/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 22:05:19,353 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 22:05:19,356 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 22:05:19,396 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 22:05:19,396 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 22:05:19,408 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 22:05:19,409 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 22:05:19,413 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 22:05:19,415 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 22:05:19,419 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 22:05:19,419 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 22:05:19,422 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 22:05:19,422 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 22:05:19,425 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 22:05:19,427 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 22:05:19,428 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 22:05:19,428 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 22:05:19,432 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 22:05:19,434 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 22:05:19,435 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 22:05:19,437 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 22:05:19,438 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 22:05:19,439 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 22:05:19,439 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 22:05:19,445 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 22:05:19,446 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 22:05:19,446 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 22:05:19,449 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 22:05:19,450 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 22:05:19,450 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 22:05:19,451 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 22:05:19,451 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 22:05:19,453 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 22:05:19,454 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 22:05:19,455 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 22:05:19,455 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 22:05:19,456 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 22:05:19,456 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 22:05:19,456 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 22:05:19,459 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 22:05:19,459 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-18 22:05:19,501 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 22:05:19,501 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 22:05:19,503 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 22:05:19,503 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 22:05:19,503 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 22:05:19,504 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 22:05:19,504 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 22:05:19,504 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 22:05:19,504 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 22:05:19,505 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 22:05:19,506 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 22:05:19,506 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 22:05:19,506 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 22:05:19,506 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 22:05:19,507 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 22:05:19,507 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 22:05:19,507 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 22:05:19,507 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 22:05:19,507 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 22:05:19,507 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 22:05:19,508 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 22:05:19,508 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 22:05:19,508 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 22:05:19,508 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 22:05:19,508 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 22:05:19,509 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 22:05:19,509 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 22:05:19,509 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 22:05:19,509 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 22:05:19,509 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST;
[2020-08-18 22:05:19,827 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 22:05:19,846 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 22:05:19,850 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 22:05:19,851 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 22:05:19,852 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 22:05:19,853 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 22:05:19,926 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae0d31b8a/49cccce26fba430d8a51ef89b1499796/FLAG9def8f611
[2020-08-18 22:05:20,494 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 22:05:20,495 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 22:05:20,512 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae0d31b8a/49cccce26fba430d8a51ef89b1499796/FLAG9def8f611
[2020-08-18 22:05:20,749 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae0d31b8a/49cccce26fba430d8a51ef89b1499796
[2020-08-18 22:05:20,759 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 22:05:20,760 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 22:05:20,761 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 22:05:20,762 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 22:05:20,765 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 22:05:20,766 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:05:20" (1/1) ...
[2020-08-18 22:05:20,769 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc8c9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:20, skipping insertion in model container
[2020-08-18 22:05:20,769 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:05:20" (1/1) ...
[2020-08-18 22:05:20,777 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 22:05:20,889 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 22:05:21,920 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 22:05:21,938 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 22:05:22,516 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 22:05:22,548 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 22:05:22,549 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22 WrapperNode
[2020-08-18 22:05:22,549 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 22:05:22,550 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 22:05:22,550 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 22:05:22,551 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 22:05:22,566 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,567 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,612 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,612 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,688 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,717 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,738 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
[2020-08-18 22:05:22,756 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 22:05:22,759 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 22:05:22,760 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 22:05:22,760 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 22:05:22,761 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-08-18 22:05:22,840 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 22:05:22,841 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 22:05:22,841 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 22:05:22,841 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 22:05:22,842 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 22:05:22,842 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 22:05:22,842 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 22:05:22,842 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 22:05:22,842 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 22:05:22,843 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 22:05:22,843 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 22:05:22,843 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 22:05:22,843 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 22:05:22,843 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 22:05:22,843 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 22:05:22,844 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 22:05:22,844 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 22:05:22,844 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 22:05:22,844 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 22:05:22,850 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 22:05:22,850 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 22:05:22,850 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 22:05:25,351 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 22:05:25,352 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 22:05:25,369 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:05:25 BoogieIcfgContainer
[2020-08-18 22:05:25,370 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 22:05:25,372 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 22:05:25,372 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 22:05:25,375 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 22:05:25,376 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:05:20" (1/3) ...
[2020-08-18 22:05:25,377 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de93bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:05:25, skipping insertion in model container
[2020-08-18 22:05:25,377 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:22" (2/3) ...
[2020-08-18 22:05:25,378 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de93bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:05:25, skipping insertion in model container
[2020-08-18 22:05:25,378 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:05:25" (3/3) ...
[2020-08-18 22:05:25,380 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 22:05:25,393 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 22:05:25,416 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 22:05:25,435 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 22:05:25,479 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 22:05:25,479 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 22:05:25,479 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 22:05:25,479 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 22:05:25,479 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 22:05:25,480 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 22:05:25,480 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 22:05:25,480 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 22:05:25,520 INFO  L276                IsEmpty]: Start isEmpty. Operand 796 states.
