/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 21:07:53,934 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-23 21:07:53,937 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-11-23 21:07:54,031 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
[2019-11-23 21:07:54,049 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 21:07:54,049 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 21:07:54,052 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-23 21:07:54,052 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-23 21:07:54,052 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-23 21:07:54,052 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 21:07:54,053 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 21:07:54,053 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 21:07:54,053 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 21:07:54,053 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 21:07:54,054 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 21:07:54,055 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 21:07:54,055 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 21:07:54,055 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-23 21:07:54,056 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 21:07:54,056 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 21:07:54,056 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-23 21:07:54,056 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 21:07:54,056 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 21:07:54,056 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-23 21:07:54,057 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 21:07:54,057 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 21:07:54,057 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 21:07:54,057 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 21:07:54,057 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 21:07:54,058 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 21:07:54,058 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-23 21:07:54,058 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 21:07:54,058 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 21:07:54,058 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 21:07:54,341 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 21:07:54,353 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 21:07:54,357 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 21:07:54,359 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 21:07:54,359 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 21:07:54,360 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c
[2019-11-23 21:07:54,436 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b53002b79/5ffb1854b30b4ecda972d6d6f7c4eea0/FLAG2ead75130
[2019-11-23 21:07:55,179 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 21:07:55,180 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label23.c
[2019-11-23 21:07:55,206 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b53002b79/5ffb1854b30b4ecda972d6d6f7c4eea0/FLAG2ead75130
[2019-11-23 21:07:55,262 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b53002b79/5ffb1854b30b4ecda972d6d6f7c4eea0
[2019-11-23 21:07:55,273 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 21:07:55,275 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 21:07:55,276 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 21:07:55,277 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 21:07:55,281 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 21:07:55,282 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:55" (1/1) ...
[2019-11-23 21:07:55,285 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332eec45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:55, skipping insertion in model container
[2019-11-23 21:07:55,286 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:55" (1/1) ...
[2019-11-23 21:07:55,294 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 21:07:55,444 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 21:07:56,954 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:07:56,962 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 21:07:57,553 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:07:57,589 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 21:07:57,590 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57 WrapperNode
[2019-11-23 21:07:57,590 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 21:07:57,591 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 21:07:57,592 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 21:07:57,592 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 21:07:57,605 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:57,680 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:57,946 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 21:07:57,946 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 21:07:57,947 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 21:07:57,947 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 21:07:57,957 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:57,958 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:58,007 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:58,007 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:58,151 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:58,201 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:58,254 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (1/1) ...
[2019-11-23 21:07:59,105 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 21:07:59,106 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 21:07:59,106 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 21:07:59,106 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 21:07:59,107 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (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
[2019-11-23 21:07:59,168 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 21:07:59,168 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 21:08:04,105 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 21:08:04,106 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 21:08:04,108 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:04 BoogieIcfgContainer
[2019-11-23 21:08:04,109 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 21:08:04,111 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 21:08:04,112 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 21:08:04,117 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 21:08:04,119 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:07:55" (1/3) ...
[2019-11-23 21:08:04,121 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b27486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:04, skipping insertion in model container
[2019-11-23 21:08:04,121 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:57" (2/3) ...
[2019-11-23 21:08:04,122 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b27486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:04, skipping insertion in model container
[2019-11-23 21:08:04,123 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:04" (3/3) ...
[2019-11-23 21:08:04,125 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem12_label23.c
[2019-11-23 21:08:04,136 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 21:08:04,146 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 21:08:04,159 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 21:08:04,210 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 21:08:04,211 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 21:08:04,211 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 21:08:04,211 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 21:08:04,211 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 21:08:04,212 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 21:08:04,213 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 21:08:04,213 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 21:08:04,269 INFO  L276                IsEmpty]: Start isEmpty. Operand 818 states.
[2019-11-23 21:08:04,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2019-11-23 21:08:04,276 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:04,277 INFO  L410         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]
[2019-11-23 21:08:04,278 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:04,283 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:04,284 INFO  L82        PathProgramCache]: Analyzing trace with hash -596708735, now seen corresponding path program 1 times
[2019-11-23 21:08:04,291 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:04,291 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938242973]
[2019-11-23 21:08:04,291 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:04,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:04,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:08:04,625 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938242973]
[2019-11-23 21:08:04,627 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:04,627 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:08:04,629 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023311378]
[2019-11-23 21:08:04,633 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:04,634 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:04,648 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:04,649 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:04,651 INFO  L87              Difference]: Start difference. First operand 818 states. Second operand 4 states.
[2019-11-23 21:08:13,199 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:13,200 INFO  L93              Difference]: Finished difference Result 3142 states and 6130 transitions.
