java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 19:45:11,522 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 19:45:11,525 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 19:45:11,543 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 19:45:11,543 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 19:45:11,545 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 19:45:11,547 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 19:45:11,556 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 19:45:11,560 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 19:45:11,563 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-13 19:45:11,566 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-13 19:45:11,568 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-13 19:45:11,568 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 19:45:11,570 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 19:45:11,573 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 19:45:11,574 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 19:45:11,576 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 19:45:11,576 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 19:45:11,578 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 19:45:11,584 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 19:45:11,588 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 19:45:11,591 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 19:45:11,595 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 19:45:11,595 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 19:45:11,597 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 19:45:11,598 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 19:45:11,598 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-13 19:45:11,600 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-13 19:45:11,601 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-10-13 19:45:11,603 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-13 19:45:11,604 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-13 19:45:11,604 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-10-13 19:45:11,605 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-13 19:45:11,606 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-13 19:45:11,608 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-13 19:45:11,608 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-10-13 19:45:11,609 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-10-13 19:45:11,609 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-10-13 19:45:11,609 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-10-13 19:45:11,610 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-10-13 19:45:11,611 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 19:45:11,612 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
[2019-10-13 19:45:11,636 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 19:45:11,637 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 19:45:11,638 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 19:45:11,638 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 19:45:11,639 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 19:45:11,640 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 19:45:11,640 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 19:45:11,640 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 19:45:11,640 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 19:45:11,640 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 19:45:11,641 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 19:45:11,641 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 19:45:11,641 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 19:45:11,642 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 19:45:11,643 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 19:45:11,643 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 19:45:11,643 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 19:45:11,643 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 19:45:11,644 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 19:45:11,644 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 19:45:11,644 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 19:45:11,644 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 19:45:11,645 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 19:45:11,646 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 19:45:11,646 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 19:45:11,646 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 19:45:11,647 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 19:45:11,647 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 19:45:11,647 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 19:45:11,936 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 19:45:11,949 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 19:45:11,953 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 19:45:11,954 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 19:45:11,955 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 19:45:11,955 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2019-10-13 19:45:12,038 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d189a850/f4294a6f362b4b89bb5ca99de88a169c/FLAG5278c87a7
[2019-10-13 19:45:12,536 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 19:45:12,537 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2019-10-13 19:45:12,551 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d189a850/f4294a6f362b4b89bb5ca99de88a169c/FLAG5278c87a7
[2019-10-13 19:45:12,872 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d189a850/f4294a6f362b4b89bb5ca99de88a169c
[2019-10-13 19:45:12,883 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 19:45:12,884 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 19:45:12,885 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 19:45:12,885 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 19:45:12,888 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 19:45:12,889 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:12" (1/1) ...
[2019-10-13 19:45:12,891 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f0596f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:12, skipping insertion in model container
[2019-10-13 19:45:12,892 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:12" (1/1) ...
[2019-10-13 19:45:12,900 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 19:45:12,984 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 19:45:13,522 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 19:45:13,534 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 19:45:13,700 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 19:45:13,719 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 19:45:13,719 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13 WrapperNode
[2019-10-13 19:45:13,720 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 19:45:13,720 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 19:45:13,720 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 19:45:13,721 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 19:45:13,733 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,733 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,749 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,749 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,774 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,795 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,799 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (1/1) ...
[2019-10-13 19:45:13,806 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 19:45:13,807 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 19:45:13,807 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 19:45:13,807 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 19:45:13,808 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (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
[2019-10-13 19:45:13,893 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 19:45:13,894 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 19:45:13,894 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 19:45:13,895 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 19:45:13,895 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2019-10-13 19:45:13,896 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2019-10-13 19:45:13,896 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2019-10-13 19:45:13,896 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2019-10-13 19:45:13,896 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-10-13 19:45:13,896 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2019-10-13 19:45:13,897 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2019-10-13 19:45:13,897 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2019-10-13 19:45:13,897 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2019-10-13 19:45:13,898 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2019-10-13 19:45:13,899 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2019-10-13 19:45:13,899 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2019-10-13 19:45:13,902 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 19:45:13,903 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 19:45:13,903 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 19:45:15,407 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 19:45:15,407 INFO  L284             CfgBuilder]: Removed 0 assume(true) statements.
