/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_label29.c


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This is Ultimate 0.1.24-6598664
[2019-11-23 21:08:33,850 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-23 21:08:33,928 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 21:08:33,941 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 21:08:33,941 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 21:08:33,943 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-23 21:08:33,943 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-23 21:08:33,943 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-23 21:08:33,943 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 21:08:33,943 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 21:08:33,944 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 21:08:33,944 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 21:08:33,944 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 21:08:33,944 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 21:08:33,944 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 21:08:33,945 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 21:08:33,945 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-23 21:08:33,945 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 21:08:33,945 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 21:08:33,945 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-23 21:08:33,946 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 21:08:33,946 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 21:08:33,946 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-23 21:08:33,946 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 21:08:33,946 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 21:08:33,947 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 21:08:33,947 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 21:08:33,947 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 21:08:33,947 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 21:08:33,947 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-23 21:08:33,948 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 21:08:33,948 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 21:08:33,948 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 21:08:34,208 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 21:08:34,224 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 21:08:34,228 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 21:08:34,229 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 21:08:34,230 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 21:08:34,230 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label29.c
[2019-11-23 21:08:34,291 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/877835d4b/6c2135e6894e4498aa07f1cfe2ebb7e1/FLAG041ac933b
[2019-11-23 21:08:35,026 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 21:08:35,027 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label29.c
[2019-11-23 21:08:35,052 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/877835d4b/6c2135e6894e4498aa07f1cfe2ebb7e1/FLAG041ac933b
[2019-11-23 21:08:35,127 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/877835d4b/6c2135e6894e4498aa07f1cfe2ebb7e1
[2019-11-23 21:08:35,138 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 21:08:35,140 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 21:08:35,145 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 21:08:35,146 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 21:08:35,150 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 21:08:35,151 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:35" (1/1) ...
[2019-11-23 21:08:35,154 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18586d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:35, skipping insertion in model container
[2019-11-23 21:08:35,154 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:35" (1/1) ...
[2019-11-23 21:08:35,164 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 21:08:35,310 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 21:08:36,744 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:08:36,752 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 21:08:37,364 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:08:37,392 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 21:08:37,393 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37 WrapperNode
[2019-11-23 21:08:37,393 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 21:08:37,394 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 21:08:37,394 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 21:08:37,394 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 21:08:37,403 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,452 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,729 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 21:08:37,729 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 21:08:37,729 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 21:08:37,729 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 21:08:37,740 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,740 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,775 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,775 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,895 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,933 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:37,971 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (1/1) ...
[2019-11-23 21:08:38,044 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 21:08:38,045 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 21:08:38,045 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 21:08:38,045 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 21:08:38,046 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (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 21:08:38,112 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 21:08:38,115 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 21:08:44,035 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 21:08:44,035 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 21:08:44,037 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:44 BoogieIcfgContainer
[2019-11-23 21:08:44,038 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 21:08:44,040 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 21:08:44,041 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 21:08:44,045 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 21:08:44,046 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:35" (1/3) ...
[2019-11-23 21:08:44,047 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b867e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:44, skipping insertion in model container
[2019-11-23 21:08:44,047 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:37" (2/3) ...
[2019-11-23 21:08:44,048 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b867e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:44, skipping insertion in model container
[2019-11-23 21:08:44,048 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:44" (3/3) ...
[2019-11-23 21:08:44,051 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem12_label29.c
[2019-11-23 21:08:44,061 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 21:08:44,069 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 21:08:44,081 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 21:08:44,124 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 21:08:44,124 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 21:08:44,124 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 21:08:44,124 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 21:08:44,125 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 21:08:44,125 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 21:08:44,125 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 21:08:44,125 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 21:08:44,159 INFO  L276                IsEmpty]: Start isEmpty. Operand 818 states.