[2019-11-23 21:08:13,201 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:13,202 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 35
[2019-11-23 21:08:13,203 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:13,240 INFO  L225             Difference]: With dead ends: 3142
[2019-11-23 21:08:13,240 INFO  L226             Difference]: Without dead ends: 2257
[2019-11-23 21:08:13,247 INFO  L630         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
[2019-11-23 21:08:13,269 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2257 states.
[2019-11-23 21:08:13,386 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257.
[2019-11-23 21:08:13,387 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2257 states.
[2019-11-23 21:08:13,402 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3685 transitions.
[2019-11-23 21:08:13,404 INFO  L78                 Accepts]: Start accepts. Automaton has 2257 states and 3685 transitions. Word has length 35
[2019-11-23 21:08:13,405 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:13,405 INFO  L462      AbstractCegarLoop]: Abstraction has 2257 states and 3685 transitions.
[2019-11-23 21:08:13,405 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:08:13,405 INFO  L276                IsEmpty]: Start isEmpty. Operand 2257 states and 3685 transitions.
[2019-11-23 21:08:13,412 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2019-11-23 21:08:13,413 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:13,413 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:13,414 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:13,414 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:13,415 INFO  L82        PathProgramCache]: Analyzing trace with hash -1113859181, now seen corresponding path program 1 times
[2019-11-23 21:08:13,415 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:13,415 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017814582]
[2019-11-23 21:08:13,416 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:13,510 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:13,666 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:08:13,666 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017814582]
[2019-11-23 21:08:13,667 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:13,667 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:08:13,667 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634673786]
[2019-11-23 21:08:13,669 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:13,669 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:13,669 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:13,670 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:13,670 INFO  L87              Difference]: Start difference. First operand 2257 states and 3685 transitions. Second operand 4 states.
[2019-11-23 21:08:21,239 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:21,239 INFO  L93              Difference]: Finished difference Result 9018 states and 14732 transitions.
[2019-11-23 21:08:21,239 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:21,239 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 106
[2019-11-23 21:08:21,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:21,272 INFO  L225             Difference]: With dead ends: 9018
[2019-11-23 21:08:21,272 INFO  L226             Difference]: Without dead ends: 6763
[2019-11-23 21:08:21,277 INFO  L630         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
[2019-11-23 21:08:21,284 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6763 states.
[2019-11-23 21:08:21,441 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763.
[2019-11-23 21:08:21,441 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6763 states.
[2019-11-23 21:08:21,457 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9613 transitions.
[2019-11-23 21:08:21,457 INFO  L78                 Accepts]: Start accepts. Automaton has 6763 states and 9613 transitions. Word has length 106
[2019-11-23 21:08:21,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:21,462 INFO  L462      AbstractCegarLoop]: Abstraction has 6763 states and 9613 transitions.
[2019-11-23 21:08:21,462 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:08:21,462 INFO  L276                IsEmpty]: Start isEmpty. Operand 6763 states and 9613 transitions.
[2019-11-23 21:08:21,474 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 113
[2019-11-23 21:08:21,474 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:21,475 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:21,475 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:21,475 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:21,476 INFO  L82        PathProgramCache]: Analyzing trace with hash 127960514, now seen corresponding path program 1 times
[2019-11-23 21:08:21,476 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:21,477 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832703064]
[2019-11-23 21:08:21,477 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:21,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:21,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:08:21,916 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832703064]
[2019-11-23 21:08:21,917 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:21,917 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-23 21:08:21,918 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201481911]
[2019-11-23 21:08:21,919 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-23 21:08:21,920 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:21,921 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-23 21:08:21,922 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:08:21,922 INFO  L87              Difference]: Start difference. First operand 6763 states and 9613 transitions. Second operand 6 states.
[2019-11-23 21:08:31,621 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:31,621 INFO  L93              Difference]: Finished difference Result 21034 states and 29741 transitions.
[2019-11-23 21:08:31,622 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:31,622 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 112
[2019-11-23 21:08:31,623 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:31,685 INFO  L225             Difference]: With dead ends: 21034
[2019-11-23 21:08:31,685 INFO  L226             Difference]: Without dead ends: 14273
[2019-11-23 21:08:31,694 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:08:31,708 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14273 states.
[2019-11-23 21:08:31,929 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273.
[2019-11-23 21:08:31,929 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14273 states.
[2019-11-23 21:08:32,089 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 19733 transitions.
[2019-11-23 21:08:32,093 INFO  L78                 Accepts]: Start accepts. Automaton has 14273 states and 19733 transitions. Word has length 112
[2019-11-23 21:08:32,095 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:32,095 INFO  L462      AbstractCegarLoop]: Abstraction has 14273 states and 19733 transitions.
