:26,945 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-09-08 08:26:26,945 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-09-08 08:26:26,946 INFO  L382      AbstractCegarLoop]: Difference is false
[2019-09-08 08:26:26,946 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-09-08 08:26:26,946 INFO  L388      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-09-08 08:26:26,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 776 states.
[2019-09-08 08:26:27,019 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 182
[2019-09-08 08:26:27,019 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:26:27,020 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:26:27,023 INFO  L418      AbstractCegarLoop]: === Iteration 1 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:26:27,029 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:26:27,030 INFO  L82        PathProgramCache]: Analyzing trace with hash -1090629948, now seen corresponding path program 1 times
[2019-09-08 08:26:27,032 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:26:27,032 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:26:27,097 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:27,097 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:26:27,097 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:27,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:26:27,689 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:26:27,691 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:26:27,691 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-09-08 08:26:27,696 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-09-08 08:26:27,710 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-09-08 08:26:27,711 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-09-08 08:26:27,713 INFO  L87              Difference]: Start difference. First operand 776 states. Second operand 5 states.
[2019-09-08 08:26:28,045 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:26:28,045 INFO  L93              Difference]: Finished difference Result 994 states and 1763 transitions.
[2019-09-08 08:26:28,046 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-09-08 08:26:28,047 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 181
[2019-09-08 08:26:28,050 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:26:28,084 INFO  L225             Difference]: With dead ends: 994
[2019-09-08 08:26:28,084 INFO  L226             Difference]: Without dead ends: 771
[2019-09-08 08:26:28,092 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-09-08 08:26:28,114 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 771 states.
[2019-09-08 08:26:28,218 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771.
[2019-09-08 08:26:28,219 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 771 states.
[2019-09-08 08:26:28,224 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1330 transitions.
[2019-09-08 08:26:28,226 INFO  L78                 Accepts]: Start accepts. Automaton has 771 states and 1330 transitions. Word has length 181
[2019-09-08 08:26:28,227 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:26:28,227 INFO  L475      AbstractCegarLoop]: Abstraction has 771 states and 1330 transitions.
[2019-09-08 08:26:28,227 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-09-08 08:26:28,228 INFO  L276                IsEmpty]: Start isEmpty. Operand 771 states and 1330 transitions.
[2019-09-08 08:26:28,232 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 246
[2019-09-08 08:26:28,232 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:26:28,232 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:26:28,233 INFO  L418      AbstractCegarLoop]: === Iteration 2 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:26:28,233 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:26:28,233 INFO  L82        PathProgramCache]: Analyzing trace with hash 1965304482, now seen corresponding path program 1 times
[2019-09-08 08:26:28,233 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:26:28,234 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:26:28,235 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:28,236 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:26:28,236 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:28,558 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:26:29,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:26:29,057 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:26:29,057 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2019-09-08 08:26:29,061 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-09-08 08:26:29,061 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-09-08 08:26:29,062 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156
[2019-09-08 08:26:29,062 INFO  L87              Difference]: Start difference. First operand 771 states and 1330 transitions. Second operand 13 states.
[2019-09-08 08:26:44,637 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:26:44,638 INFO  L93              Difference]: Finished difference Result 3582 states and 6000 transitions.
[2019-09-08 08:26:44,638 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. 
[2019-09-08 08:26:44,638 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 245
[2019-09-08 08:26:44,639 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:26:44,669 INFO  L225             Difference]: With dead ends: 3582
[2019-09-08 08:26:44,670 INFO  L226             Difference]: Without dead ends: 3368
[2019-09-08 08:26:44,680 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=2047, Unknown=0, NotChecked=0, Total=2652
[2019-09-08 08:26:44,686 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3368 states.
[2019-09-08 08:26:44,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1845.
[2019-09-08 08:26:44,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1845 states.
[2019-09-08 08:26:44,815 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 3108 transitions.
[2019-09-08 08:26:44,816 INFO  L78                 Accepts]: Start accepts. Automaton has 1845 states and 3108 transitions. Word has length 245
[2019-09-08 08:26:44,817 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:26:44,817 INFO  L475      AbstractCegarLoop]: Abstraction has 1845 states and 3108 transitions.
[2019-09-08 08:26:44,818 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-09-08 08:26:44,818 INFO  L276                IsEmpty]: Start isEmpty. Operand 1845 states and 3108 transitions.