[2019-10-13 19:45:15,409 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:15 BoogieIcfgContainer
[2019-10-13 19:45:15,409 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 19:45:15,410 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 19:45:15,411 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 19:45:15,414 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 19:45:15,415 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:45:12" (1/3) ...
[2019-10-13 19:45:15,416 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39af653d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:15, skipping insertion in model container
[2019-10-13 19:45:15,416 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:13" (2/3) ...
[2019-10-13 19:45:15,416 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39af653d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:15, skipping insertion in model container
[2019-10-13 19:45:15,416 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:15" (3/3) ...
[2019-10-13 19:45:15,418 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2019-10-13 19:45:15,430 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 19:45:15,441 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 19:45:15,452 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 19:45:15,481 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 19:45:15,482 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 19:45:15,482 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 19:45:15,482 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 19:45:15,482 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 19:45:15,482 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 19:45:15,483 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 19:45:15,483 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 19:45:15,509 INFO  L276                IsEmpty]: Start isEmpty. Operand 306 states.
[2019-10-13 19:45:15,525 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 148
[2019-10-13 19:45:15,525 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:15,527 INFO  L380         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]
[2019-10-13 19:45:15,529 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:15,534 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:15,535 INFO  L82        PathProgramCache]: Analyzing trace with hash 1464169863, now seen corresponding path program 1 times
[2019-10-13 19:45:15,544 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:15,545 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664775442]
[2019-10-13 19:45:15,545 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:15,546 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:15,546 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:15,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:16,461 WARN  L191               SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:16,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:16,569 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:16,569 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664775442]
[2019-10-13 19:45:16,571 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:16,571 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:16,572 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957483408]
[2019-10-13 19:45:16,579 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:16,579 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:16,596 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:16,597 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:16,600 INFO  L87              Difference]: Start difference. First operand 306 states. Second operand 4 states.
[2019-10-13 19:45:16,886 WARN  L191               SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 167
[2019-10-13 19:45:18,544 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:18,544 INFO  L93              Difference]: Finished difference Result 619 states and 1086 transitions.
[2019-10-13 19:45:18,545 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:18,547 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 147
[2019-10-13 19:45:18,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:18,568 INFO  L225             Difference]: With dead ends: 619
[2019-10-13 19:45:18,568 INFO  L226             Difference]: Without dead ends: 492
[2019-10-13 19:45:18,574 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:18,600 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 492 states.
[2019-10-13 19:45:18,661 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490.
[2019-10-13 19:45:18,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 490 states.
[2019-10-13 19:45:18,666 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 727 transitions.
[2019-10-13 19:45:18,668 INFO  L78                 Accepts]: Start accepts. Automaton has 490 states and 727 transitions. Word has length 147
[2019-10-13 19:45:18,669 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:18,669 INFO  L462      AbstractCegarLoop]: Abstraction has 490 states and 727 transitions.
[2019-10-13 19:45:18,669 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:18,669 INFO  L276                IsEmpty]: Start isEmpty. Operand 490 states and 727 transitions.
[2019-10-13 19:45:18,674 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 148
[2019-10-13 19:45:18,674 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:18,674 INFO  L380         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]
[2019-10-13 19:45:18,675 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:18,675 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:18,675 INFO  L82        PathProgramCache]: Analyzing trace with hash 558735771, now seen corresponding path program 1 times
[2019-10-13 19:45:18,675 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:18,676 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85678732]
[2019-10-13 19:45:18,676 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:18,676 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:18,676 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:18,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:19,065 WARN  L191               SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:19,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:19,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:19,115 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85678732]
[2019-10-13 19:45:19,115 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:19,116 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:19,116 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400142412]
[2019-10-13 19:45:19,118 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:19,119 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:19,119 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:19,119 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:19,119 INFO  L87              Difference]: Start difference. First operand 490 states and 727 transitions. Second operand 4 states.
[2019-10-13 19:45:19,355 WARN  L191               SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 167
[2019-10-13 19:45:20,602 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:20,603 INFO  L93              Difference]: Finished difference Result 1032 states and 1578 transitions.
[2019-10-13 19:45:20,603 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:20,603 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 147
[2019-10-13 19:45:20,604 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:20,609 INFO  L225             Difference]: With dead ends: 1032
[2019-10-13 19:45:20,610 INFO  L226             Difference]: Without dead ends: 840
[2019-10-13 19:45:20,613 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:20,615 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 840 states.