[2019-11-23 21:08:32,096 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-23 21:08:32,104 INFO  L276                IsEmpty]: Start isEmpty. Operand 14273 states and 19733 transitions.
[2019-11-23 21:08:32,118 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2019-11-23 21:08:32,119 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:32,119 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 21:08:32,120 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:32,120 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:32,120 INFO  L82        PathProgramCache]: Analyzing trace with hash 1901420208, now seen corresponding path program 1 times
[2019-11-23 21:08:32,120 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:32,121 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009828521]
[2019-11-23 21:08:32,121 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:32,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:32,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 342 backedges. 235 proven. 4 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked.
[2019-11-23 21:08:32,601 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009828521]
[2019-11-23 21:08:32,601 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56417880]
[2019-11-23 21:08:32,601 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:08:32,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:32,737 INFO  L255         TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-11-23 21:08:32,768 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:08:33,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 342 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked.
[2019-11-23 21:08:33,075 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:08:33,075 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-23 21:08:33,076 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371251162]
[2019-11-23 21:08:33,077 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:08:33,077 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:33,077 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:08:33,077 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:08:33,078 INFO  L87              Difference]: Start difference. First operand 14273 states and 19733 transitions. Second operand 3 states.
[2019-11-23 21:08:35,952 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:35,952 INFO  L93              Difference]: Finished difference Result 27830 states and 38744 transitions.
[2019-11-23 21:08:35,952 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:08:35,953 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 320
[2019-11-23 21:08:35,953 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:35,999 INFO  L225             Difference]: With dead ends: 27830
[2019-11-23 21:08:36,000 INFO  L226             Difference]: Without dead ends: 14273
[2019-11-23 21:08:36,014 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:08:36,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14273 states.
[2019-11-23 21:08:36,228 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273.
[2019-11-23 21:08:36,228 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14273 states.
[2019-11-23 21:08:36,250 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 18747 transitions.
[2019-11-23 21:08:36,250 INFO  L78                 Accepts]: Start accepts. Automaton has 14273 states and 18747 transitions. Word has length 320
[2019-11-23 21:08:36,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:36,252 INFO  L462      AbstractCegarLoop]: Abstraction has 14273 states and 18747 transitions.
[2019-11-23 21:08:36,252 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:08:36,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 14273 states and 18747 transitions.
[2019-11-23 21:08:36,277 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 463
[2019-11-23 21:08:36,278 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:36,279 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:36,482 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:08:36,482 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:36,482 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:36,483 INFO  L82        PathProgramCache]: Analyzing trace with hash -2118411562, now seen corresponding path program 1 times
[2019-11-23 21:08:36,483 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:36,484 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146901325]
[2019-11-23 21:08:36,484 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:36,546 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:36,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 662 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked.
[2019-11-23 21:08:36,946 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146901325]
[2019-11-23 21:08:36,947 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:36,947 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:08:36,948 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423136566]
[2019-11-23 21:08:36,949 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:36,949 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:36,950 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:36,950 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:36,950 INFO  L87              Difference]: Start difference. First operand 14273 states and 18747 transitions. Second operand 4 states.
[2019-11-23 21:08:42,721 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:42,721 INFO  L93              Difference]: Finished difference Result 34552 states and 45643 transitions.
[2019-11-23 21:08:42,722 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:42,722 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 462
[2019-11-23 21:08:42,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:42,766 INFO  L225             Difference]: With dead ends: 34552
[2019-11-23 21:08:42,767 INFO  L226             Difference]: Without dead ends: 21032
[2019-11-23 21:08:42,784 INFO  L630         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
[2019-11-23 21:08:42,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21032 states.
[2019-11-23 21:08:43,146 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 21032.
[2019-11-23 21:08:43,147 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21032 states.
[2019-11-23 21:08:43,177 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 26927 transitions.
[2019-11-23 21:08:43,177 INFO  L78                 Accepts]: Start accepts. Automaton has 21032 states and 26927 transitions. Word has length 462
[2019-11-23 21:08:43,178 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:43,179 INFO  L462      AbstractCegarLoop]: Abstraction has 21032 states and 26927 transitions.
[2019-11-23 21:08:43,179 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:08:43,179 INFO  L276                IsEmpty]: Start isEmpty. Operand 21032 states and 26927 transitions.