[2019-11-23 21:08:44,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2019-11-23 21:08:44,170 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:44,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:08:44,172 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:44,178 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:44,178 INFO  L82        PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times
[2019-11-23 21:08:44,188 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:44,189 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961872059]
[2019-11-23 21:08:44,189 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:44,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:44,498 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 21:08:44,499 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961872059]
[2019-11-23 21:08:44,500 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:44,500 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:08:44,502 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526416733]
[2019-11-23 21:08:44,508 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:44,508 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:44,522 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:44,523 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:44,525 INFO  L87              Difference]: Start difference. First operand 818 states. Second operand 4 states.
[2019-11-23 21:08:52,818 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:52,819 INFO  L93              Difference]: Finished difference Result 3142 states and 6130 transitions.
[2019-11-23 21:08:52,821 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:52,822 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 55
[2019-11-23 21:08:52,823 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:52,861 INFO  L225             Difference]: With dead ends: 3142
[2019-11-23 21:08:52,861 INFO  L226             Difference]: Without dead ends: 2257
[2019-11-23 21:08:52,869 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 21:08:52,894 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2257 states.
[2019-11-23 21:08:52,999 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257.
[2019-11-23 21:08:53,001 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2257 states.
[2019-11-23 21:08:53,009 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3685 transitions.
[2019-11-23 21:08:53,010 INFO  L78                 Accepts]: Start accepts. Automaton has 2257 states and 3685 transitions. Word has length 55
[2019-11-23 21:08:53,011 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:53,011 INFO  L462      AbstractCegarLoop]: Abstraction has 2257 states and 3685 transitions.
[2019-11-23 21:08:53,011 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:08:53,012 INFO  L276                IsEmpty]: Start isEmpty. Operand 2257 states and 3685 transitions.
[2019-11-23 21:08:53,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 127
[2019-11-23 21:08:53,018 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:53,019 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, 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]
[2019-11-23 21:08:53,020 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:53,020 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:53,020 INFO  L82        PathProgramCache]: Analyzing trace with hash -813440669, now seen corresponding path program 1 times
[2019-11-23 21:08:53,020 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:53,021 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430628733]
[2019-11-23 21:08:53,022 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:53,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:53,288 INFO  L134       CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:08:53,288 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430628733]
[2019-11-23 21:08:53,289 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:53,289 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:08:53,289 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585686730]
[2019-11-23 21:08:53,291 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:53,291 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:53,292 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:53,292 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:53,292 INFO  L87              Difference]: Start difference. First operand 2257 states and 3685 transitions. Second operand 4 states.
[2019-11-23 21:09:01,704 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:01,705 INFO  L93              Difference]: Finished difference Result 9018 states and 14732 transitions.
[2019-11-23 21:09:01,705 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:01,705 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 126
[2019-11-23 21:09:01,706 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:01,738 INFO  L225             Difference]: With dead ends: 9018
[2019-11-23 21:09:01,738 INFO  L226             Difference]: Without dead ends: 6763
[2019-11-23 21:09:01,743 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 21:09:01,750 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6763 states.
[2019-11-23 21:09:01,854 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763.
[2019-11-23 21:09:01,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6763 states.
[2019-11-23 21:09:01,867 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9613 transitions.
[2019-11-23 21:09:01,867 INFO  L78                 Accepts]: Start accepts. Automaton has 6763 states and 9613 transitions. Word has length 126
[2019-11-23 21:09:01,868 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:01,868 INFO  L462      AbstractCegarLoop]: Abstraction has 6763 states and 9613 transitions.
[2019-11-23 21:09:01,868 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:01,869 INFO  L276                IsEmpty]: Start isEmpty. Operand 6763 states and 9613 transitions.