[2019-10-13 19:45:20,685 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838.
[2019-10-13 19:45:20,685 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 838 states.
[2019-10-13 19:45:20,690 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1255 transitions.
[2019-10-13 19:45:20,690 INFO  L78                 Accepts]: Start accepts. Automaton has 838 states and 1255 transitions. Word has length 147
[2019-10-13 19:45:20,691 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:20,691 INFO  L462      AbstractCegarLoop]: Abstraction has 838 states and 1255 transitions.
[2019-10-13 19:45:20,691 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:20,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 838 states and 1255 transitions.
[2019-10-13 19:45:20,696 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 148
[2019-10-13 19:45:20,697 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:20,697 INFO  L380         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]
[2019-10-13 19:45:20,698 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:20,699 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:20,699 INFO  L82        PathProgramCache]: Analyzing trace with hash 1754446721, now seen corresponding path program 1 times
[2019-10-13 19:45:20,700 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:20,700 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057770671]
[2019-10-13 19:45:20,700 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:20,700 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:20,700 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:20,945 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:21,382 WARN  L191               SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:21,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:21,457 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:21,459 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057770671]
[2019-10-13 19:45:21,468 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:21,468 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:21,468 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481642410]
[2019-10-13 19:45:21,470 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:21,470 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:21,470 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:21,471 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:21,471 INFO  L87              Difference]: Start difference. First operand 838 states and 1255 transitions. Second operand 5 states.
[2019-10-13 19:45:23,834 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:23,835 INFO  L93              Difference]: Finished difference Result 2461 states and 3682 transitions.
[2019-10-13 19:45:23,835 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:23,835 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 147
[2019-10-13 19:45:23,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:23,844 INFO  L225             Difference]: With dead ends: 2461
[2019-10-13 19:45:23,844 INFO  L226             Difference]: Without dead ends: 1636
[2019-10-13 19:45:23,847 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:23,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1636 states.
[2019-10-13 19:45:23,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1634.
[2019-10-13 19:45:23,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1634 states.
[2019-10-13 19:45:23,928 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2428 transitions.
[2019-10-13 19:45:23,928 INFO  L78                 Accepts]: Start accepts. Automaton has 1634 states and 2428 transitions. Word has length 147
[2019-10-13 19:45:23,928 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:23,929 INFO  L462      AbstractCegarLoop]: Abstraction has 1634 states and 2428 transitions.
[2019-10-13 19:45:23,929 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:23,929 INFO  L276                IsEmpty]: Start isEmpty. Operand 1634 states and 2428 transitions.
[2019-10-13 19:45:23,932 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2019-10-13 19:45:23,933 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:23,933 INFO  L380         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]
[2019-10-13 19:45:23,934 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:23,934 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:23,934 INFO  L82        PathProgramCache]: Analyzing trace with hash 818598479, now seen corresponding path program 1 times
[2019-10-13 19:45:23,934 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:23,935 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527791138]
[2019-10-13 19:45:23,935 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:23,935 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:23,935 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:23,953 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:24,207 WARN  L191               SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:24,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:24,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:24,250 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527791138]
[2019-10-13 19:45:24,251 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:24,251 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:24,252 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700671545]
[2019-10-13 19:45:24,253 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:24,253 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:24,253 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:24,254 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:24,254 INFO  L87              Difference]: Start difference. First operand 1634 states and 2428 transitions. Second operand 4 states.
[2019-10-13 19:45:25,712 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:25,713 INFO  L93              Difference]: Finished difference Result 4856 states and 7214 transitions.
[2019-10-13 19:45:25,713 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:45:25,713 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 148
[2019-10-13 19:45:25,714 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:25,734 INFO  L225             Difference]: With dead ends: 4856
[2019-10-13 19:45:25,734 INFO  L226             Difference]: Without dead ends: 3254
[2019-10-13 19:45:25,740 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:25,746 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3254 states.
[2019-10-13 19:45:25,837 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 1636.
[2019-10-13 19:45:25,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1636 states.
[2019-10-13 19:45:25,844 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2430 transitions.
[2019-10-13 19:45:25,844 INFO  L78                 Accepts]: Start accepts. Automaton has 1636 states and 2430 transitions. Word has length 148
[2019-10-13 19:45:25,844 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:25,844 INFO  L462      AbstractCegarLoop]: Abstraction has 1636 states and 2430 transitions.