[2019-11-23 21:08:43,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 480
[2019-11-23 21:08:43,213 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:43,214 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:43,214 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:43,215 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:43,215 INFO  L82        PathProgramCache]: Analyzing trace with hash -1213558104, now seen corresponding path program 1 times
[2019-11-23 21:08:43,215 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:43,216 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457823192]
[2019-11-23 21:08:43,216 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:43,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:43,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 701 backedges. 584 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked.
[2019-11-23 21:08:43,700 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457823192]
[2019-11-23 21:08:43,700 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:43,700 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:08:43,701 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332975555]
[2019-11-23 21:08:43,701 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:08:43,701 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:43,702 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:08:43,702 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:08:43,702 INFO  L87              Difference]: Start difference. First operand 21032 states and 26927 transitions. Second operand 3 states.
[2019-11-23 21:08:49,426 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:49,427 INFO  L93              Difference]: Finished difference Result 60837 states and 78400 transitions.
[2019-11-23 21:08:49,427 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:08:49,427 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 479
[2019-11-23 21:08:49,428 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:49,498 INFO  L225             Difference]: With dead ends: 60837
[2019-11-23 21:08:49,498 INFO  L226             Difference]: Without dead ends: 40558
[2019-11-23 21:08:49,526 INFO  L630         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
[2019-11-23 21:08:49,568 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40558 states.
[2019-11-23 21:08:49,954 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40558 to 39807.
[2019-11-23 21:08:49,955 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39807 states.
[2019-11-23 21:08:50,003 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 50805 transitions.
[2019-11-23 21:08:50,003 INFO  L78                 Accepts]: Start accepts. Automaton has 39807 states and 50805 transitions. Word has length 479
[2019-11-23 21:08:50,005 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:50,006 INFO  L462      AbstractCegarLoop]: Abstraction has 39807 states and 50805 transitions.
[2019-11-23 21:08:50,006 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:08:50,006 INFO  L276                IsEmpty]: Start isEmpty. Operand 39807 states and 50805 transitions.
[2019-11-23 21:08:50,039 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 537
[2019-11-23 21:08:50,039 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:50,040 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:50,040 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:50,041 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:50,041 INFO  L82        PathProgramCache]: Analyzing trace with hash -1708867845, now seen corresponding path program 1 times
[2019-11-23 21:08:50,041 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:50,041 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738281433]
[2019-11-23 21:08:50,042 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:50,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:51,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 395 backedges. 102 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked.
[2019-11-23 21:08:51,265 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738281433]
[2019-11-23 21:08:51,265 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69368605]
[2019-11-23 21:08:51,265 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:08:51,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:51,422 INFO  L255         TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:08:51,429 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:08:51,879 INFO  L134       CoverageAnalysis]: Checked inductivity of 395 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked.
[2019-11-23 21:08:51,879 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:08:51,880 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7
[2019-11-23 21:08:51,880 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708956107]
[2019-11-23 21:08:51,881 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:08:51,881 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:51,881 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:08:51,883 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:08:51,883 INFO  L87              Difference]: Start difference. First operand 39807 states and 50805 transitions. Second operand 3 states.
[2019-11-23 21:08:56,871 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:56,872 INFO  L93              Difference]: Finished difference Result 78861 states and 100852 transitions.
[2019-11-23 21:08:56,872 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:08:56,873 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 536
[2019-11-23 21:08:56,873 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:56,939 INFO  L225             Difference]: With dead ends: 78861
[2019-11-23 21:08:56,939 INFO  L226             Difference]: Without dead ends: 39807
[2019-11-23 21:08:56,968 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 536 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:08:57,006 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39807 states.
[2019-11-23 21:08:57,543 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 39807.
[2019-11-23 21:08:57,543 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39807 states.
[2019-11-23 21:08:57,592 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 47530 transitions.
[2019-11-23 21:08:57,593 INFO  L78                 Accepts]: Start accepts. Automaton has 39807 states and 47530 transitions. Word has length 536
[2019-11-23 21:08:57,593 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:57,594 INFO  L462      AbstractCegarLoop]: Abstraction has 39807 states and 47530 transitions.
[2019-11-23 21:08:57,594 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:08:57,594 INFO  L276                IsEmpty]: Start isEmpty. Operand 39807 states and 47530 transitions.
[2019-11-23 21:08:57,627 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 608
[2019-11-23 21:08:57,627 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:57,628 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:57,840 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:08:57,840 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:57,841 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:57,841 INFO  L82        PathProgramCache]: Analyzing trace with hash -1138327107, now seen corresponding path program 1 times
[2019-11-23 21:08:57,841 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:57,842 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834838073]
[2019-11-23 21:08:57,842 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:57,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:58,314 INFO  L134       CoverageAnalysis]: Checked inductivity of 638 backedges. 423 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked.
