/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 11:30:38,437 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 11:30:38,440 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 11:30:38,483 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 11:30:38,483 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 11:30:38,493 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 11:30:38,496 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 11:30:38,499 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-08-18 11:30:38,505 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-08-18 11:30:38,507 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 11:30:38,510 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 11:30:38,512 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 11:30:38,513 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 11:30:38,515 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 11:30:38,515 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 11:30:38,517 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 11:30:38,525 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 11:30:38,527 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 11:30:38,528 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 11:30:38,529 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 11:30:38,530 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 11:30:38,542 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 11:30:38,542 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 11:30:38,542 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 11:30:38,543 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 11:30:38,544 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 11:30:38,544 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 11:30:38,545 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 11:30:38,545 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 11:30:38,546 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 11:30:38,547 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 11:30:38,547 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 11:30:38,548 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-18 11:30:38,549 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 11:30:38,550 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 11:30:38,551 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 11:30:38,571 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 11:30:38,572 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 11:30:38,573 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 11:30:38,573 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 11:30:38,574 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 11:30:38,574 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 11:30:38,574 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 11:30:38,574 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 11:30:38,574 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 11:30:38,575 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 11:30:38,575 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 11:30:38,575 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 11:30:38,575 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 11:30:38,575 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 11:30:38,576 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 11:30:38,576 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 11:30:38,576 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 11:30:38,576 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 11:30:38,576 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 11:30:38,577 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 11:30:38,577 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 11:30:38,577 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 11:30:38,577 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 11:30:38,578 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 11:30:38,578 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 11:30:38,578 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 11:30:38,578 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 11:30:38,578 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 11:30:38,578 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 11:30:38,579 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
[2020-08-18 11:30:38,902 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 11:30:38,915 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 11:30:38,918 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 11:30:38,920 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 11:30:38,920 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 11:30:38,921 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-08-18 11:30:38,995 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4fb3bb4c/8fc0b4eaf5a746efa9c2a08bbcb673d8/FLAGcce8deeff
[2020-08-18 11:30:39,661 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 11:30:39,662 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-08-18 11:30:39,678 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4fb3bb4c/8fc0b4eaf5a746efa9c2a08bbcb673d8/FLAGcce8deeff
[2020-08-18 11:30:39,838 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4fb3bb4c/8fc0b4eaf5a746efa9c2a08bbcb673d8
[2020-08-18 11:30:39,848 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 11:30:39,850 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 11:30:39,852 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 11:30:39,853 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 11:30:39,856 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 11:30:39,857 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:30:39" (1/1) ...
[2020-08-18 11:30:39,861 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653a9eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:39, skipping insertion in model container
[2020-08-18 11:30:39,861 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:30:39" (1/1) ...
[2020-08-18 11:30:39,870 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 11:30:39,974 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 11:30:40,861 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 11:30:40,884 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 11:30:41,711 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 11:30:41,739 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 11:30:41,740 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41 WrapperNode
[2020-08-18 11:30:41,741 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 11:30:41,741 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 11:30:41,742 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 11:30:41,742 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 11:30:41,759 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,759 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,805 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,806 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,883 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,926 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,936 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (1/1) ...
[2020-08-18 11:30:41,952 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 11:30:41,953 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 11:30:41,953 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 11:30:41,953 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 11:30:41,954 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (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 11:30:42,057 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 11:30:42,058 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 11:30:42,058 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 11:30:42,058 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 11:30:42,058 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 11:30:42,059 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 11:30:42,059 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 11:30:42,060 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 11:30:42,060 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 11:30:42,061 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 11:30:42,061 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 11:30:42,062 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 11:30:42,062 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 11:30:42,062 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 11:30:42,062 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 11:30:42,063 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 11:30:42,063 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 11:30:42,063 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 11:30:42,064 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 11:30:42,064 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 11:30:42,064 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 11:30:44,914 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 11:30:44,914 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 11:30:44,935 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:30:44 BoogieIcfgContainer
[2020-08-18 11:30:44,935 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 11:30:44,939 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 11:30:44,940 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 11:30:44,944 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 11:30:44,945 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:30:39" (1/3) ...
[2020-08-18 11:30:44,946 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1630f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:30:44, skipping insertion in model container
[2020-08-18 11:30:44,947 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:30:41" (2/3) ...
[2020-08-18 11:30:44,948 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1630f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:30:44, skipping insertion in model container
[2020-08-18 11:30:44,948 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:30:44" (3/3) ...
