/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_label24.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 21:08:27,672 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-23 21:08:27,675 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-23 21:08:27,686 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-23 21:08:27,687 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-23 21:08:27,688 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-23 21:08:27,689 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-23 21:08:27,691 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-23 21:08:27,692 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-23 21:08:27,693 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-23 21:08:27,694 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-23 21:08:27,695 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-23 21:08:27,696 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-23 21:08:27,696 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-23 21:08:27,697 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-23 21:08:27,698 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-23 21:08:27,699 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-23 21:08:27,700 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-23 21:08:27,702 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-23 21:08:27,704 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-23 21:08:27,705 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-23 21:08:27,706 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-23 21:08:27,707 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-23 21:08:27,708 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-23 21:08:27,712 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-23 21:08:27,713 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-23 21:08:27,713 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-23 21:08:27,714 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-23 21:08:27,714 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-23 21:08:27,715 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-23 21:08:27,715 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-23 21:08:27,719 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-23 21:08:27,719 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-23 21:08:27,720 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-23 21:08:27,721 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-23 21:08:27,721 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-23 21:08:27,722 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-23 21:08:27,722 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-23 21:08:27,725 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-23 21:08:27,726 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-23 21:08:27,727 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 21:08:27,727 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 21:08:27,754 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 21:08:27,754 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 21:08:27,757 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-23 21:08:27,758 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-23 21:08:27,758 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-23 21:08:27,758 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 21:08:27,758 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 21:08:27,759 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 21:08:27,759 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 21:08:27,759 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 21:08:27,760 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 21:08:27,760 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 21:08:27,761 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 21:08:27,761 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-23 21:08:27,761 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 21:08:27,761 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 21:08:27,761 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-23 21:08:27,762 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 21:08:27,762 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 21:08:27,762 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-23 21:08:27,763 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 21:08:27,763 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 21:08:27,763 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 21:08:27,763 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 21:08:27,763 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 21:08:27,764 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 21:08:27,764 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-23 21:08:27,764 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 21:08:27,764 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 21:08:27,764 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 21:08:28,055 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 21:08:28,069 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 21:08:28,073 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 21:08:28,074 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 21:08:28,075 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 21:08:28,075 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24.c
[2019-11-23 21:08:28,146 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39d2da0c6/da1bb5fd3962471eb8f4c5e9b51197ae/FLAGbf194620a
[2019-11-23 21:08:28,866 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 21:08:28,866 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24.c
[2019-11-23 21:08:28,896 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39d2da0c6/da1bb5fd3962471eb8f4c5e9b51197ae/FLAGbf194620a
[2019-11-23 21:08:28,973 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39d2da0c6/da1bb5fd3962471eb8f4c5e9b51197ae
[2019-11-23 21:08:28,985 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 21:08:28,987 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 21:08:28,989 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 21:08:28,989 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 21:08:28,993 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 21:08:28,994 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:28" (1/1) ...
[2019-11-23 21:08:28,997 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3128fc7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:28, skipping insertion in model container
[2019-11-23 21:08:28,997 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:28" (1/1) ...
[2019-11-23 21:08:29,005 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 21:08:29,169 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 21:08:30,641 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:08:30,648 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 21:08:31,387 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:08:31,419 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 21:08:31,421 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31 WrapperNode
[2019-11-23 21:08:31,421 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 21:08:31,422 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 21:08:31,422 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 21:08:31,422 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 21:08:31,431 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:31,482 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:31,713 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 21:08:31,714 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 21:08:31,714 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 21:08:31,714 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 21:08:31,826 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:31,826 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:31,860 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:31,860 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:32,041 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:32,090 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:32,127 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (1/1) ...
[2019-11-23 21:08:32,197 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 21:08:32,198 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 21:08:32,198 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 21:08:32,198 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 21:08:32,199 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (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 21:08:32,274 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 21:08:32,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 21:08:38,229 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 21:08:38,229 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 21:08:38,233 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:38 BoogieIcfgContainer
[2019-11-23 21:08:38,234 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 21:08:38,237 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 21:08:38,238 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 21:08:38,242 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 21:08:38,242 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:28" (1/3) ...
