/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label44.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 23:39:40,453 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-23 23:39:40,455 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-23 23:39:40,467 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-23 23:39:40,467 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-23 23:39:40,468 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-23 23:39:40,470 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-23 23:39:40,471 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-23 23:39:40,473 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-23 23:39:40,474 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-23 23:39:40,475 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-23 23:39:40,476 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-23 23:39:40,476 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-23 23:39:40,477 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-23 23:39:40,478 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-23 23:39:40,479 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-23 23:39:40,480 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-23 23:39:40,481 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-23 23:39:40,482 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-23 23:39:40,484 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-23 23:39:40,486 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-23 23:39:40,487 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-23 23:39:40,488 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-23 23:39:40,489 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-23 23:39:40,491 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-23 23:39:40,492 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-23 23:39:40,492 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-23 23:39:40,493 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-23 23:39:40,493 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-23 23:39:40,494 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-23 23:39:40,495 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-23 23:39:40,495 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-23 23:39:40,496 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-23 23:39:40,497 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-23 23:39:40,498 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-23 23:39:40,498 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-23 23:39:40,499 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-23 23:39:40,499 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-23 23:39:40,499 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-23 23:39:40,500 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-23 23:39:40,501 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 23:39:40,502 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2019-11-23 23:39:40,517 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 23:39:40,518 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 23:39:40,518 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-23 23:39:40,519 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-23 23:39:40,519 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-23 23:39:40,519 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-23 23:39:40,519 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-23 23:39:40,519 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-23 23:39:40,520 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-23 23:39:40,520 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-23 23:39:40,520 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-23 23:39:40,520 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-23 23:39:40,520 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-23 23:39:40,521 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-23 23:39:40,521 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-23 23:39:40,521 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 23:39:40,523 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 23:39:40,523 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 23:39:40,524 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 23:39:40,524 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 23:39:40,524 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 23:39:40,524 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 23:39:40,524 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 23:39:40,525 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 23:39:40,525 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 23:39:40,526 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 23:39:40,526 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 23:39:40,526 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 23:39:40,526 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 23:39:40,526 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 23:39:40,528 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 23:39:40,528 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 23:39:40,528 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 23:39:40,529 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-23 23:39:40,529 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 23:39:40,529 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 23:39:40,529 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 23:39:40,529 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-23 23:39:40,823 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 23:39:40,846 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 23:39:40,849 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 23:39:40,851 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 23:39:40,851 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 23:39:40,852 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label44.c
[2019-11-23 23:39:40,920 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdecb2f22/bba67c9f1e9c424484fed7696fbd6482/FLAG6a129403b
[2019-11-23 23:39:41,700 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 23:39:41,701 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label44.c
[2019-11-23 23:39:41,740 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdecb2f22/bba67c9f1e9c424484fed7696fbd6482/FLAG6a129403b
[2019-11-23 23:39:41,770 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdecb2f22/bba67c9f1e9c424484fed7696fbd6482
[2019-11-23 23:39:41,781 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 23:39:41,783 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 23:39:41,788 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:41,788 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 23:39:41,792 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 23:39:41,793 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:41" (1/1) ...
[2019-11-23 23:39:41,796 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48114539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:41, skipping insertion in model container
[2019-11-23 23:39:41,796 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:41" (1/1) ...
[2019-11-23 23:39:41,805 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 23:39:41,981 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 23:39:43,407 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:43,417 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 23:39:44,086 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:44,119 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 23:39:44,119 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44 WrapperNode
[2019-11-23 23:39:44,119 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:44,120 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:44,120 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 23:39:44,121 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 23:39:44,131 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,191 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,331 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:44,331 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 23:39:44,331 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 23:39:44,332 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 23:39:44,342 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,342 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,356 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,357 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,426 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,472 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,494 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (1/1) ...
[2019-11-23 23:39:44,517 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 23:39:44,517 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 23:39:44,518 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 23:39:44,518 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 23:39:44,519 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (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 23:39:44,599 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 23:39:44,601 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 23:39:49,670 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 23:39:49,671 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 23:39:49,673 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:49 BoogieIcfgContainer
[2019-11-23 23:39:49,673 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 23:39:49,674 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 23:39:49,675 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 23:39:49,679 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 23:39:49,679 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:39:41" (1/3) ...