[2020-08-18 11:30:44,951 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-08-18 11:30:44,964 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 11:30:44,986 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 11:30:45,006 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 11:30:45,047 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 11:30:45,047 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 11:30:45,048 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 11:30:45,048 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 11:30:45,048 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 11:30:45,048 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 11:30:45,048 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 11:30:45,049 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 11:30:45,098 INFO  L276                IsEmpty]: Start isEmpty. Operand 795 states.
[2020-08-18 11:30:45,151 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 11:30:45,155 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:30:45,157 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, 1, 1, 1, 1]
[2020-08-18 11:30:45,157 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:30:45,164 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:30:45,165 INFO  L82        PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times
[2020-08-18 11:30:45,178 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:30:45,178 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83486781]
[2020-08-18 11:30:45,179 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:30:46,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:30:47,436 WARN  L193               SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-18 11:30:47,438 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:30:47,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:30:47,689 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 11:30:47,689 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83486781]
[2020-08-18 11:30:47,692 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:30:47,692 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 11:30:47,693 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694494319]
[2020-08-18 11:30:47,699 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 11:30:47,700 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:30:47,714 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 11:30:47,715 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 11:30:47,717 INFO  L87              Difference]: Start difference. First operand 795 states. Second operand 5 states.
[2020-08-18 11:30:56,278 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:30:56,279 INFO  L93              Difference]: Finished difference Result 2333 states and 4147 transitions.
[2020-08-18 11:30:56,279 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 11:30:56,282 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 324
[2020-08-18 11:30:56,283 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:30:56,314 INFO  L225             Difference]: With dead ends: 2333
[2020-08-18 11:30:56,314 INFO  L226             Difference]: Without dead ends: 1545
[2020-08-18 11:30:56,323 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 11:30:56,346 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1545 states.
[2020-08-18 11:30:56,484 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543.
[2020-08-18 11:30:56,486 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1543 states.
[2020-08-18 11:30:56,494 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions.
[2020-08-18 11:30:56,495 INFO  L78                 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324
[2020-08-18 11:30:56,498 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:30:56,498 INFO  L479      AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions.
[2020-08-18 11:30:56,498 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 11:30:56,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions.
[2020-08-18 11:30:56,510 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-18 11:30:56,511 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:30:56,512 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, 1, 1, 1, 1, 1, 1]
[2020-08-18 11:30:56,513 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 11:30:56,513 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:30:56,513 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:30:56,513 INFO  L82        PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times
[2020-08-18 11:30:56,514 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:30:56,514 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741603290]
[2020-08-18 11:30:56,514 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:30:56,627 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:30:57,668 WARN  L193               SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-18 11:30:57,672 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:30:57,684 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:30:57,979 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 11:30:57,980 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741603290]
[2020-08-18 11:30:57,980 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:30:57,980 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:30:57,982 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735747246]
[2020-08-18 11:30:57,989 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:30:57,990 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:30:57,990 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:30:57,990 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:30:57,991 INFO  L87              Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states.
[2020-08-18 11:31:07,570 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:07,570 INFO  L93              Difference]: Finished difference Result 4438 states and 6875 transitions.
[2020-08-18 11:31:07,571 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 11:31:07,571 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-18 11:31:07,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:07,592 INFO  L225             Difference]: With dead ends: 4438
[2020-08-18 11:31:07,592 INFO  L226             Difference]: Without dead ends: 3024
[2020-08-18 11:31:07,597 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:07,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3024 states.
[2020-08-18 11:31:07,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022.
[2020-08-18 11:31:07,721 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3022 states.
[2020-08-18 11:31:07,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions.
[2020-08-18 11:31:07,731 INFO  L78                 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326
[2020-08-18 11:31:07,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:07,732 INFO  L479      AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions.
[2020-08-18 11:31:07,732 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:07,732 INFO  L276                IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions.
[2020-08-18 11:31:07,741 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-18 11:31:07,742 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:07,742 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, 1, 1, 1, 1, 1, 1]
[2020-08-18 11:31:07,742 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 11:31:07,743 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:07,743 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:07,743 INFO  L82        PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times
[2020-08-18 11:31:07,744 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:07,744 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516911506]
[2020-08-18 11:31:07,744 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:07,789 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:08,467 WARN  L193               SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-18 11:31:08,469 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:08,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:08,667 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 11:31:08,667 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516911506]
[2020-08-18 11:31:08,677 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:08,677 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:08,677 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126485883]
[2020-08-18 11:31:08,678 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:08,679 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:08,679 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:08,679 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:08,679 INFO  L87              Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states.
[2020-08-18 11:31:17,585 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:17,585 INFO  L93              Difference]: Finished difference Result 8991 states and 13913 transitions.