[2020-08-18 22:05:25,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 22:05:25,559 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:25,564 INFO  L422         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]
[2020-08-18 22:05:25,564 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:25,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:25,571 INFO  L82        PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times
[2020-08-18 22:05:25,580 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:25,581 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400747304]
[2020-08-18 22:05:25,581 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:26,257 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:27,420 WARN  L193               SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:27,424 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:27,438 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:27,623 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:27,624 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400747304]
[2020-08-18 22:05:27,626 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:27,627 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:27,627 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167604063]
[2020-08-18 22:05:27,633 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:27,634 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:27,645 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:27,646 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:27,648 INFO  L87              Difference]: Start difference. First operand 796 states. Second operand 4 states.
[2020-08-18 22:05:28,104 WARN  L193               SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:33,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:33,133 INFO  L93              Difference]: Finished difference Result 1515 states and 2659 transitions.
[2020-08-18 22:05:33,134 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:33,135 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 22:05:33,137 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:33,163 INFO  L225             Difference]: With dead ends: 1515
[2020-08-18 22:05:33,164 INFO  L226             Difference]: Without dead ends: 1299
[2020-08-18 22:05:33,169 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:33,191 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1299 states.
[2020-08-18 22:05:33,289 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297.
[2020-08-18 22:05:33,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1297 states.
[2020-08-18 22:05:33,297 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions.
[2020-08-18 22:05:33,299 INFO  L78                 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318
[2020-08-18 22:05:33,300 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:33,300 INFO  L479      AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions.
[2020-08-18 22:05:33,301 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:33,301 INFO  L276                IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions.
[2020-08-18 22:05:33,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 22:05:33,307 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:33,307 INFO  L422         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]
[2020-08-18 22:05:33,308 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 22:05:33,308 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:33,308 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:33,308 INFO  L82        PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times
[2020-08-18 22:05:33,309 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:33,309 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464925826]
[2020-08-18 22:05:33,309 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:33,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:34,108 WARN  L193               SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:34,110 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:34,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:34,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:34,356 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464925826]
[2020-08-18 22:05:34,357 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:34,357 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:34,357 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933570343]
[2020-08-18 22:05:34,362 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:34,363 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:34,363 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:34,364 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:34,364 INFO  L87              Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states.
[2020-08-18 22:05:35,018 WARN  L193               SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:39,571 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:39,572 INFO  L93              Difference]: Finished difference Result 2671 states and 4201 transitions.
[2020-08-18 22:05:39,575 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:39,575 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 22:05:39,576 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:39,590 INFO  L225             Difference]: With dead ends: 2671
[2020-08-18 22:05:39,590 INFO  L226             Difference]: Without dead ends: 2289
[2020-08-18 22:05:39,599 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:39,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2289 states.
[2020-08-18 22:05:39,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287.
[2020-08-18 22:05:39,674 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2287 states.
[2020-08-18 22:05:39,685 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions.
[2020-08-18 22:05:39,685 INFO  L78                 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318
[2020-08-18 22:05:39,686 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:39,686 INFO  L479      AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions.
[2020-08-18 22:05:39,686 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:39,687 INFO  L276                IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions.
[2020-08-18 22:05:39,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 22:05:39,694 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:39,695 INFO  L422         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]
[2020-08-18 22:05:39,695 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 22:05:39,695 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:39,696 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:39,696 INFO  L82        PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times
[2020-08-18 22:05:39,696 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:39,697 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005654409]
[2020-08-18 22:05:39,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:39,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:40,396 WARN  L193               SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:40,399 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:40,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:40,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:40,517 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005654409]
[2020-08-18 22:05:40,517 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:40,517 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:40,518 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257665132]
[2020-08-18 22:05:40,518 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:40,519 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:40,519 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:40,519 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:40,519 INFO  L87              Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states.
[2020-08-18 22:05:40,925 WARN  L193               SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:45,463 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:45,463 INFO  L93              Difference]: Finished difference Result 4943 states and 7762 transitions.
[2020-08-18 22:05:45,464 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:45,464 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 22:05:45,465 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:45,486 INFO  L225             Difference]: With dead ends: 4943
[2020-08-18 22:05:45,486 INFO  L226             Difference]: Without dead ends: 4229
[2020-08-18 22:05:45,489 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:45,495 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4229 states.
[2020-08-18 22:05:45,627 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227.
[2020-08-18 22:05:45,627 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4227 states.
[2020-08-18 22:05:45,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions.
[2020-08-18 22:05:45,643 INFO  L78                 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318
[2020-08-18 22:05:45,644 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:45,644 INFO  L479      AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions.
[2020-08-18 22:05:45,644 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:45,644 INFO  L276                IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions.
[2020-08-18 22:05:45,707 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 22:05:45,707 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:45,707 INFO  L422         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]
[2020-08-18 22:05:45,709 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 22:05:45,709 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:45,709 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:45,710 INFO  L82        PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times
[2020-08-18 22:05:45,710 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:45,710 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081903223]
[2020-08-18 22:05:45,711 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:45,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:46,489 WARN  L193               SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:46,491 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:46,495 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:46,616 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:46,617 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081903223]
[2020-08-18 22:05:46,618 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:46,618 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:46,618 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482949906]
[2020-08-18 22:05:46,619 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:46,619 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:46,619 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:46,620 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:46,620 INFO  L87              Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states.