[2019-11-23 23:39:49,680 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5557e88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:49, skipping insertion in model container
[2019-11-23 23:39:49,681 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:44" (2/3) ...
[2019-11-23 23:39:49,682 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5557e88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:49, skipping insertion in model container
[2019-11-23 23:39:49,682 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:49" (3/3) ...
[2019-11-23 23:39:49,684 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label44.c
[2019-11-23 23:39:49,695 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 23:39:49,704 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 23:39:49,717 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 23:39:49,761 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 23:39:49,762 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 23:39:49,762 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 23:39:49,762 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 23:39:49,762 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 23:39:49,762 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 23:39:49,762 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 23:39:49,762 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 23:39:49,799 INFO  L276                IsEmpty]: Start isEmpty. Operand 763 states.
[2019-11-23 23:39:50,339 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 756
[2019-11-23 23:39:50,340 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:50,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:50,342 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:50,349 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:50,350 INFO  L82        PathProgramCache]: Analyzing trace with hash -1870342918, now seen corresponding path program 1 times
[2019-11-23 23:39:50,360 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:50,361 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713230493]
[2019-11-23 23:39:50,361 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:50,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:55,051 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 23:39:55,052 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713230493]
[2019-11-23 23:39:55,053 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:55,053 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:55,055 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917833037]
[2019-11-23 23:39:55,062 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:39:55,063 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:55,077 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:39:55,077 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:55,080 INFO  L87              Difference]: Start difference. First operand 763 states. Second operand 5 states.
[2019-11-23 23:40:02,824 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:02,824 INFO  L93              Difference]: Finished difference Result 3049 states and 6058 transitions.
[2019-11-23 23:40:02,825 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-23 23:40:02,827 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 755
[2019-11-23 23:40:02,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:02,888 INFO  L225             Difference]: With dead ends: 3049
[2019-11-23 23:40:02,889 INFO  L226             Difference]: Without dead ends: 2279
[2019-11-23 23:40:02,902 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 14 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:02,938 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2279 states.
[2019-11-23 23:40:03,101 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277.
[2019-11-23 23:40:03,103 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2277 states.
[2019-11-23 23:40:03,117 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3393 transitions.
[2019-11-23 23:40:03,121 INFO  L78                 Accepts]: Start accepts. Automaton has 2277 states and 3393 transitions. Word has length 755
[2019-11-23 23:40:03,124 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:03,125 INFO  L462      AbstractCegarLoop]: Abstraction has 2277 states and 3393 transitions.
[2019-11-23 23:40:03,125 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-23 23:40:03,125 INFO  L276                IsEmpty]: Start isEmpty. Operand 2277 states and 3393 transitions.
[2019-11-23 23:40:03,168 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-23 23:40:03,168 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:03,169 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:03,170 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:03,170 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:03,171 INFO  L82        PathProgramCache]: Analyzing trace with hash 1630102643, now seen corresponding path program 1 times
[2019-11-23 23:40:03,171 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:03,172 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866571974]
[2019-11-23 23:40:03,172 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:03,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:03,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-11-23 23:40:03,763 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866571974]
[2019-11-23 23:40:03,763 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:03,764 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:40:03,764 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704907260]
[2019-11-23 23:40:03,767 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:03,768 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:03,768 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:03,769 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:40:03,769 INFO  L87              Difference]: Start difference. First operand 2277 states and 3393 transitions. Second operand 3 states.
[2019-11-23 23:40:07,876 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:07,877 INFO  L93              Difference]: Finished difference Result 5311 states and 8648 transitions.
[2019-11-23 23:40:07,877 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:07,877 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 775
[2019-11-23 23:40:07,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:07,896 INFO  L225             Difference]: With dead ends: 5311
[2019-11-23 23:40:07,896 INFO  L226             Difference]: Without dead ends: 3793
[2019-11-23 23:40:07,901 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 23:40:07,908 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3793 states.
[2019-11-23 23:40:08,009 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3793.