[2019-10-13 19:45:25,845 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:25,845 INFO  L276                IsEmpty]: Start isEmpty. Operand 1636 states and 2430 transitions.
[2019-10-13 19:45:25,848 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 150
[2019-10-13 19:45:25,848 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:25,849 INFO  L380         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]
[2019-10-13 19:45:25,849 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:25,849 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:25,849 INFO  L82        PathProgramCache]: Analyzing trace with hash -77658400, now seen corresponding path program 1 times
[2019-10-13 19:45:25,850 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:25,850 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871929847]
[2019-10-13 19:45:25,850 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:25,850 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:25,850 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:25,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:26,198 WARN  L191               SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:26,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:26,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:26,265 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871929847]
[2019-10-13 19:45:26,265 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:26,265 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:26,265 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342446145]
[2019-10-13 19:45:26,266 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:26,266 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:26,266 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:26,267 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:26,267 INFO  L87              Difference]: Start difference. First operand 1636 states and 2430 transitions. Second operand 5 states.
[2019-10-13 19:45:27,498 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:27,499 INFO  L93              Difference]: Finished difference Result 3258 states and 4842 transitions.
[2019-10-13 19:45:27,499 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:27,499 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 149
[2019-10-13 19:45:27,499 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:27,508 INFO  L225             Difference]: With dead ends: 3258
[2019-10-13 19:45:27,508 INFO  L226             Difference]: Without dead ends: 1634
[2019-10-13 19:45:27,513 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:27,516 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1634 states.
[2019-10-13 19:45:27,579 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1634.
[2019-10-13 19:45:27,579 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1634 states.
[2019-10-13 19:45:27,584 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2426 transitions.
[2019-10-13 19:45:27,585 INFO  L78                 Accepts]: Start accepts. Automaton has 1634 states and 2426 transitions. Word has length 149
[2019-10-13 19:45:27,586 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:27,586 INFO  L462      AbstractCegarLoop]: Abstraction has 1634 states and 2426 transitions.
[2019-10-13 19:45:27,586 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:27,586 INFO  L276                IsEmpty]: Start isEmpty. Operand 1634 states and 2426 transitions.
[2019-10-13 19:45:27,589 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 150
[2019-10-13 19:45:27,589 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:27,590 INFO  L380         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]
[2019-10-13 19:45:27,590 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:27,590 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:27,590 INFO  L82        PathProgramCache]: Analyzing trace with hash -381277494, now seen corresponding path program 1 times
[2019-10-13 19:45:27,591 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:27,591 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778260734]
[2019-10-13 19:45:27,591 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:27,591 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:27,591 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:27,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:27,894 WARN  L191               SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:27,899 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:27,980 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:27,980 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778260734]
[2019-10-13 19:45:27,982 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:27,986 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:27,986 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401021617]
[2019-10-13 19:45:27,986 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:27,987 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:27,988 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:27,988 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:27,988 INFO  L87              Difference]: Start difference. First operand 1634 states and 2426 transitions. Second operand 4 states.
[2019-10-13 19:45:30,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:30,147 INFO  L93              Difference]: Finished difference Result 3870 states and 5761 transitions.
[2019-10-13 19:45:30,148 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:45:30,148 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 149
[2019-10-13 19:45:30,148 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:30,160 INFO  L225             Difference]: With dead ends: 3870
[2019-10-13 19:45:30,160 INFO  L226             Difference]: Without dead ends: 2414
[2019-10-13 19:45:30,163 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:30,166 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2414 states.
[2019-10-13 19:45:30,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412.
[2019-10-13 19:45:30,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2412 states.
[2019-10-13 19:45:30,258 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3535 transitions.
[2019-10-13 19:45:30,258 INFO  L78                 Accepts]: Start accepts. Automaton has 2412 states and 3535 transitions. Word has length 149
[2019-10-13 19:45:30,258 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:30,258 INFO  L462      AbstractCegarLoop]: Abstraction has 2412 states and 3535 transitions.
[2019-10-13 19:45:30,259 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:30,259 INFO  L276                IsEmpty]: Start isEmpty. Operand 2412 states and 3535 transitions.