[2019-09-08 08:26:44,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 247
[2019-09-08 08:26:44,824 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:26:44,824 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:26:44,824 INFO  L418      AbstractCegarLoop]: === Iteration 3 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:26:44,825 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:26:44,825 INFO  L82        PathProgramCache]: Analyzing trace with hash -274859823, now seen corresponding path program 1 times
[2019-09-08 08:26:44,825 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:26:44,825 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:26:44,827 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:44,827 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:26:44,828 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:44,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:26:45,158 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:26:45,159 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:26:45,159 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-09-08 08:26:45,160 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-09-08 08:26:45,160 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-09-08 08:26:45,160 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-09-08 08:26:45,160 INFO  L87              Difference]: Start difference. First operand 1845 states and 3108 transitions. Second operand 6 states.
[2019-09-08 08:26:49,856 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:26:49,857 INFO  L93              Difference]: Finished difference Result 4443 states and 7401 transitions.
[2019-09-08 08:26:49,857 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2019-09-08 08:26:49,857 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 246
[2019-09-08 08:26:49,859 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:26:49,886 INFO  L225             Difference]: With dead ends: 4443
[2019-09-08 08:26:49,886 INFO  L226             Difference]: Without dead ends: 3155
[2019-09-08 08:26:49,890 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110
[2019-09-08 08:26:49,895 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3155 states.
[2019-09-08 08:26:49,984 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2934.
[2019-09-08 08:26:49,984 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2934 states.
[2019-09-08 08:26:49,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4901 transitions.
[2019-09-08 08:26:49,997 INFO  L78                 Accepts]: Start accepts. Automaton has 2934 states and 4901 transitions. Word has length 246
[2019-09-08 08:26:49,998 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:26:49,998 INFO  L475      AbstractCegarLoop]: Abstraction has 2934 states and 4901 transitions.
[2019-09-08 08:26:49,998 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-09-08 08:26:49,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 2934 states and 4901 transitions.
[2019-09-08 08:26:50,005 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 248
[2019-09-08 08:26:50,005 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:26:50,005 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:26:50,006 INFO  L418      AbstractCegarLoop]: === Iteration 4 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:26:50,006 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:26:50,006 INFO  L82        PathProgramCache]: Analyzing trace with hash -1052161479, now seen corresponding path program 1 times
[2019-09-08 08:26:50,007 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:26:50,007 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:26:50,008 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:50,008 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:26:50,008 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:50,061 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:26:50,265 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:26:50,266 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:26:50,266 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-09-08 08:26:50,266 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-09-08 08:26:50,267 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-09-08 08:26:50,267 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-09-08 08:26:50,267 INFO  L87              Difference]: Start difference. First operand 2934 states and 4901 transitions. Second operand 6 states.
[2019-09-08 08:26:53,860 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:26:53,861 INFO  L93              Difference]: Finished difference Result 7072 states and 11709 transitions.
[2019-09-08 08:26:53,862 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-09-08 08:26:53,862 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 247
[2019-09-08 08:26:53,863 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:26:53,900 INFO  L225             Difference]: With dead ends: 7072
[2019-09-08 08:26:53,900 INFO  L226             Difference]: Without dead ends: 4695
[2019-09-08 08:26:53,908 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90
[2019-09-08 08:26:53,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4695 states.
[2019-09-08 08:26:54,156 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4672.
[2019-09-08 08:26:54,156 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4672 states.
[2019-09-08 08:26:54,180 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 7747 transitions.
[2019-09-08 08:26:54,180 INFO  L78                 Accepts]: Start accepts. Automaton has 4672 states and 7747 transitions. Word has length 247
[2019-09-08 08:26:54,181 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:26:54,181 INFO  L475      AbstractCegarLoop]: Abstraction has 4672 states and 7747 transitions.
[2019-09-08 08:26:54,181 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-09-08 08:26:54,181 INFO  L276                IsEmpty]: Start isEmpty. Operand 4672 states and 7747 transitions.
[2019-09-08 08:26:54,190 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 249
[2019-09-08 08:26:54,190 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:26:54,190 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:26:54,191 INFO  L418      AbstractCegarLoop]: === Iteration 5 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:26:54,191 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:26:54,191 INFO  L82        PathProgramCache]: Analyzing trace with hash 569606024, now seen corresponding path program 1 times
[2019-09-08 08:26:54,191 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:26:54,191 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:26:54,193 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:54,193 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:26:54,193 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:26:54,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:26:54,507 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:26:54,507 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:26:54,507 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-09-08 08:26:54,508 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-09-08 08:26:54,508 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-09-08 08:26:54,509 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2019-09-08 08:26:54,509 INFO  L87              Difference]: Start difference. First operand 4672 states and 7747 transitions. Second operand 6 states.
[2019-09-08 08:26:59,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:26:59,582 INFO  L93              Difference]: Finished difference Result 25016 states and 41230 transitions.