[2019-11-23 23:40:08,009 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3793 states.
[2019-11-23 23:40:08,031 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5354 transitions.
[2019-11-23 23:40:08,032 INFO  L78                 Accepts]: Start accepts. Automaton has 3793 states and 5354 transitions. Word has length 775
[2019-11-23 23:40:08,032 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:08,032 INFO  L462      AbstractCegarLoop]: Abstraction has 3793 states and 5354 transitions.
[2019-11-23 23:40:08,033 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:08,033 INFO  L276                IsEmpty]: Start isEmpty. Operand 3793 states and 5354 transitions.
[2019-11-23 23:40:08,067 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 778
[2019-11-23 23:40:08,067 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:08,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:08,068 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:08,069 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:08,069 INFO  L82        PathProgramCache]: Analyzing trace with hash 219448647, now seen corresponding path program 1 times
[2019-11-23 23:40:08,070 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:08,070 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985368458]
[2019-11-23 23:40:08,071 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:08,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:09,621 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2019-11-23 23:40:09,622 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985368458]
[2019-11-23 23:40:09,622 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714359342]
[2019-11-23 23:40:09,622 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 23:40:09,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:09,899 INFO  L255         TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:40:09,934 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:40:10,458 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2019-11-23 23:40:10,459 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:40:10,998 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2019-11-23 23:40:10,999 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:40:10,999 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:40:11,000 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165296752]
[2019-11-23 23:40:11,001 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:11,002 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:11,002 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:11,002 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:11,002 INFO  L87              Difference]: Start difference. First operand 3793 states and 5354 transitions. Second operand 3 states.
[2019-11-23 23:40:14,949 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:14,949 INFO  L93              Difference]: Finished difference Result 9859 states and 14531 transitions.
[2019-11-23 23:40:14,949 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:14,950 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 777
[2019-11-23 23:40:14,952 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:14,990 INFO  L225             Difference]: With dead ends: 9859
[2019-11-23 23:40:14,990 INFO  L226             Difference]: Without dead ends: 6825
[2019-11-23 23:40:14,998 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1551 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:15,007 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6825 states.
[2019-11-23 23:40:15,130 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 6067.
[2019-11-23 23:40:15,130 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6067 states.
[2019-11-23 23:40:15,142 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 8792 transitions.
[2019-11-23 23:40:15,142 INFO  L78                 Accepts]: Start accepts. Automaton has 6067 states and 8792 transitions. Word has length 777
[2019-11-23 23:40:15,143 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:15,144 INFO  L462      AbstractCegarLoop]: Abstraction has 6067 states and 8792 transitions.
[2019-11-23 23:40:15,144 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:15,144 INFO  L276                IsEmpty]: Start isEmpty. Operand 6067 states and 8792 transitions.
[2019-11-23 23:40:15,165 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 833
[2019-11-23 23:40:15,165 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:15,166 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:15,371 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:40:15,372 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:15,372 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:15,373 INFO  L82        PathProgramCache]: Analyzing trace with hash -1279984711, now seen corresponding path program 1 times
[2019-11-23 23:40:15,373 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:15,374 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094131672]
[2019-11-23 23:40:15,374 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:15,443 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:16,202 INFO  L134       CoverageAnalysis]: Checked inductivity of 125 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked.
[2019-11-23 23:40:16,202 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094131672]
[2019-11-23 23:40:16,203 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:16,203 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:40:16,203 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140467477]
[2019-11-23 23:40:16,205 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:40:16,205 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:16,205 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:40:16,206 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:16,206 INFO  L87              Difference]: Start difference. First operand 6067 states and 8792 transitions. Second operand 4 states.
[2019-11-23 23:40:22,151 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:22,152 INFO  L93              Difference]: Finished difference Result 15165 states and 22073 transitions.
[2019-11-23 23:40:22,158 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:22,158 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 832
[2019-11-23 23:40:22,158 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:22,202 INFO  L225             Difference]: With dead ends: 15165
[2019-11-23 23:40:22,202 INFO  L226             Difference]: Without dead ends: 9857
[2019-11-23 23:40:22,209 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 23:40:22,219 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9857 states.