[2019-10-13 19:45:30,263 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 153
[2019-10-13 19:45:30,263 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:30,263 INFO  L380         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]
[2019-10-13 19:45:30,263 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:30,264 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:30,264 INFO  L82        PathProgramCache]: Analyzing trace with hash -1397721559, now seen corresponding path program 1 times
[2019-10-13 19:45:30,264 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:30,264 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720199092]
[2019-10-13 19:45:30,264 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:30,265 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:30,265 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:30,310 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:30,581 WARN  L191               SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:30,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:30,623 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:30,624 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720199092]
[2019-10-13 19:45:30,624 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:30,624 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:30,624 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977334575]
[2019-10-13 19:45:30,625 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 19:45:30,625 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:30,625 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 19:45:30,626 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:30,626 INFO  L87              Difference]: Start difference. First operand 2412 states and 3535 transitions. Second operand 6 states.
[2019-10-13 19:45:30,860 WARN  L191               SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 172
[2019-10-13 19:45:32,250 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:32,250 INFO  L93              Difference]: Finished difference Result 4658 states and 6855 transitions.
[2019-10-13 19:45:32,250 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 19:45:32,251 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 152
[2019-10-13 19:45:32,251 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:32,262 INFO  L225             Difference]: With dead ends: 4658
[2019-10-13 19:45:32,263 INFO  L226             Difference]: Without dead ends: 2414
[2019-10-13 19:45:32,268 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2019-10-13 19:45:32,270 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2414 states.
[2019-10-13 19:45:32,367 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412.
[2019-10-13 19:45:32,367 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2412 states.
[2019-10-13 19:45:32,374 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3520 transitions.
[2019-10-13 19:45:32,374 INFO  L78                 Accepts]: Start accepts. Automaton has 2412 states and 3520 transitions. Word has length 152
[2019-10-13 19:45:32,374 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:32,374 INFO  L462      AbstractCegarLoop]: Abstraction has 2412 states and 3520 transitions.
[2019-10-13 19:45:32,375 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 19:45:32,375 INFO  L276                IsEmpty]: Start isEmpty. Operand 2412 states and 3520 transitions.
[2019-10-13 19:45:32,379 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 153
[2019-10-13 19:45:32,380 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:32,380 INFO  L380         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]
[2019-10-13 19:45:32,380 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:32,381 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:32,381 INFO  L82        PathProgramCache]: Analyzing trace with hash -1633318332, now seen corresponding path program 1 times
[2019-10-13 19:45:32,381 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:32,382 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426111235]
[2019-10-13 19:45:32,382 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:32,382 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:32,382 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:32,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:32,757 WARN  L191               SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:32,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:32,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:32,796 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426111235]
[2019-10-13 19:45:32,797 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:32,797 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:32,798 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036770731]
[2019-10-13 19:45:32,798 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:32,798 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:32,799 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:32,799 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:32,799 INFO  L87              Difference]: Start difference. First operand 2412 states and 3520 transitions. Second operand 5 states.
[2019-10-13 19:45:34,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:34,823 INFO  L93              Difference]: Finished difference Result 6242 states and 9103 transitions.
[2019-10-13 19:45:34,823 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:34,823 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 152
[2019-10-13 19:45:34,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:34,840 INFO  L225             Difference]: With dead ends: 6242
[2019-10-13 19:45:34,840 INFO  L226             Difference]: Without dead ends: 3853
[2019-10-13 19:45:34,847 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:34,852 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3853 states.
[2019-10-13 19:45:35,007 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3851.
[2019-10-13 19:45:35,007 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3851 states.
[2019-10-13 19:45:35,017 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5567 transitions.
[2019-10-13 19:45:35,017 INFO  L78                 Accepts]: Start accepts. Automaton has 3851 states and 5567 transitions. Word has length 152
[2019-10-13 19:45:35,017 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:35,018 INFO  L462      AbstractCegarLoop]: Abstraction has 3851 states and 5567 transitions.
[2019-10-13 19:45:35,018 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:35,018 INFO  L276                IsEmpty]: Start isEmpty. Operand 3851 states and 5567 transitions.