[2019-11-23 21:08:38,243 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30261b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:38, skipping insertion in model container
[2019-11-23 21:08:38,243 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:31" (2/3) ...
[2019-11-23 21:08:38,244 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30261b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:38, skipping insertion in model container
[2019-11-23 21:08:38,245 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:38" (3/3) ...
[2019-11-23 21:08:38,247 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem12_label24.c
[2019-11-23 21:08:38,257 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 21:08:38,268 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 21:08:38,280 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 21:08:38,323 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 21:08:38,323 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 21:08:38,323 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 21:08:38,323 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 21:08:38,324 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 21:08:38,324 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 21:08:38,324 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 21:08:38,324 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 21:08:38,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 818 states.
[2019-11-23 21:08:38,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2019-11-23 21:08:38,362 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:38,363 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]
[2019-11-23 21:08:38,363 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:38,370 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:38,370 INFO  L82        PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times
[2019-11-23 21:08:38,380 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:38,380 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453534035]
[2019-11-23 21:08:38,381 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:38,507 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:38,705 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 21:08:38,706 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453534035]
[2019-11-23 21:08:38,707 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:38,707 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:08:38,709 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214961611]
[2019-11-23 21:08:38,715 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:38,716 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:38,730 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:38,731 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:38,733 INFO  L87              Difference]: Start difference. First operand 818 states. Second operand 4 states.
[2019-11-23 21:08:47,774 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:47,774 INFO  L93              Difference]: Finished difference Result 3142 states and 6130 transitions.
[2019-11-23 21:08:47,775 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:47,776 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 46
[2019-11-23 21:08:47,777 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:47,819 INFO  L225             Difference]: With dead ends: 3142
[2019-11-23 21:08:47,820 INFO  L226             Difference]: Without dead ends: 2257
[2019-11-23 21:08:47,831 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 21:08:47,858 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2257 states.
[2019-11-23 21:08:47,968 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257.
[2019-11-23 21:08:47,969 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2257 states.
[2019-11-23 21:08:47,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3685 transitions.
[2019-11-23 21:08:47,983 INFO  L78                 Accepts]: Start accepts. Automaton has 2257 states and 3685 transitions. Word has length 46
[2019-11-23 21:08:47,983 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:47,983 INFO  L462      AbstractCegarLoop]: Abstraction has 2257 states and 3685 transitions.
[2019-11-23 21:08:47,984 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:08:47,984 INFO  L276                IsEmpty]: Start isEmpty. Operand 2257 states and 3685 transitions.
[2019-11-23 21:08:47,993 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 118
[2019-11-23 21:08:47,994 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:47,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:47,995 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:47,995 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:47,996 INFO  L82        PathProgramCache]: Analyzing trace with hash -1461296935, now seen corresponding path program 1 times
[2019-11-23 21:08:47,996 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:47,996 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982715717]
[2019-11-23 21:08:47,997 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:48,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:48,209 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:08:48,209 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982715717]
[2019-11-23 21:08:48,209 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:48,210 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:08:48,210 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681580830]
[2019-11-23 21:08:48,212 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:08:48,212 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:48,212 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:08:48,212 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:08:48,213 INFO  L87              Difference]: Start difference. First operand 2257 states and 3685 transitions. Second operand 4 states.
[2019-11-23 21:08:56,381 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:08:56,382 INFO  L93              Difference]: Finished difference Result 9018 states and 14732 transitions.
[2019-11-23 21:08:56,387 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:08:56,387 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 117
[2019-11-23 21:08:56,388 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:08:56,420 INFO  L225             Difference]: With dead ends: 9018
[2019-11-23 21:08:56,420 INFO  L226             Difference]: Without dead ends: 6763
[2019-11-23 21:08:56,430 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 21:08:56,440 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6763 states.
[2019-11-23 21:08:56,583 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763.
[2019-11-23 21:08:56,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6763 states.