[2019-11-23 21:09:01,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 133
[2019-11-23 21:09:01,873 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:01,873 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, 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]
[2019-11-23 21:09:01,874 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:01,874 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:01,874 INFO  L82        PathProgramCache]: Analyzing trace with hash -1783976430, now seen corresponding path program 1 times
[2019-11-23 21:09:01,874 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:01,875 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475692638]
[2019-11-23 21:09:01,875 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:01,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:02,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:09:02,237 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475692638]
[2019-11-23 21:09:02,237 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:02,238 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-23 21:09:02,238 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949517396]
[2019-11-23 21:09:02,239 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-23 21:09:02,239 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:02,239 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-23 21:09:02,239 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:02,240 INFO  L87              Difference]: Start difference. First operand 6763 states and 9613 transitions. Second operand 6 states.
[2019-11-23 21:09:12,063 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:12,064 INFO  L93              Difference]: Finished difference Result 21034 states and 29741 transitions.
[2019-11-23 21:09:12,064 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:12,065 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 132
[2019-11-23 21:09:12,065 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:12,117 INFO  L225             Difference]: With dead ends: 21034
[2019-11-23 21:09:12,117 INFO  L226             Difference]: Without dead ends: 14273
[2019-11-23 21:09:12,126 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 21:09:12,141 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14273 states.
[2019-11-23 21:09:12,366 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273.
[2019-11-23 21:09:12,366 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14273 states.
[2019-11-23 21:09:12,401 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 19733 transitions.
[2019-11-23 21:09:12,404 INFO  L78                 Accepts]: Start accepts. Automaton has 14273 states and 19733 transitions. Word has length 132
[2019-11-23 21:09:12,405 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:12,405 INFO  L462      AbstractCegarLoop]: Abstraction has 14273 states and 19733 transitions.
[2019-11-23 21:09:12,406 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-23 21:09:12,412 INFO  L276                IsEmpty]: Start isEmpty. Operand 14273 states and 19733 transitions.
[2019-11-23 21:09:12,425 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 341
[2019-11-23 21:09:12,425 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:12,426 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, 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, 2, 2, 2, 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 21:09:12,426 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:12,426 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:12,427 INFO  L82        PathProgramCache]: Analyzing trace with hash -970432128, now seen corresponding path program 1 times
[2019-11-23 21:09:12,427 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:12,427 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123563701]
[2019-11-23 21:09:12,428 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:12,467 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:12,928 INFO  L134       CoverageAnalysis]: Checked inductivity of 402 backedges. 256 proven. 4 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked.
[2019-11-23 21:09:12,929 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123563701]
[2019-11-23 21:09:12,929 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423873944]
[2019-11-23 21:09:12,929 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 21:09:13,041 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:13,044 INFO  L255         TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-11-23 21:09:13,060 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:13,231 INFO  L134       CoverageAnalysis]: Checked inductivity of 402 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked.
[2019-11-23 21:09:13,232 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:13,232 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-23 21:09:13,233 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364092483]
[2019-11-23 21:09:13,236 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:13,236 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:13,237 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:13,237 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:13,237 INFO  L87              Difference]: Start difference. First operand 14273 states and 19733 transitions. Second operand 3 states.
[2019-11-23 21:09:16,211 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:16,212 INFO  L93              Difference]: Finished difference Result 27830 states and 38744 transitions.
[2019-11-23 21:09:16,212 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:16,212 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 340
[2019-11-23 21:09:16,213 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:16,284 INFO  L225             Difference]: With dead ends: 27830
[2019-11-23 21:09:16,284 INFO  L226             Difference]: Without dead ends: 14273
[2019-11-23 21:09:16,301 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 340 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 21:09:16,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14273 states.
[2019-11-23 21:09:16,575 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273.
[2019-11-23 21:09:16,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14273 states.
[2019-11-23 21:09:16,596 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 18747 transitions.
[2019-11-23 21:09:16,596 INFO  L78                 Accepts]: Start accepts. Automaton has 14273 states and 18747 transitions. Word has length 340
[2019-11-23 21:09:16,596 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:16,597 INFO  L462      AbstractCegarLoop]: Abstraction has 14273 states and 18747 transitions.