[2019-11-23 23:40:22,363 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 9857.
[2019-11-23 23:40:22,364 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9857 states.
[2019-11-23 23:40:22,387 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 12666 transitions.
[2019-11-23 23:40:22,387 INFO  L78                 Accepts]: Start accepts. Automaton has 9857 states and 12666 transitions. Word has length 832
[2019-11-23 23:40:22,388 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:22,388 INFO  L462      AbstractCegarLoop]: Abstraction has 9857 states and 12666 transitions.
[2019-11-23 23:40:22,388 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:22,388 INFO  L276                IsEmpty]: Start isEmpty. Operand 9857 states and 12666 transitions.
[2019-11-23 23:40:22,421 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 867
[2019-11-23 23:40:22,421 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:22,422 INFO  L410         BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:22,422 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:22,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:22,423 INFO  L82        PathProgramCache]: Analyzing trace with hash 934221550, now seen corresponding path program 1 times
[2019-11-23 23:40:22,423 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:22,424 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796359520]
[2019-11-23 23:40:22,424 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:22,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:23,146 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-23 23:40:23,147 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796359520]
[2019-11-23 23:40:23,148 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:23,148 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:40:23,148 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285000020]
[2019-11-23 23:40:23,150 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:40:23,150 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:23,151 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:40:23,151 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:23,151 INFO  L87              Difference]: Start difference. First operand 9857 states and 12666 transitions. Second operand 4 states.
[2019-11-23 23:40:29,956 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:29,956 INFO  L93              Difference]: Finished difference Result 36389 states and 47537 transitions.
[2019-11-23 23:40:29,960 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:29,961 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 866
[2019-11-23 23:40:29,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:30,034 INFO  L225             Difference]: With dead ends: 36389
[2019-11-23 23:40:30,035 INFO  L226             Difference]: Without dead ends: 27291
[2019-11-23 23:40:30,048 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 23:40:30,079 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27291 states.
[2019-11-23 23:40:30,482 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27291 to 27291.
[2019-11-23 23:40:30,482 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27291 states.
[2019-11-23 23:40:30,531 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27291 states to 27291 states and 33344 transitions.
[2019-11-23 23:40:30,532 INFO  L78                 Accepts]: Start accepts. Automaton has 27291 states and 33344 transitions. Word has length 866
[2019-11-23 23:40:30,532 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:30,532 INFO  L462      AbstractCegarLoop]: Abstraction has 27291 states and 33344 transitions.
[2019-11-23 23:40:30,532 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:30,533 INFO  L276                IsEmpty]: Start isEmpty. Operand 27291 states and 33344 transitions.
[2019-11-23 23:40:30,600 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 885
[2019-11-23 23:40:30,600 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:30,601 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:30,602 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:30,602 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:30,603 INFO  L82        PathProgramCache]: Analyzing trace with hash 1844566310, now seen corresponding path program 1 times
[2019-11-23 23:40:30,603 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:30,603 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082083242]
[2019-11-23 23:40:30,604 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:30,671 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:31,302 INFO  L134       CoverageAnalysis]: Checked inductivity of 262 backedges. 154 proven. 4 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-23 23:40:31,303 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082083242]
[2019-11-23 23:40:31,303 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403171204]
[2019-11-23 23:40:31,303 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 23:40:31,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:31,608 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:40:31,626 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:40:32,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 262 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2019-11-23 23:40:32,310 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:40:33,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 262 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2019-11-23 23:40:33,031 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:40:33,032 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:40:33,032 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802773522]
[2019-11-23 23:40:33,034 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:33,034 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:33,035 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:33,044 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:33,044 INFO  L87              Difference]: Start difference. First operand 27291 states and 33344 transitions. Second operand 3 states.
[2019-11-23 23:40:37,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:37,251 INFO  L93              Difference]: Finished difference Result 78837 states and 96877 transitions.
[2019-11-23 23:40:37,252 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:37,252 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 884
[2019-11-23 23:40:37,252 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:37,324 INFO  L225             Difference]: With dead ends: 78837
[2019-11-23 23:40:37,324 INFO  L226             Difference]: Without dead ends: 52305
[2019-11-23 23:40:37,366 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1770 GetRequests, 1765 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:37,426 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52305 states.