[2020-08-18 11:31:17,586 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 11:31:17,587 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-18 11:31:17,587 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:17,613 INFO  L225             Difference]: With dead ends: 8991
[2020-08-18 11:31:17,614 INFO  L226             Difference]: Without dead ends: 6011
[2020-08-18 11:31:17,620 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:17,627 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6011 states.
[2020-08-18 11:31:17,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041.
[2020-08-18 11:31:17,774 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3041 states.
[2020-08-18 11:31:17,782 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions.
[2020-08-18 11:31:17,782 INFO  L78                 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326
[2020-08-18 11:31:17,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:17,783 INFO  L479      AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions.
[2020-08-18 11:31:17,783 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:17,783 INFO  L276                IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions.
[2020-08-18 11:31:17,795 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 11:31:17,795 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:17,796 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, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 11:31:17,796 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 11:31:17,796 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:17,796 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:17,797 INFO  L82        PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times
[2020-08-18 11:31:17,797 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:17,798 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418381256]
[2020-08-18 11:31:17,798 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:17,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:18,531 WARN  L193               SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-18 11:31:18,533 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:18,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:18,684 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 11:31:18,685 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418381256]
[2020-08-18 11:31:18,685 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:18,685 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:18,685 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316281449]
[2020-08-18 11:31:18,686 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:18,686 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:18,687 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:18,687 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:18,688 INFO  L87              Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states.
[2020-08-18 11:31:27,511 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:27,511 INFO  L93              Difference]: Finished difference Result 9010 states and 13934 transitions.
[2020-08-18 11:31:27,513 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 11:31:27,513 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 11:31:27,513 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:27,536 INFO  L225             Difference]: With dead ends: 9010
[2020-08-18 11:31:27,537 INFO  L226             Difference]: Without dead ends: 6029
[2020-08-18 11:31:27,543 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:27,551 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6029 states.
[2020-08-18 11:31:27,698 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059.
[2020-08-18 11:31:27,699 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3059 states.
[2020-08-18 11:31:27,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions.
[2020-08-18 11:31:27,705 INFO  L78                 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327
[2020-08-18 11:31:27,706 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:27,706 INFO  L479      AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions.
[2020-08-18 11:31:27,706 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:27,706 INFO  L276                IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions.
[2020-08-18 11:31:27,717 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 329
[2020-08-18 11:31:27,717 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:27,717 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 11:31:27,718 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 11:31:27,718 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:27,718 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:27,719 INFO  L82        PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times
[2020-08-18 11:31:27,719 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:27,719 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720388701]
[2020-08-18 11:31:27,719 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:27,836 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:28,491 WARN  L193               SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-18 11:31:28,492 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:28,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:28,636 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 11:31:28,636 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720388701]
[2020-08-18 11:31:28,636 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:28,636 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:28,637 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063659814]
[2020-08-18 11:31:28,637 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:28,638 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:28,638 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:28,638 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:28,639 INFO  L87              Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states.
[2020-08-18 11:31:37,000 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:37,001 INFO  L93              Difference]: Finished difference Result 8718 states and 13409 transitions.
[2020-08-18 11:31:37,004 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 11:31:37,004 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 328
[2020-08-18 11:31:37,005 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:37,027 INFO  L225             Difference]: With dead ends: 8718
[2020-08-18 11:31:37,027 INFO  L226             Difference]: Without dead ends: 5904
[2020-08-18 11:31:37,033 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:37,040 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5904 states.
[2020-08-18 11:31:37,280 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902.
[2020-08-18 11:31:37,280 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5902 states.
[2020-08-18 11:31:37,294 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions.
[2020-08-18 11:31:37,295 INFO  L78                 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328
[2020-08-18 11:31:37,296 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:37,296 INFO  L479      AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions.
[2020-08-18 11:31:37,297 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:37,297 INFO  L276                IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions.
[2020-08-18 11:31:37,310 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 329
[2020-08-18 11:31:37,311 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:37,311 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 11:31:37,311 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 11:31:37,312 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:37,312 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:37,312 INFO  L82        PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times
[2020-08-18 11:31:37,312 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:37,313 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222453396]
[2020-08-18 11:31:37,313 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:37,684 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:38,272 WARN  L193               SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-18 11:31:38,275 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:38,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:38,380 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 11:31:38,381 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222453396]
[2020-08-18 11:31:38,381 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:38,382 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 11:31:38,382 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191184269]
[2020-08-18 11:31:38,382 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 11:31:38,384 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:38,384 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 11:31:38,384 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 11:31:38,384 INFO  L87              Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states.