[2019-11-23 21:08:58,315 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834838073]
[2019-11-23 21:08:58,315 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027169092]
[2019-11-23 21:08:58,316 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:08:58,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:58,495 INFO  L255         TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:08:58,515 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:08:58,937 INFO  L134       CoverageAnalysis]: Checked inductivity of 638 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked.
[2019-11-23 21:08:58,942 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:08:58,943 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4
[2019-11-23 21:08:58,943 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022532751]
[2019-11-23 21:08:58,944 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:08:58,944 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:58,945 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:08:58,945 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:58,945 INFO  L87              Difference]: Start difference. First operand 39807 states and 47530 transitions. Second operand 3 states.
[2019-11-23 21:09:03,568 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:03,569 INFO  L93              Difference]: Finished difference Result 105146 states and 125807 transitions.
[2019-11-23 21:09:03,569 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:03,569 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 607
[2019-11-23 21:09:03,570 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:03,638 INFO  L225             Difference]: With dead ends: 105146
[2019-11-23 21:09:03,638 INFO  L226             Difference]: Without dead ends: 66092
[2019-11-23 21:09:03,666 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 607 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:03,723 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66092 states.
[2019-11-23 21:09:04,146 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66092 to 51823.
[2019-11-23 21:09:04,146 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51823 states.
[2019-11-23 21:09:04,217 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51823 states to 51823 states and 60365 transitions.
[2019-11-23 21:09:04,217 INFO  L78                 Accepts]: Start accepts. Automaton has 51823 states and 60365 transitions. Word has length 607
[2019-11-23 21:09:04,218 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:04,218 INFO  L462      AbstractCegarLoop]: Abstraction has 51823 states and 60365 transitions.
[2019-11-23 21:09:04,218 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:04,219 INFO  L276                IsEmpty]: Start isEmpty. Operand 51823 states and 60365 transitions.
[2019-11-23 21:09:04,247 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 611
[2019-11-23 21:09:04,247 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:04,249 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:09:04,697 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:04,697 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:04,697 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:04,698 INFO  L82        PathProgramCache]: Analyzing trace with hash 994668319, now seen corresponding path program 1 times
[2019-11-23 21:09:04,698 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:04,698 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32556337]
[2019-11-23 21:09:04,698 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:04,766 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:05,042 INFO  L134       CoverageAnalysis]: Checked inductivity of 649 backedges. 538 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked.
[2019-11-23 21:09:05,043 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32556337]
[2019-11-23 21:09:05,043 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:05,043 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:05,043 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761862906]
[2019-11-23 21:09:05,044 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:05,044 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:05,044 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:05,044 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:05,044 INFO  L87              Difference]: Start difference. First operand 51823 states and 60365 transitions. Second operand 4 states.
[2019-11-23 21:09:11,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:11,727 INFO  L93              Difference]: Finished difference Result 106648 states and 123774 transitions.
[2019-11-23 21:09:11,727 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:11,727 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 610
[2019-11-23 21:09:11,728 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:11,777 INFO  L225             Difference]: With dead ends: 106648
[2019-11-23 21:09:11,777 INFO  L226             Difference]: Without dead ends: 55578
[2019-11-23 21:09:11,801 INFO  L630         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
[2019-11-23 21:09:11,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55578 states.
[2019-11-23 21:09:12,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55578 to 52574.
[2019-11-23 21:09:12,415 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52574 states.
[2019-11-23 21:09:12,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52574 states to 52574 states and 60256 transitions.
[2019-11-23 21:09:12,462 INFO  L78                 Accepts]: Start accepts. Automaton has 52574 states and 60256 transitions. Word has length 610
[2019-11-23 21:09:12,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:12,463 INFO  L462      AbstractCegarLoop]: Abstraction has 52574 states and 60256 transitions.
[2019-11-23 21:09:12,463 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:12,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 52574 states and 60256 transitions.
[2019-11-23 21:09:12,481 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 616
[2019-11-23 21:09:12,482 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:12,482 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:09:12,483 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:12,483 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:12,483 INFO  L82        PathProgramCache]: Analyzing trace with hash 774405245, now seen corresponding path program 1 times
[2019-11-23 21:09:12,483 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:12,484 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344169847]
[2019-11-23 21:09:12,484 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:12,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:12,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 650 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked.
[2019-11-23 21:09:12,799 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344169847]
[2019-11-23 21:09:12,799 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:12,799 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:09:12,800 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226586846]
[2019-11-23 21:09:12,800 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:12,801 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:12,801 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:12,801 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:09:12,801 INFO  L87              Difference]: Start difference. First operand 52574 states and 60256 transitions. Second operand 3 states.