[2019-09-08 08:26:59,583 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2019-09-08 08:26:59,583 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 248
[2019-09-08 08:26:59,584 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:26:59,703 INFO  L225             Difference]: With dead ends: 25016
[2019-09-08 08:26:59,703 INFO  L226             Difference]: Without dead ends: 20901
[2019-09-08 08:26:59,721 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2019-09-08 08:26:59,748 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20901 states.
[2019-09-08 08:27:00,395 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20901 to 20855.
[2019-09-08 08:27:00,395 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 20855 states.
[2019-09-08 08:27:00,450 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20855 states to 20855 states and 34282 transitions.
[2019-09-08 08:27:00,452 INFO  L78                 Accepts]: Start accepts. Automaton has 20855 states and 34282 transitions. Word has length 248
[2019-09-08 08:27:00,453 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:27:00,453 INFO  L475      AbstractCegarLoop]: Abstraction has 20855 states and 34282 transitions.
[2019-09-08 08:27:00,453 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-09-08 08:27:00,453 INFO  L276                IsEmpty]: Start isEmpty. Operand 20855 states and 34282 transitions.
[2019-09-08 08:27:00,463 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 250
[2019-09-08 08:27:00,463 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:27:00,463 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:27:00,464 INFO  L418      AbstractCegarLoop]: === Iteration 6 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:27:00,464 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:27:00,464 INFO  L82        PathProgramCache]: Analyzing trace with hash -746893872, now seen corresponding path program 1 times
[2019-09-08 08:27:00,464 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:27:00,464 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:27:00,466 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:27:00,466 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:27:00,466 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:27:00,682 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:27:00,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:27:00,895 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:27:00,896 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-09-08 08:27:00,896 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-09-08 08:27:00,896 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-09-08 08:27:00,897 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2019-09-08 08:27:00,897 INFO  L87              Difference]: Start difference. First operand 20855 states and 34282 transitions. Second operand 6 states.
[2019-09-08 08:27:07,283 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:27:07,284 INFO  L93              Difference]: Finished difference Result 121880 states and 200186 transitions.
[2019-09-08 08:27:07,284 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2019-09-08 08:27:07,284 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 249
[2019-09-08 08:27:07,285 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:27:07,659 INFO  L225             Difference]: With dead ends: 121880
[2019-09-08 08:27:07,659 INFO  L226             Difference]: Without dead ends: 101582
[2019-09-08 08:27:07,728 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2019-09-08 08:27:07,835 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101582 states.
[2019-09-08 08:27:11,874 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101582 to 101384.
[2019-09-08 08:27:11,875 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 101384 states.
[2019-09-08 08:27:12,044 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101384 states to 101384 states and 166203 transitions.
[2019-09-08 08:27:12,047 INFO  L78                 Accepts]: Start accepts. Automaton has 101384 states and 166203 transitions. Word has length 249
[2019-09-08 08:27:12,047 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:27:12,047 INFO  L475      AbstractCegarLoop]: Abstraction has 101384 states and 166203 transitions.
[2019-09-08 08:27:12,048 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-09-08 08:27:12,048 INFO  L276                IsEmpty]: Start isEmpty. Operand 101384 states and 166203 transitions.
[2019-09-08 08:27:12,060 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 251
[2019-09-08 08:27:12,061 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:27:12,061 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:27:12,062 INFO  L418      AbstractCegarLoop]: === Iteration 7 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:27:12,062 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:27:12,062 INFO  L82        PathProgramCache]: Analyzing trace with hash 1339597375, now seen corresponding path program 1 times
[2019-09-08 08:27:12,062 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:27:12,062 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:27:12,063 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:27:12,064 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:27:12,064 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:27:12,150 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:27:12,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:27:12,312 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:27:12,312 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-09-08 08:27:12,313 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-09-08 08:27:12,313 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-09-08 08:27:12,314 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2019-09-08 08:27:12,314 INFO  L87              Difference]: Start difference. First operand 101384 states and 166203 transitions. Second operand 6 states.
[2019-09-08 08:27:24,000 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:27:24,001 INFO  L93              Difference]: Finished difference Result 548648 states and 899075 transitions.
[2019-09-08 08:27:24,001 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2019-09-08 08:27:24,001 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 250
[2019-09-08 08:27:24,002 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:27:25,404 INFO  L225             Difference]: With dead ends: 548648
[2019-09-08 08:27:25,405 INFO  L226             Difference]: Without dead ends: 447821
[2019-09-08 08:27:25,652 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2019-09-08 08:27:26,047 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 447821 states.