[2019-10-13 19:45:35,025 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 155
[2019-10-13 19:45:35,025 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:35,026 INFO  L380         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]
[2019-10-13 19:45:35,026 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:35,026 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:35,027 INFO  L82        PathProgramCache]: Analyzing trace with hash -83620211, now seen corresponding path program 1 times
[2019-10-13 19:45:35,027 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:35,027 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522526009]
[2019-10-13 19:45:35,028 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:35,028 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:35,028 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:35,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:35,351 WARN  L191               SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:35,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:35,390 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:35,391 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522526009]
[2019-10-13 19:45:35,391 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:35,391 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:35,391 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996755442]
[2019-10-13 19:45:35,392 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:35,392 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:35,392 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:35,393 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:35,393 INFO  L87              Difference]: Start difference. First operand 3851 states and 5567 transitions. Second operand 4 states.
[2019-10-13 19:45:37,580 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:37,580 INFO  L93              Difference]: Finished difference Result 10239 states and 14831 transitions.
[2019-10-13 19:45:37,581 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:45:37,581 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 154
[2019-10-13 19:45:37,581 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:37,601 INFO  L225             Difference]: With dead ends: 10239
[2019-10-13 19:45:37,601 INFO  L226             Difference]: Without dead ends: 6731
[2019-10-13 19:45:37,608 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:37,616 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6731 states.
[2019-10-13 19:45:37,879 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 6729.
[2019-10-13 19:45:37,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6729 states.
[2019-10-13 19:45:37,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 9603 transitions.
[2019-10-13 19:45:37,892 INFO  L78                 Accepts]: Start accepts. Automaton has 6729 states and 9603 transitions. Word has length 154
[2019-10-13 19:45:37,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:37,892 INFO  L462      AbstractCegarLoop]: Abstraction has 6729 states and 9603 transitions.
[2019-10-13 19:45:37,892 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:37,892 INFO  L276                IsEmpty]: Start isEmpty. Operand 6729 states and 9603 transitions.
[2019-10-13 19:45:37,901 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 155
[2019-10-13 19:45:37,901 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:37,902 INFO  L380         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]
[2019-10-13 19:45:37,902 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:37,902 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:37,902 INFO  L82        PathProgramCache]: Analyzing trace with hash 423811114, now seen corresponding path program 1 times
[2019-10-13 19:45:37,903 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:37,903 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424770306]
[2019-10-13 19:45:37,903 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:37,903 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:37,903 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:37,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:38,174 WARN  L191               SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:38,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:38,210 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:38,210 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424770306]
[2019-10-13 19:45:38,210 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:38,211 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:38,211 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489954941]
[2019-10-13 19:45:38,211 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:38,212 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:38,212 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:38,212 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:38,212 INFO  L87              Difference]: Start difference. First operand 6729 states and 9603 transitions. Second operand 5 states.
[2019-10-13 19:45:39,429 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:39,429 INFO  L93              Difference]: Finished difference Result 11002 states and 15732 transitions.
[2019-10-13 19:45:39,430 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:39,430 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 154
[2019-10-13 19:45:39,430 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:39,451 INFO  L225             Difference]: With dead ends: 11002
[2019-10-13 19:45:39,451 INFO  L226             Difference]: Without dead ends: 5964
[2019-10-13 19:45:39,460 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:39,467 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5964 states.
[2019-10-13 19:45:39,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 5964.
[2019-10-13 19:45:39,679 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5964 states.
[2019-10-13 19:45:39,686 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 8508 transitions.
[2019-10-13 19:45:39,686 INFO  L78                 Accepts]: Start accepts. Automaton has 5964 states and 8508 transitions. Word has length 154
[2019-10-13 19:45:39,686 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:39,686 INFO  L462      AbstractCegarLoop]: Abstraction has 5964 states and 8508 transitions.
[2019-10-13 19:45:39,686 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:39,687 INFO  L276                IsEmpty]: Start isEmpty. Operand 5964 states and 8508 transitions.
[2019-10-13 19:45:39,695 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 158
[2019-10-13 19:45:39,695 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:39,695 INFO  L380         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]
[2019-10-13 19:45:39,696 INFO  L410      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:39,696 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:39,696 INFO  L82        PathProgramCache]: Analyzing trace with hash 923876710, now seen corresponding path program 1 times
[2019-10-13 19:45:39,696 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:39,696 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711237877]
[2019-10-13 19:45:39,697 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:39,697 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:39,697 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:39,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:40,077 WARN  L191               SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:40,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:40,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:40,120 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711237877]
[2019-10-13 19:45:40,120 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:40,120 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:40,120 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762360910]
[2019-10-13 19:45:40,121 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:40,121 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:40,121 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:40,122 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:40,122 INFO  L87              Difference]: Start difference. First operand 5964 states and 8508 transitions. Second operand 5 states.
