/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -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-c90d42b
[2020-09-24 15:11:01,874 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:11:01,878 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:11:01,904 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:11:01,904 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:11:01,905 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:11:01,907 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 15:11:01,909 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 15:11:01,911 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 15:11:01,912 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 15:11:01,914 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:11:01,915 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:11:01,917 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:11:01,918 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:11:01,919 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:11:01,920 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:11:01,924 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:11:01,927 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:11:01,932 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:11:01,936 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:11:01,937 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:11:01,939 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:11:01,942 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:11:01,942 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:11:01,942 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:11:01,945 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:11:01,945 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:11:01,949 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:11:01,949 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:11:01,950 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:11:01,951 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:11:01,952 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:11:01,954 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:11:01,954 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:11:01,955 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 15:11:01,955 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 15:11:01,958 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:11:01,959 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
[2020-09-24 15:11:02,022 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 15:11:02,022 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:11:02,024 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:11:02,024 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 15:11:02,024 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 15:11:02,024 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:11:02,025 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 15:11:02,025 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 15:11:02,025 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 15:11:02,025 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 15:11:02,025 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:11:02,026 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:11:02,026 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:11:02,026 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 15:11:02,026 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 15:11:02,026 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 15:11:02,027 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:11:02,027 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:11:02,027 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 15:11:02,027 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 15:11:02,027 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 15:11:02,028 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:11:02,028 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:11:02,028 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:11:02,028 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:11:02,029 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 15:11:02,029 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:11:02,029 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:11:02,029 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 15:11:02,029 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.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 15:11:02,494 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:11:02,512 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:11:02,517 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:11:02,519 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 15:11:02,519 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 15:11:02,521 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:02,612 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edeb1d0b6/ad9462ca57a245e7beecb65547b461e6/FLAGe49f4b8ee
[2020-09-24 15:11:03,401 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 15:11:03,402 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:03,432 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edeb1d0b6/ad9462ca57a245e7beecb65547b461e6/FLAGe49f4b8ee
[2020-09-24 15:11:03,539 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edeb1d0b6/ad9462ca57a245e7beecb65547b461e6
[2020-09-24 15:11:03,555 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:11:03,560 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:11:03,562 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:11:03,562 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:11:03,566 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:11:03,567 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:11:03" (1/1) ...
[2020-09-24 15:11:03,572 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1613be08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:03, skipping insertion in model container
[2020-09-24 15:11:03,572 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:11:03" (1/1) ...
[2020-09-24 15:11:03,581 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 15:11:03,689 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:11:04,753 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:11:04,770 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 15:11:05,341 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:11:05,368 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 15:11:05,369 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05 WrapperNode
[2020-09-24 15:11:05,369 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:11:05,370 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:11:05,371 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:11:05,371 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:11:05,390 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,391 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,420 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,420 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,482 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,516 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,529 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (1/1) ...
[2020-09-24 15:11:05,557 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:11:05,558 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:11:05,558 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:11:05,558 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:11:05,560 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (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
[2020-09-24 15:11:05,671 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:11:05,671 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:11:05,672 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 15:11:05,672 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:11:05,673 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:11:05,673 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-24 15:11:05,674 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-09-24 15:11:05,675 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-24 15:11:05,675 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-24 15:11:05,675 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 15:11:05,677 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 15:11:05,677 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-24 15:11:05,677 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-24 15:11:05,677 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-24 15:11:05,677 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-24 15:11:05,678 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-24 15:11:05,679 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-09-24 15:11:05,679 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-24 15:11:05,679 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-24 15:11:05,679 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:11:05,680 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:11:05,680 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:11:09,176 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:11:09,177 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 15:11:09,193 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:09 BoogieIcfgContainer
[2020-09-24 15:11:09,193 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:11:09,195 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:11:09,195 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:11:09,199 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:11:09,200 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:11:03" (1/3) ...
[2020-09-24 15:11:09,200 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67de8739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:09, skipping insertion in model container
[2020-09-24 15:11:09,201 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:05" (2/3) ...
[2020-09-24 15:11:09,201 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67de8739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:09, skipping insertion in model container
[2020-09-24 15:11:09,201 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:09" (3/3) ...
[2020-09-24 15:11:09,204 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:09,216 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:11:09,230 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:11:09,253 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:11:09,292 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:11:09,292 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 15:11:09,292 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:11:09,292 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:11:09,293 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:11:09,293 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 15:11:09,293 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:11:09,293 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:11:09,346 INFO  L276                IsEmpty]: Start isEmpty. Operand 1994 states.
[2020-09-24 15:11:09,442 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 909
[2020-09-24 15:11:09,443 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:09,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:09,446 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:09,453 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:09,454 INFO  L82        PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times
[2020-09-24 15:11:09,466 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:09,467 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760294973]
[2020-09-24 15:11:09,467 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:10,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:12,114 WARN  L193               SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:12,116 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:12,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:13,041 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:13,042 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760294973]
[2020-09-24 15:11:13,044 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:13,045 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:13,046 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805673750]
[2020-09-24 15:11:13,053 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:13,054 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:13,069 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:13,070 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:13,072 INFO  L87              Difference]: Start difference. First operand 1994 states. Second operand 4 states.
[2020-09-24 15:11:22,430 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:22,430 INFO  L93              Difference]: Finished difference Result 3387 states and 4474 transitions.
[2020-09-24 15:11:22,431 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:11:22,433 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 908
[2020-09-24 15:11:22,438 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:22,486 INFO  L225             Difference]: With dead ends: 3387
[2020-09-24 15:11:22,486 INFO  L226             Difference]: Without dead ends: 2783
[2020-09-24 15:11:22,496 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
[2020-09-24 15:11:22,523 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2783 states.