[2019-11-23 21:09:16,597 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:16,597 INFO  L276                IsEmpty]: Start isEmpty. Operand 14273 states and 18747 transitions.
[2019-11-23 21:09:16,614 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 483
[2019-11-23 21:09:16,615 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:16,615 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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 21:09:16,829 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:16,830 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:16,830 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:16,830 INFO  L82        PathProgramCache]: Analyzing trace with hash -291125914, now seen corresponding path program 1 times
[2019-11-23 21:09:16,830 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:16,831 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470025125]
[2019-11-23 21:09:16,831 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:16,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:17,190 INFO  L134       CoverageAnalysis]: Checked inductivity of 742 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked.
[2019-11-23 21:09:17,191 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470025125]
[2019-11-23 21:09:17,191 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:17,191 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:17,192 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907521385]
[2019-11-23 21:09:17,192 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:17,193 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:17,193 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:17,193 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:17,193 INFO  L87              Difference]: Start difference. First operand 14273 states and 18747 transitions. Second operand 4 states.
[2019-11-23 21:09:23,091 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:23,091 INFO  L93              Difference]: Finished difference Result 34552 states and 45643 transitions.
[2019-11-23 21:09:23,098 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:23,098 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 482
[2019-11-23 21:09:23,099 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:23,144 INFO  L225             Difference]: With dead ends: 34552
[2019-11-23 21:09:23,144 INFO  L226             Difference]: Without dead ends: 21032
[2019-11-23 21:09:23,159 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 21:09:23,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21032 states.
[2019-11-23 21:09:23,422 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 21032.
[2019-11-23 21:09:23,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21032 states.
[2019-11-23 21:09:23,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 26927 transitions.
[2019-11-23 21:09:23,449 INFO  L78                 Accepts]: Start accepts. Automaton has 21032 states and 26927 transitions. Word has length 482
[2019-11-23 21:09:23,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:23,450 INFO  L462      AbstractCegarLoop]: Abstraction has 21032 states and 26927 transitions.
[2019-11-23 21:09:23,450 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:23,450 INFO  L276                IsEmpty]: Start isEmpty. Operand 21032 states and 26927 transitions.
[2019-11-23 21:09:23,470 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 500
[2019-11-23 21:09:23,470 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:23,471 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, 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, 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 21:09:23,471 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:23,472 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:23,472 INFO  L82        PathProgramCache]: Analyzing trace with hash -1638641608, now seen corresponding path program 1 times
[2019-11-23 21:09:23,472 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:23,472 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387890724]
[2019-11-23 21:09:23,473 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:23,557 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:24,078 INFO  L134       CoverageAnalysis]: Checked inductivity of 781 backedges. 644 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked.
[2019-11-23 21:09:24,078 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387890724]
[2019-11-23 21:09:24,078 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:24,079 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:09:24,079 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750986854]
[2019-11-23 21:09:24,080 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:24,080 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:24,080 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:24,081 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:09:24,082 INFO  L87              Difference]: Start difference. First operand 21032 states and 26927 transitions. Second operand 3 states.
[2019-11-23 21:09:28,511 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:28,512 INFO  L93              Difference]: Finished difference Result 60837 states and 78400 transitions.
[2019-11-23 21:09:28,512 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:28,512 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 499
[2019-11-23 21:09:28,513 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:28,576 INFO  L225             Difference]: With dead ends: 60837
[2019-11-23 21:09:28,577 INFO  L226             Difference]: Without dead ends: 40558
[2019-11-23 21:09:28,599 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 21:09:28,635 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40558 states.
[2019-11-23 21:09:29,060 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40558 to 39807.
[2019-11-23 21:09:29,060 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39807 states.
[2019-11-23 21:09:29,111 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 50806 transitions.
[2019-11-23 21:09:29,111 INFO  L78                 Accepts]: Start accepts. Automaton has 39807 states and 50806 transitions. Word has length 499
[2019-11-23 21:09:29,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:29,114 INFO  L462      AbstractCegarLoop]: Abstraction has 39807 states and 50806 transitions.