[2019-09-08 08:27:44,724 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 447821 to 446872.
[2019-09-08 08:27:44,725 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 446872 states.
[2019-09-08 08:27:45,721 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 446872 states to 446872 states and 731274 transitions.
[2019-09-08 08:27:45,732 INFO  L78                 Accepts]: Start accepts. Automaton has 446872 states and 731274 transitions. Word has length 250
[2019-09-08 08:27:45,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:27:45,732 INFO  L475      AbstractCegarLoop]: Abstraction has 446872 states and 731274 transitions.
[2019-09-08 08:27:45,733 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-09-08 08:27:45,733 INFO  L276                IsEmpty]: Start isEmpty. Operand 446872 states and 731274 transitions.
[2019-09-08 08:27:45,745 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 253
[2019-09-08 08:27:45,745 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:27:45,745 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:27:45,746 INFO  L418      AbstractCegarLoop]: === Iteration 8 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:27:45,746 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:27:45,746 INFO  L82        PathProgramCache]: Analyzing trace with hash 2033618999, now seen corresponding path program 1 times
[2019-09-08 08:27:45,746 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:27:45,746 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:27:45,747 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:27:45,748 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:27:45,748 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:27:45,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:27:45,912 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:27:45,912 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:27:45,912 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-09-08 08:27:45,913 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-09-08 08:27:45,913 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-09-08 08:27:45,914 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-09-08 08:27:45,914 INFO  L87              Difference]: Start difference. First operand 446872 states and 731274 transitions. Second operand 4 states.
[2019-09-08 08:28:18,803 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:28:18,804 INFO  L93              Difference]: Finished difference Result 1647698 states and 2709829 transitions.
[2019-09-08 08:28:18,804 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-09-08 08:28:18,804 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 252
[2019-09-08 08:28:18,805 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:28:32,716 INFO  L225             Difference]: With dead ends: 1647698
[2019-09-08 08:28:32,716 INFO  L226             Difference]: Without dead ends: 1201383
[2019-09-08 08:28:33,340 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-09-08 08:28:34,239 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1201383 states.
[2019-09-08 08:29:41,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201383 to 1195156.
[2019-09-08 08:29:41,889 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1195156 states.
[2019-09-08 08:29:46,302 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1195156 states to 1195156 states and 1953204 transitions.
[2019-09-08 08:29:46,337 INFO  L78                 Accepts]: Start accepts. Automaton has 1195156 states and 1953204 transitions. Word has length 252
[2019-09-08 08:29:46,338 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-09-08 08:29:46,338 INFO  L475      AbstractCegarLoop]: Abstraction has 1195156 states and 1953204 transitions.
[2019-09-08 08:29:46,338 INFO  L476      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-09-08 08:29:46,338 INFO  L276                IsEmpty]: Start isEmpty. Operand 1195156 states and 1953204 transitions.
[2019-09-08 08:29:46,352 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 254
[2019-09-08 08:29:46,352 INFO  L391         BasicCegarLoop]: Found error trace
[2019-09-08 08:29:46,352 INFO  L399         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-08 08:29:46,353 INFO  L418      AbstractCegarLoop]: === Iteration 9 === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-08 08:29:46,353 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-09-08 08:29:46,353 INFO  L82        PathProgramCache]: Analyzing trace with hash -1175704485, now seen corresponding path program 1 times
[2019-09-08 08:29:46,353 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-08 08:29:46,353 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-08 08:29:46,355 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:29:46,355 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-08 08:29:46,355 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-08 08:29:46,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-08 08:29:46,756 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-08 08:29:46,757 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-08 08:29:46,757 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13
[2019-09-08 08:29:46,757 INFO  L454      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-09-08 08:29:46,758 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-09-08 08:29:46,758 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156
[2019-09-08 08:29:46,758 INFO  L87              Difference]: Start difference. First operand 1195156 states and 1953204 transitions. Second operand 13 states.
[2019-09-08 08:30:52,553 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-08 08:30:52,553 INFO  L93              Difference]: Finished difference Result 2034307 states and 3330943 transitions.
[2019-09-08 08:30:52,553 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. 
[2019-09-08 08:30:52,553 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 253
[2019-09-08 08:30:52,554 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-08 08:30:58,963 INFO  L225             Difference]: With dead ends: 2034307
[2019-09-08 08:30:58,963 INFO  L226             Difference]: Without dead ends: 1819403
[2019-09-08 08:30:59,467 INFO  L628         BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=985, Invalid=3985, Unknown=0, NotChecked=0, Total=4970
[2019-09-08 08:31:01,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1819403 states.