[2020-09-24 15:11:22,667 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2770.
[2020-09-24 15:11:22,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2770 states.
[2020-09-24 15:11:22,681 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3483 transitions.
[2020-09-24 15:11:22,684 INFO  L78                 Accepts]: Start accepts. Automaton has 2770 states and 3483 transitions. Word has length 908
[2020-09-24 15:11:22,687 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:22,688 INFO  L479      AbstractCegarLoop]: Abstraction has 2770 states and 3483 transitions.
[2020-09-24 15:11:22,688 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:11:22,688 INFO  L276                IsEmpty]: Start isEmpty. Operand 2770 states and 3483 transitions.
[2020-09-24 15:11:22,721 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 909
[2020-09-24 15:11:22,721 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:22,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:22,723 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:11:22,724 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:22,724 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:22,725 INFO  L82        PathProgramCache]: Analyzing trace with hash -4225536, now seen corresponding path program 1 times
[2020-09-24 15:11:22,725 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:22,725 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556689972]
[2020-09-24 15:11:22,726 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:23,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:24,072 WARN  L193               SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:24,073 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:24,080 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:24,634 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:24,634 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556689972]
[2020-09-24 15:11:24,635 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:24,635 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:11:24,635 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521316674]
[2020-09-24 15:11:24,638 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:11:24,639 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:24,639 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:11:24,640 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:11:24,640 INFO  L87              Difference]: Start difference. First operand 2770 states and 3483 transitions. Second operand 5 states.
[2020-09-24 15:11:37,209 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:37,210 INFO  L93              Difference]: Finished difference Result 7628 states and 9724 transitions.
[2020-09-24 15:11:37,214 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 15:11:37,215 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 908
[2020-09-24 15:11:37,216 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:37,242 INFO  L225             Difference]: With dead ends: 7628
[2020-09-24 15:11:37,243 INFO  L226             Difference]: Without dead ends: 5156
[2020-09-24 15:11:37,251 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
[2020-09-24 15:11:37,260 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5156 states.
[2020-09-24 15:11:37,417 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5156 to 5154.
[2020-09-24 15:11:37,417 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5154 states.
[2020-09-24 15:11:37,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5154 states to 5154 states and 6526 transitions.
[2020-09-24 15:11:37,437 INFO  L78                 Accepts]: Start accepts. Automaton has 5154 states and 6526 transitions. Word has length 908
[2020-09-24 15:11:37,438 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:37,438 INFO  L479      AbstractCegarLoop]: Abstraction has 5154 states and 6526 transitions.
[2020-09-24 15:11:37,439 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:11:37,439 INFO  L276                IsEmpty]: Start isEmpty. Operand 5154 states and 6526 transitions.
[2020-09-24 15:11:37,456 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 911
[2020-09-24 15:11:37,457 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:37,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:37,458 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:11:37,462 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:37,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:37,469 INFO  L82        PathProgramCache]: Analyzing trace with hash 1009058211, now seen corresponding path program 1 times
[2020-09-24 15:11:37,469 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:37,469 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456685892]
[2020-09-24 15:11:37,471 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:37,692 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:38,865 WARN  L193               SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:38,866 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:38,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:39,762 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:39,762 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456685892]
[2020-09-24 15:11:39,763 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:39,763 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:39,763 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761566017]
[2020-09-24 15:11:39,765 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:39,765 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:39,766 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:39,766 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:39,766 INFO  L87              Difference]: Start difference. First operand 5154 states and 6526 transitions. Second operand 4 states.
[2020-09-24 15:11:54,087 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:54,087 INFO  L93              Difference]: Finished difference Result 14484 states and 18439 transitions.
[2020-09-24 15:11:54,088 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:11:54,088 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 910
[2020-09-24 15:11:54,089 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:54,131 INFO  L225             Difference]: With dead ends: 14484
[2020-09-24 15:11:54,131 INFO  L226             Difference]: Without dead ends: 9834
[2020-09-24 15:11:54,141 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
[2020-09-24 15:11:54,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9834 states.
[2020-09-24 15:11:54,367 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9834 to 9832.
[2020-09-24 15:11:54,367 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9832 states.
[2020-09-24 15:11:54,383 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9832 states to 9832 states and 12481 transitions.
[2020-09-24 15:11:54,383 INFO  L78                 Accepts]: Start accepts. Automaton has 9832 states and 12481 transitions. Word has length 910
[2020-09-24 15:11:54,384 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:54,385 INFO  L479      AbstractCegarLoop]: Abstraction has 9832 states and 12481 transitions.
[2020-09-24 15:11:54,385 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:11:54,385 INFO  L276                IsEmpty]: Start isEmpty. Operand 9832 states and 12481 transitions.
[2020-09-24 15:11:54,410 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 911
[2020-09-24 15:11:54,410 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:54,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:54,411 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:11:54,411 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:54,411 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:54,412 INFO  L82        PathProgramCache]: Analyzing trace with hash 52623386, now seen corresponding path program 1 times
[2020-09-24 15:11:54,412 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:54,413 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712595296]
[2020-09-24 15:11:54,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:54,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:55,263 WARN  L193               SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:55,265 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:55,271 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:55,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:55,733 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712595296]
[2020-09-24 15:11:55,733 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:55,733 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:55,733 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970003829]
[2020-09-24 15:11:55,734 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:55,735 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:55,735 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:55,735 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:55,735 INFO  L87              Difference]: Start difference. First operand 9832 states and 12481 transitions. Second operand 4 states.