[2019-11-23 21:09:29,114 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:29,114 INFO  L276                IsEmpty]: Start isEmpty. Operand 39807 states and 50806 transitions.
[2019-11-23 21:09:29,143 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 502
[2019-11-23 21:09:29,147 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:29,148 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 21:09:29,148 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:29,149 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:29,149 INFO  L82        PathProgramCache]: Analyzing trace with hash 624002736, now seen corresponding path program 1 times
[2019-11-23 21:09:29,150 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:29,151 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652296969]
[2019-11-23 21:09:29,151 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:29,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:30,157 INFO  L134       CoverageAnalysis]: Checked inductivity of 764 backedges. 483 proven. 5 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked.
[2019-11-23 21:09:30,159 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652296969]
[2019-11-23 21:09:30,159 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127759672]
[2019-11-23 21:09:30,159 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 21:09:30,391 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:30,393 INFO  L255         TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:09:30,412 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:30,779 INFO  L134       CoverageAnalysis]: Checked inductivity of 764 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked.
[2019-11-23 21:09:30,779 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:30,780 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8
[2019-11-23 21:09:30,780 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110034365]
[2019-11-23 21:09:30,781 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:30,781 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:30,781 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:30,781 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:09:30,781 INFO  L87              Difference]: Start difference. First operand 39807 states and 50806 transitions. Second operand 3 states.
[2019-11-23 21:09:35,116 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:35,116 INFO  L93              Difference]: Finished difference Result 105146 states and 133978 transitions.
[2019-11-23 21:09:35,117 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:35,117 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 501
[2019-11-23 21:09:35,117 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:35,198 INFO  L225             Difference]: With dead ends: 105146
[2019-11-23 21:09:35,199 INFO  L226             Difference]: Without dead ends: 66092
[2019-11-23 21:09:35,229 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 500 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:09:35,289 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66092 states.
[2019-11-23 21:09:35,823 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66092 to 51823.
[2019-11-23 21:09:35,824 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51823 states.
[2019-11-23 21:09:35,875 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51823 states to 51823 states and 63678 transitions.
[2019-11-23 21:09:35,875 INFO  L78                 Accepts]: Start accepts. Automaton has 51823 states and 63678 transitions. Word has length 501
[2019-11-23 21:09:35,876 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:35,876 INFO  L462      AbstractCegarLoop]: Abstraction has 51823 states and 63678 transitions.
[2019-11-23 21:09:35,876 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:35,876 INFO  L276                IsEmpty]: Start isEmpty. Operand 51823 states and 63678 transitions.
[2019-11-23 21:09:35,900 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 544
[2019-11-23 21:09:35,900 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:35,901 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, 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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 21:09:36,104 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:36,107 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:36,107 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:36,108 INFO  L82        PathProgramCache]: Analyzing trace with hash -716759099, now seen corresponding path program 1 times
[2019-11-23 21:09:36,108 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:36,108 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899553533]
[2019-11-23 21:09:36,108 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:36,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:36,797 INFO  L134       CoverageAnalysis]: Checked inductivity of 796 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked.
[2019-11-23 21:09:36,797 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899553533]
[2019-11-23 21:09:36,798 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:36,798 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:36,799 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396258743]
[2019-11-23 21:09:36,800 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:36,800 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:36,800 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:36,805 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:36,805 INFO  L87              Difference]: Start difference. First operand 51823 states and 63678 transitions. Second operand 4 states.
[2019-11-23 21:09:43,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:43,937 INFO  L93              Difference]: Finished difference Result 129178 states and 157830 transitions.
[2019-11-23 21:09:43,937 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:43,937 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 543
[2019-11-23 21:09:43,938 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:44,029 INFO  L225             Difference]: With dead ends: 129178
[2019-11-23 21:09:44,030 INFO  L226             Difference]: Without dead ends: 78108
[2019-11-23 21:09:44,072 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 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 21:09:44,145 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78108 states.