[2019-10-13 19:45:42,308 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:42,308 INFO  L93              Difference]: Finished difference Result 17410 states and 24777 transitions.
[2019-10-13 19:45:42,311 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:42,312 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 157
[2019-10-13 19:45:42,312 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:42,333 INFO  L225             Difference]: With dead ends: 17410
[2019-10-13 19:45:42,334 INFO  L226             Difference]: Without dead ends: 11489
[2019-10-13 19:45:42,343 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:42,355 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11489 states.
[2019-10-13 19:45:42,775 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 11487.
[2019-10-13 19:45:42,776 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11487 states.
[2019-10-13 19:45:42,788 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11487 states to 11487 states and 16184 transitions.
[2019-10-13 19:45:42,789 INFO  L78                 Accepts]: Start accepts. Automaton has 11487 states and 16184 transitions. Word has length 157
[2019-10-13 19:45:42,789 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:42,789 INFO  L462      AbstractCegarLoop]: Abstraction has 11487 states and 16184 transitions.
[2019-10-13 19:45:42,789 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:42,789 INFO  L276                IsEmpty]: Start isEmpty. Operand 11487 states and 16184 transitions.
[2019-10-13 19:45:42,802 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 159
[2019-10-13 19:45:42,802 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:42,803 INFO  L380         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]
[2019-10-13 19:45:42,803 INFO  L410      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:42,803 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:42,803 INFO  L82        PathProgramCache]: Analyzing trace with hash -2109819854, now seen corresponding path program 1 times
[2019-10-13 19:45:42,803 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:42,804 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131977606]
[2019-10-13 19:45:42,804 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:42,804 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:42,804 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:42,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:43,024 WARN  L191               SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:43,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:43,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:43,052 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131977606]
[2019-10-13 19:45:43,053 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:43,053 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:43,053 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822944851]
[2019-10-13 19:45:43,053 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:43,054 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:43,054 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:43,054 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:43,054 INFO  L87              Difference]: Start difference. First operand 11487 states and 16184 transitions. Second operand 4 states.
[2019-10-13 19:45:45,672 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:45,673 INFO  L93              Difference]: Finished difference Result 34269 states and 48305 transitions.
[2019-10-13 19:45:45,673 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:45:45,673 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 158
[2019-10-13 19:45:45,673 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:45,715 INFO  L225             Difference]: With dead ends: 34269
[2019-10-13 19:45:45,715 INFO  L226             Difference]: Without dead ends: 22887
[2019-10-13 19:45:45,735 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:45,760 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22887 states.
[2019-10-13 19:45:46,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22887 to 11493.
[2019-10-13 19:45:46,252 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11493 states.
[2019-10-13 19:45:46,264 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11493 states to 11493 states and 16190 transitions.
[2019-10-13 19:45:46,265 INFO  L78                 Accepts]: Start accepts. Automaton has 11493 states and 16190 transitions. Word has length 158
[2019-10-13 19:45:46,265 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:46,265 INFO  L462      AbstractCegarLoop]: Abstraction has 11493 states and 16190 transitions.
[2019-10-13 19:45:46,265 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:46,265 INFO  L276                IsEmpty]: Start isEmpty. Operand 11493 states and 16190 transitions.
[2019-10-13 19:45:46,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 160
[2019-10-13 19:45:46,277 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:46,277 INFO  L380         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]
[2019-10-13 19:45:46,277 INFO  L410      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:46,277 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:46,278 INFO  L82        PathProgramCache]: Analyzing trace with hash 1177749259, now seen corresponding path program 1 times
[2019-10-13 19:45:46,278 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:46,278 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936556127]
[2019-10-13 19:45:46,278 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:46,278 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:46,279 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:46,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:46,662 WARN  L191               SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2019-10-13 19:45:46,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:46,730 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 19:45:46,731 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936556127]
[2019-10-13 19:45:46,731 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:46,732 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:46,732 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612404318]
[2019-10-13 19:45:46,733 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:46,733 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:46,733 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:46,734 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:46,734 INFO  L87              Difference]: Start difference. First operand 11493 states and 16190 transitions. Second operand 4 states.