[2019-11-23 21:08:56,597 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9613 transitions.
[2019-11-23 21:08:56,597 INFO  L78                 Accepts]: Start accepts. Automaton has 6763 states and 9613 transitions. Word has length 117
[2019-11-23 21:08:56,601 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:08:56,601 INFO  L462      AbstractCegarLoop]: Abstraction has 6763 states and 9613 transitions.
[2019-11-23 21:08:56,601 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:08:56,601 INFO  L276                IsEmpty]: Start isEmpty. Operand 6763 states and 9613 transitions.
[2019-11-23 21:08:56,607 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2019-11-23 21:08:56,607 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:08:56,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:56,608 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:08:56,608 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:08:56,608 INFO  L82        PathProgramCache]: Analyzing trace with hash -677945718, now seen corresponding path program 1 times
[2019-11-23 21:08:56,609 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:08:56,609 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493103346]
[2019-11-23 21:08:56,609 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:08:56,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:08:56,984 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:08:56,985 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493103346]
[2019-11-23 21:08:56,986 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:08:56,986 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-23 21:08:56,986 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973438784]
[2019-11-23 21:08:56,988 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-23 21:08:56,989 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:08:56,989 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-23 21:08:56,990 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:08:56,990 INFO  L87              Difference]: Start difference. First operand 6763 states and 9613 transitions. Second operand 6 states.
[2019-11-23 21:09:07,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:07,005 INFO  L93              Difference]: Finished difference Result 21034 states and 29741 transitions.
[2019-11-23 21:09:07,006 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:07,006 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 123
[2019-11-23 21:09:07,006 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:07,067 INFO  L225             Difference]: With dead ends: 21034
[2019-11-23 21:09:07,068 INFO  L226             Difference]: Without dead ends: 14273
[2019-11-23 21:09:07,077 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:07,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14273 states.
[2019-11-23 21:09:07,348 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273.
[2019-11-23 21:09:07,349 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14273 states.
[2019-11-23 21:09:07,386 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 19734 transitions.
[2019-11-23 21:09:07,386 INFO  L78                 Accepts]: Start accepts. Automaton has 14273 states and 19734 transitions. Word has length 123
[2019-11-23 21:09:07,387 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:07,387 INFO  L462      AbstractCegarLoop]: Abstraction has 14273 states and 19734 transitions.
[2019-11-23 21:09:07,387 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-23 21:09:07,387 INFO  L276                IsEmpty]: Start isEmpty. Operand 14273 states and 19734 transitions.
[2019-11-23 21:09:07,390 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 195
[2019-11-23 21:09:07,390 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:07,391 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:09:07,391 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:07,391 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:07,391 INFO  L82        PathProgramCache]: Analyzing trace with hash -1971585797, now seen corresponding path program 1 times
[2019-11-23 21:09:07,392 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:07,392 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768679202]
[2019-11-23 21:09:07,392 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:07,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:07,745 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-11-23 21:09:07,746 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768679202]
[2019-11-23 21:09:07,746 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696014026]
[2019-11-23 21:09:07,746 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 21:09:07,912 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:07,915 INFO  L255         TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:09:07,926 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:07,987 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:09:07,988 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:07,988 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2019-11-23 21:09:07,989 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630282525]
[2019-11-23 21:09:07,990 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:07,990 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:07,991 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:07,991 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:07,991 INFO  L87              Difference]: Start difference. First operand 14273 states and 19734 transitions. Second operand 3 states.
[2019-11-23 21:09:12,579 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:12,579 INFO  L93              Difference]: Finished difference Result 40560 states and 56247 transitions.
[2019-11-23 21:09:12,580 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:12,580 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 194
[2019-11-23 21:09:12,582 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:12,649 INFO  L225             Difference]: With dead ends: 40560
[2019-11-23 21:09:12,649 INFO  L226             Difference]: Without dead ends: 27040
[2019-11-23 21:09:12,666 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 193 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:12,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27040 states.
[2019-11-23 21:09:13,127 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 21783.