[2020-08-18 22:05:47,036 WARN  L193               SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:50,971 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:50,972 INFO  L93              Difference]: Finished difference Result 9359 states and 14670 transitions.
[2020-08-18 22:05:50,972 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:50,973 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 22:05:50,974 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:51,010 INFO  L225             Difference]: With dead ends: 9359
[2020-08-18 22:05:51,010 INFO  L226             Difference]: Without dead ends: 8029
[2020-08-18 22:05:51,014 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:51,023 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8029 states.
[2020-08-18 22:05:51,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027.
[2020-08-18 22:05:51,209 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8027 states.
[2020-08-18 22:05:51,241 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions.
[2020-08-18 22:05:51,241 INFO  L78                 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318
[2020-08-18 22:05:51,243 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:51,243 INFO  L479      AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions.
[2020-08-18 22:05:51,243 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:51,243 INFO  L276                IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions.
[2020-08-18 22:05:51,266 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 22:05:51,267 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:51,267 INFO  L422         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]
[2020-08-18 22:05:51,268 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 22:05:51,268 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:51,269 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:51,269 INFO  L82        PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times
[2020-08-18 22:05:51,269 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:51,269 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904847833]
[2020-08-18 22:05:51,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:51,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:52,183 WARN  L193               SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:52,184 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:52,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:52,311 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:52,312 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904847833]
[2020-08-18 22:05:52,312 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:52,312 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 22:05:52,312 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024058357]
[2020-08-18 22:05:52,313 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 22:05:52,313 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:52,313 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 22:05:52,313 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:52,313 INFO  L87              Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states.
[2020-08-18 22:05:59,731 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:59,731 INFO  L93              Difference]: Finished difference Result 23754 states and 36777 transitions.
[2020-08-18 22:05:59,732 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:59,732 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 318
[2020-08-18 22:05:59,733 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:59,818 INFO  L225             Difference]: With dead ends: 23754
[2020-08-18 22:05:59,818 INFO  L226             Difference]: Without dead ends: 15742
[2020-08-18 22:05:59,843 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 22:05:59,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15742 states.
[2020-08-18 22:06:00,448 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740.
[2020-08-18 22:06:00,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15740 states.
[2020-08-18 22:06:00,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions.
[2020-08-18 22:06:00,474 INFO  L78                 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318
[2020-08-18 22:06:00,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:06:00,475 INFO  L479      AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions.
[2020-08-18 22:06:00,475 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 22:06:00,475 INFO  L276                IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions.
[2020-08-18 22:06:00,506 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-18 22:06:00,506 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:06:00,507 INFO  L422         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]
[2020-08-18 22:06:00,507 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 22:06:00,507 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:06:00,510 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:06:00,511 INFO  L82        PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times
[2020-08-18 22:06:00,511 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:06:00,512 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197708222]
[2020-08-18 22:06:00,512 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:06:00,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:01,096 WARN  L193               SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:06:01,097 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:06:01,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:01,224 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:06:01,225 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197708222]
[2020-08-18 22:06:01,225 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:06:01,225 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:06:01,225 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600575448]
[2020-08-18 22:06:01,226 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:06:01,226 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:06:01,226 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:06:01,227 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:01,227 INFO  L87              Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states.
[2020-08-18 22:06:09,619 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:06:09,620 INFO  L93              Difference]: Finished difference Result 46481 states and 71518 transitions.
[2020-08-18 22:06:09,620 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 22:06:09,620 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 320
[2020-08-18 22:06:09,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:06:09,692 INFO  L225             Difference]: With dead ends: 46481
[2020-08-18 22:06:09,692 INFO  L226             Difference]: Without dead ends: 30870
[2020-08-18 22:06:09,729 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:09,770 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30870 states.
[2020-08-18 22:06:11,471 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868.
[2020-08-18 22:06:11,471 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30868 states.
[2020-08-18 22:06:11,523 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions.
[2020-08-18 22:06:11,523 INFO  L78                 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320
[2020-08-18 22:06:11,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:06:11,524 INFO  L479      AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions.
[2020-08-18 22:06:11,524 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:06:11,524 INFO  L276                IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions.
[2020-08-18 22:06:11,581 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-18 22:06:11,581 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:06:11,581 INFO  L422         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]
[2020-08-18 22:06:11,582 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 22:06:11,582 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:06:11,582 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:06:11,582 INFO  L82        PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times
[2020-08-18 22:06:11,582 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:06:11,583 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340647362]
[2020-08-18 22:06:11,583 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:06:11,625 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:12,078 WARN  L193               SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:06:12,080 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:06:12,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:12,167 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:06:12,167 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340647362]
[2020-08-18 22:06:12,168 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:06:12,168 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:06:12,168 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727001351]
[2020-08-18 22:06:12,169 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:06:12,169 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:06:12,170 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:06:12,170 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:12,170 INFO  L87              Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states.