[2019-11-23 21:09:44,902 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78108 to 71349.
[2019-11-23 21:09:44,902 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 71349 states.
[2019-11-23 21:09:45,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71349 states to 71349 states and 83939 transitions.
[2019-11-23 21:09:45,011 INFO  L78                 Accepts]: Start accepts. Automaton has 71349 states and 83939 transitions. Word has length 543
[2019-11-23 21:09:45,012 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:45,012 INFO  L462      AbstractCegarLoop]: Abstraction has 71349 states and 83939 transitions.
[2019-11-23 21:09:45,013 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:45,013 INFO  L276                IsEmpty]: Start isEmpty. Operand 71349 states and 83939 transitions.
[2019-11-23 21:09:45,032 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 557
[2019-11-23 21:09:45,032 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:45,033 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:09:45,033 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:45,033 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:45,033 INFO  L82        PathProgramCache]: Analyzing trace with hash -2071713589, now seen corresponding path program 1 times
[2019-11-23 21:09:45,034 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:45,034 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994945336]
[2019-11-23 21:09:45,034 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:45,108 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:46,019 INFO  L134       CoverageAnalysis]: Checked inductivity of 455 backedges. 162 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked.
[2019-11-23 21:09:46,019 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994945336]
[2019-11-23 21:09:46,020 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281669137]
[2019-11-23 21:09:46,020 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 21:09:46,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:46,187 INFO  L255         TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:09:46,194 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:46,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 455 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked.
[2019-11-23 21:09:46,666 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:46,666 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7
[2019-11-23 21:09:46,666 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95380646]
[2019-11-23 21:09:46,667 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:46,667 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:46,667 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:46,667 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:09:46,668 INFO  L87              Difference]: Start difference. First operand 71349 states and 83939 transitions. Second operand 3 states.
[2019-11-23 21:09:51,012 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:51,012 INFO  L93              Difference]: Finished difference Result 141945 states and 167120 transitions.
[2019-11-23 21:09:51,013 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:51,013 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 556
[2019-11-23 21:09:51,014 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:51,102 INFO  L225             Difference]: With dead ends: 141945
[2019-11-23 21:09:51,102 INFO  L226             Difference]: Without dead ends: 71349
[2019-11-23 21:09:51,136 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 556 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 21:09:51,205 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71349 states.
[2019-11-23 21:09:51,990 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71349 to 70598.
[2019-11-23 21:09:51,990 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70598 states.
[2019-11-23 21:09:52,111 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70598 states to 70598 states and 79787 transitions.
[2019-11-23 21:09:52,111 INFO  L78                 Accepts]: Start accepts. Automaton has 70598 states and 79787 transitions. Word has length 556
[2019-11-23 21:09:52,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:52,113 INFO  L462      AbstractCegarLoop]: Abstraction has 70598 states and 79787 transitions.
[2019-11-23 21:09:52,113 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:52,113 INFO  L276                IsEmpty]: Start isEmpty. Operand 70598 states and 79787 transitions.
[2019-11-23 21:09:52,149 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 624
[2019-11-23 21:09:52,149 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:52,150 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:52,353 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:52,354 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:52,354 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:52,355 INFO  L82        PathProgramCache]: Analyzing trace with hash 1026422973, now seen corresponding path program 1 times
[2019-11-23 21:09:52,355 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:52,355 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623980274]
[2019-11-23 21:09:52,355 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:52,450 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:53,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 495 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked.
[2019-11-23 21:09:53,654 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623980274]
[2019-11-23 21:09:53,654 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:53,654 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:53,655 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204997496]
[2019-11-23 21:09:53,655 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 21:09:53,656 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:53,656 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 21:09:53,656 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 21:09:53,656 INFO  L87              Difference]: Start difference. First operand 70598 states and 79787 transitions. Second operand 5 states.