[2019-11-23 21:09:13,127 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21783 states.
[2019-11-23 21:09:13,160 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21783 states to 21783 states and 28883 transitions.
[2019-11-23 21:09:13,161 INFO  L78                 Accepts]: Start accepts. Automaton has 21783 states and 28883 transitions. Word has length 194
[2019-11-23 21:09:13,162 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:13,162 INFO  L462      AbstractCegarLoop]: Abstraction has 21783 states and 28883 transitions.
[2019-11-23 21:09:13,162 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:13,162 INFO  L276                IsEmpty]: Start isEmpty. Operand 21783 states and 28883 transitions.
[2019-11-23 21:09:13,169 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 216
[2019-11-23 21:09:13,169 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:13,169 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:13,372 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:13,372 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:13,373 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:13,373 INFO  L82        PathProgramCache]: Analyzing trace with hash 965704800, now seen corresponding path program 1 times
[2019-11-23 21:09:13,373 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:13,374 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651252926]
[2019-11-23 21:09:13,374 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:13,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:13,636 WARN  L192               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9
[2019-11-23 21:09:13,797 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-11-23 21:09:13,798 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651252926]
[2019-11-23 21:09:13,798 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614174463]
[2019-11-23 21:09:13,798 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 21:09:13,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:13,877 INFO  L255         TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-11-23 21:09:13,883 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:13,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-11-23 21:09:13,974 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:13,974 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-23 21:09:13,975 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624672246]
[2019-11-23 21:09:13,975 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:13,975 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:13,976 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:13,976 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:13,976 INFO  L87              Difference]: Start difference. First operand 21783 states and 28883 transitions. Second operand 3 states.
[2019-11-23 21:09:17,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:17,024 INFO  L93              Difference]: Finished difference Result 42850 states and 57044 transitions.
[2019-11-23 21:09:17,024 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:17,025 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 215
[2019-11-23 21:09:17,025 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:17,071 INFO  L225             Difference]: With dead ends: 42850
[2019-11-23 21:09:17,071 INFO  L226             Difference]: Without dead ends: 21783
[2019-11-23 21:09:17,092 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:17,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21783 states.
[2019-11-23 21:09:17,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 21783.
[2019-11-23 21:09:17,427 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21783 states.
[2019-11-23 21:09:17,455 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21783 states to 21783 states and 27546 transitions.
[2019-11-23 21:09:17,455 INFO  L78                 Accepts]: Start accepts. Automaton has 21783 states and 27546 transitions. Word has length 215
[2019-11-23 21:09:17,455 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:17,455 INFO  L462      AbstractCegarLoop]: Abstraction has 21783 states and 27546 transitions.
[2019-11-23 21:09:17,455 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:17,456 INFO  L276                IsEmpty]: Start isEmpty. Operand 21783 states and 27546 transitions.
[2019-11-23 21:09:17,463 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 365
[2019-11-23 21:09:17,463 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:17,464 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:17,676 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:17,676 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:17,676 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:17,677 INFO  L82        PathProgramCache]: Analyzing trace with hash -266523828, now seen corresponding path program 1 times
[2019-11-23 21:09:17,677 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:17,677 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163507934]
[2019-11-23 21:09:17,677 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:17,750 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:18,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 385 backedges. 233 proven. 6 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked.
[2019-11-23 21:09:18,310 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163507934]
[2019-11-23 21:09:18,310 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848119130]
[2019-11-23 21:09:18,310 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 21:09:18,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:18,425 INFO  L255         TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:09:18,446 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:18,540 INFO  L134       CoverageAnalysis]: Checked inductivity of 385 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2019-11-23 21:09:18,541 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:18,541 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2019-11-23 21:09:18,541 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339038177]
[2019-11-23 21:09:18,542 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:18,542 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:18,542 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:18,543 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:18,543 INFO  L87              Difference]: Start difference. First operand 21783 states and 27546 transitions. Second operand 3 states.
[2019-11-23 21:09:22,572 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:22,573 INFO  L93              Difference]: Finished difference Result 48821 states and 61672 transitions.