[2019-11-23 23:40:38,052 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52305 to 49273.
[2019-11-23 23:40:38,053 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 49273 states.
[2019-11-23 23:40:38,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49273 states to 49273 states and 57828 transitions.
[2019-11-23 23:40:38,116 INFO  L78                 Accepts]: Start accepts. Automaton has 49273 states and 57828 transitions. Word has length 884
[2019-11-23 23:40:38,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:38,116 INFO  L462      AbstractCegarLoop]: Abstraction has 49273 states and 57828 transitions.
[2019-11-23 23:40:38,116 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:38,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 49273 states and 57828 transitions.
[2019-11-23 23:40:38,186 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1184
[2019-11-23 23:40:38,186 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:38,187 INFO  L410         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:38,401 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:40:38,401 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:38,401 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:38,402 INFO  L82        PathProgramCache]: Analyzing trace with hash 329771299, now seen corresponding path program 1 times
[2019-11-23 23:40:38,403 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:38,403 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516116364]
[2019-11-23 23:40:38,404 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:38,463 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:39,349 INFO  L134       CoverageAnalysis]: Checked inductivity of 946 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked.
[2019-11-23 23:40:39,349 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516116364]
[2019-11-23 23:40:39,350 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:39,350 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:40:39,350 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069821838]
[2019-11-23 23:40:39,351 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:40:39,352 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:39,352 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:40:39,352 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:39,352 INFO  L87              Difference]: Start difference. First operand 49273 states and 57828 transitions. Second operand 4 states.
[2019-11-23 23:40:46,048 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:46,049 INFO  L93              Difference]: Finished difference Result 150089 states and 177066 transitions.
[2019-11-23 23:40:46,049 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:46,049 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 1183
[2019-11-23 23:40:46,049 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:46,158 INFO  L225             Difference]: With dead ends: 150089
[2019-11-23 23:40:46,158 INFO  L226             Difference]: Without dead ends: 101575
[2019-11-23 23:40:46,216 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 23:40:46,320 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101575 states.
[2019-11-23 23:40:47,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101575 to 95511.
[2019-11-23 23:40:47,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 95511 states.
[2019-11-23 23:40:47,375 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 95511 states to 95511 states and 111010 transitions.
[2019-11-23 23:40:47,375 INFO  L78                 Accepts]: Start accepts. Automaton has 95511 states and 111010 transitions. Word has length 1183
[2019-11-23 23:40:47,376 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:47,376 INFO  L462      AbstractCegarLoop]: Abstraction has 95511 states and 111010 transitions.
[2019-11-23 23:40:47,376 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:47,376 INFO  L276                IsEmpty]: Start isEmpty. Operand 95511 states and 111010 transitions.
[2019-11-23 23:40:47,445 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1219
[2019-11-23 23:40:47,445 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:47,448 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:47,448 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:47,448 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:47,449 INFO  L82        PathProgramCache]: Analyzing trace with hash 614804696, now seen corresponding path program 1 times
[2019-11-23 23:40:47,449 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:47,450 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652247844]
[2019-11-23 23:40:47,450 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:47,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:51,748 INFO  L134       CoverageAnalysis]: Checked inductivity of 683 backedges. 499 proven. 4 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked.
[2019-11-23 23:40:51,748 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652247844]
[2019-11-23 23:40:51,748 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875583102]
[2019-11-23 23:40:51,749 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 23:40:52,122 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:52,126 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:40:52,136 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:40:52,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 683 backedges. 611 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2019-11-23 23:40:52,745 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:40:53,313 INFO  L134       CoverageAnalysis]: Checked inductivity of 683 backedges. 611 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2019-11-23 23:40:53,314 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:40:53,316 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8
[2019-11-23 23:40:53,318 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775816973]
[2019-11-23 23:40:53,320 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:53,320 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:53,322 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:53,323 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-11-23 23:40:53,323 INFO  L87              Difference]: Start difference. First operand 95511 states and 111010 transitions. Second operand 3 states.