[2019-11-23 21:09:22,573 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:22,573 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 364
[2019-11-23 21:09:22,573 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:22,614 INFO  L225             Difference]: With dead ends: 48821
[2019-11-23 21:09:22,614 INFO  L226             Difference]: Without dead ends: 27791
[2019-11-23 21:09:22,641 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 363 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:22,667 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27791 states.
[2019-11-23 21:09:22,953 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 27791.
[2019-11-23 21:09:22,953 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27791 states.
[2019-11-23 21:09:22,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 32577 transitions.
[2019-11-23 21:09:23,000 INFO  L78                 Accepts]: Start accepts. Automaton has 27791 states and 32577 transitions. Word has length 364
[2019-11-23 21:09:23,000 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:23,001 INFO  L462      AbstractCegarLoop]: Abstraction has 27791 states and 32577 transitions.
[2019-11-23 21:09:23,001 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:23,001 INFO  L276                IsEmpty]: Start isEmpty. Operand 27791 states and 32577 transitions.
[2019-11-23 21:09:23,010 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 403
[2019-11-23 21:09:23,010 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:23,011 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 21:09:23,336 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:23,336 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:23,336 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:23,336 INFO  L82        PathProgramCache]: Analyzing trace with hash -1108390803, now seen corresponding path program 1 times
[2019-11-23 21:09:23,336 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:23,337 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507590490]
[2019-11-23 21:09:23,337 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:23,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:23,633 INFO  L134       CoverageAnalysis]: Checked inductivity of 442 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked.
[2019-11-23 21:09:23,634 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507590490]
[2019-11-23 21:09:23,634 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:23,634 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:23,634 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680316731]
[2019-11-23 21:09:23,635 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:23,635 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:23,635 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:23,636 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:23,636 INFO  L87              Difference]: Start difference. First operand 27791 states and 32577 transitions. Second operand 4 states.
[2019-11-23 21:09:29,460 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:29,460 INFO  L93              Difference]: Finished difference Result 59335 states and 69889 transitions.
[2019-11-23 21:09:29,460 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:29,460 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 402
[2019-11-23 21:09:29,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:29,500 INFO  L225             Difference]: With dead ends: 59335
[2019-11-23 21:09:29,501 INFO  L226             Difference]: Without dead ends: 32297
[2019-11-23 21:09:29,519 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 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 21:09:29,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32297 states.
[2019-11-23 21:09:29,995 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32297 to 32297.
[2019-11-23 21:09:29,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32297 states.
[2019-11-23 21:09:30,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32297 states to 32297 states and 37165 transitions.
[2019-11-23 21:09:30,049 INFO  L78                 Accepts]: Start accepts. Automaton has 32297 states and 37165 transitions. Word has length 402
[2019-11-23 21:09:30,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:30,049 INFO  L462      AbstractCegarLoop]: Abstraction has 32297 states and 37165 transitions.
[2019-11-23 21:09:30,050 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:30,050 INFO  L276                IsEmpty]: Start isEmpty. Operand 32297 states and 37165 transitions.
[2019-11-23 21:09:30,079 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 446
[2019-11-23 21:09:30,079 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:30,080 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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]
[2019-11-23 21:09:30,080 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:30,080 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:30,081 INFO  L82        PathProgramCache]: Analyzing trace with hash 1724112370, now seen corresponding path program 1 times
[2019-11-23 21:09:30,082 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:30,082 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328051622]
[2019-11-23 21:09:30,082 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:30,147 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:30,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 663 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked.
[2019-11-23 21:09:30,400 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328051622]
[2019-11-23 21:09:30,401 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:30,401 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:30,402 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180794143]
[2019-11-23 21:09:30,402 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:30,403 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:30,403 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:30,403 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:30,403 INFO  L87              Difference]: Start difference. First operand 32297 states and 37165 transitions. Second operand 4 states.
[2019-11-23 21:09:37,026 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:37,026 INFO  L93              Difference]: Finished difference Result 80363 states and 92217 transitions.
[2019-11-23 21:09:37,026 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:37,026 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 445
[2019-11-23 21:09:37,027 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:37,067 INFO  L225             Difference]: With dead ends: 80363
[2019-11-23 21:09:37,067 INFO  L226             Difference]: Without dead ends: 48819
[2019-11-23 21:09:37,083 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 21:09:37,120 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48819 states.
[2019-11-23 21:09:37,527 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 45064.
[2019-11-23 21:09:37,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45064 states.
[2019-11-23 21:09:37,580 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 51147 transitions.
[2019-11-23 21:09:37,581 INFO  L78                 Accepts]: Start accepts. Automaton has 45064 states and 51147 transitions. Word has length 445
[2019-11-23 21:09:37,581 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:37,581 INFO  L462      AbstractCegarLoop]: Abstraction has 45064 states and 51147 transitions.
[2019-11-23 21:09:37,582 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:37,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 45064 states and 51147 transitions.
[2019-11-23 21:09:37,598 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 478
[2019-11-23 21:09:37,598 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:37,598 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:37,599 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:37,599 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:37,599 INFO  L82        PathProgramCache]: Analyzing trace with hash 1592355294, now seen corresponding path program 1 times
[2019-11-23 21:09:37,599 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:37,600 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182467051]
[2019-11-23 21:09:37,600 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:37,665 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:38,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 504 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked.
[2019-11-23 21:09:38,238 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182467051]
[2019-11-23 21:09:38,238 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:38,238 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:38,238 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596366351]
[2019-11-23 21:09:38,239 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:38,239 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:38,240 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:38,240 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:38,240 INFO  L87              Difference]: Start difference. First operand 45064 states and 51147 transitions. Second operand 4 states.
[2019-11-23 21:09:44,133 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:44,133 INFO  L93              Difference]: Finished difference Result 92379 states and 104642 transitions.
[2019-11-23 21:09:44,133 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:44,134 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 477
[2019-11-23 21:09:44,134 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:44,179 INFO  L225             Difference]: With dead ends: 92379
[2019-11-23 21:09:44,179 INFO  L226             Difference]: Without dead ends: 48068
[2019-11-23 21:09:44,199 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:44,232 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48068 states.
[2019-11-23 21:09:44,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 45064.
[2019-11-23 21:09:44,512 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45064 states.
[2019-11-23 21:09:44,558 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 50619 transitions.
[2019-11-23 21:09:44,559 INFO  L78                 Accepts]: Start accepts. Automaton has 45064 states and 50619 transitions. Word has length 477
[2019-11-23 21:09:44,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:44,559 INFO  L462      AbstractCegarLoop]: Abstraction has 45064 states and 50619 transitions.
[2019-11-23 21:09:44,559 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:44,560 INFO  L276                IsEmpty]: Start isEmpty. Operand 45064 states and 50619 transitions.
[2019-11-23 21:09:44,576 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 482
[2019-11-23 21:09:44,577 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:44,577 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:44,577 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:44,578 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:44,578 INFO  L82        PathProgramCache]: Analyzing trace with hash -628998444, now seen corresponding path program 1 times
[2019-11-23 21:09:44,578 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:44,578 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607798954]
[2019-11-23 21:09:44,578 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:44,648 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:45,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked.
[2019-11-23 21:09:45,294 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607798954]
[2019-11-23 21:09:45,294 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69812468]
[2019-11-23 21:09:45,294 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:45,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:45,436 INFO  L255         TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-11-23 21:09:45,443 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:45,456 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:09:45,457 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:09:45,942 INFO  L134       CoverageAnalysis]: Checked inductivity of 508 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked.
[2019-11-23 21:09:45,942 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:45,943 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-23 21:09:45,943 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464434084]
[2019-11-23 21:09:45,944 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:45,944 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:45,944 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:45,944 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:45,944 INFO  L87              Difference]: Start difference. First operand 45064 states and 50619 transitions. Second operand 4 states.