/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.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 11:31:01,187 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 11:31:01,190 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 11:31:01,231 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 11:31:01,231 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 11:31:01,240 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 11:31:01,243 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 11:31:01,247 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-08-18 11:31:01,252 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-08-18 11:31:01,253 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 11:31:01,254 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 11:31:01,257 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 11:31:01,259 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 11:31:01,261 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 11:31:01,262 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 11:31:01,263 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 11:31:01,264 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 11:31:01,272 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 11:31:01,275 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 11:31:01,276 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 11:31:01,277 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 11:31:01,277 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 11:31:01,289 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 11:31:01,290 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 11:31:01,294 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 11:31:01,297 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 11:31:01,297 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 11:31:01,298 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 11:31:01,298 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 11:31:01,299 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 11:31:01,304 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 11:31:01,305 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 11:31:01,307 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 11:31:01,307 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 11:31:01,308 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-08-18 11:31:01,308 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 11:31:01,309 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 11:31:01,310 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 11:31:01,332 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 11:31:01,332 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 11:31:01,333 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 11:31:01,334 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 11:31:01,334 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 11:31:01,334 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 11:31:01,334 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 11:31:01,334 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 11:31:01,335 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 11:31:01,335 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 11:31:01,335 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 11:31:01,335 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 11:31:01,335 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 11:31:01,336 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 11:31:01,336 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 11:31:01,336 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 11:31:01,336 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 11:31:01,336 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 11:31:01,337 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 11:31:01,337 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 11:31:01,337 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 11:31:01,337 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 11:31:01,337 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 11:31:01,338 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 11:31:01,338 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 11:31:01,338 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 11:31:01,338 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 11:31:01,338 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 11:31:01,339 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 11:31:01,339 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 11:31:01,650 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 11:31:01,663 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 11:31:01,666 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 11:31:01,668 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 11:31:01,668 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 11:31:01,669 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 11:31:01,751 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3efe015f9/52cb0d9245b4436d982e042a5d2f8029/FLAG5b28634d1
[2020-08-18 11:31:02,415 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 11:31:02,416 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 11:31:02,439 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3efe015f9/52cb0d9245b4436d982e042a5d2f8029/FLAG5b28634d1
[2020-08-18 11:31:02,548 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3efe015f9/52cb0d9245b4436d982e042a5d2f8029
[2020-08-18 11:31:02,558 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 11:31:02,559 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 11:31:02,561 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 11:31:02,561 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 11:31:02,564 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 11:31:02,565 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:02" (1/1) ...
[2020-08-18 11:31:02,568 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384a97ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:02, skipping insertion in model container
[2020-08-18 11:31:02,568 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:02" (1/1) ...
[2020-08-18 11:31:02,576 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 11:31:02,741 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 11:31:04,319 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 11:31:04,344 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 11:31:05,428 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 11:31:05,462 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 11:31:05,463 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05 WrapperNode
[2020-08-18 11:31:05,464 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 11:31:05,465 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 11:31:05,465 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 11:31:05,465 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 11:31:05,481 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,482 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,524 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,524 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,591 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,631 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,650 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (1/1) ...
[2020-08-18 11:31:05,674 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 11:31:05,675 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 11:31:05,675 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 11:31:05,675 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 11:31:05,676 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (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
[2020-08-18 11:31:05,759 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 11:31:05,759 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 11:31:05,759 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 11:31:05,760 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 11:31:05,760 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 11:31:05,760 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 11:31:05,761 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 11:31:05,761 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 11:31:05,761 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 11:31:05,761 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 11:31:05,762 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 11:31:05,763 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 11:31:05,763 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 11:31:05,763 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 11:31:05,763 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 11:31:05,764 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 11:31:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 11:31:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 11:31:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 11:31:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 11:31:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 11:31:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 11:31:09,320 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 11:31:09,320 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 11:31:09,330 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:09 BoogieIcfgContainer
[2020-08-18 11:31:09,330 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 11:31:09,332 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 11:31:09,332 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 11:31:09,335 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 11:31:09,335 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:31:02" (1/3) ...
[2020-08-18 11:31:09,336 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f44789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:09, skipping insertion in model container
[2020-08-18 11:31:09,336 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:05" (2/3) ...
[2020-08-18 11:31:09,337 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f44789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:09, skipping insertion in model container
[2020-08-18 11:31:09,337 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:09" (3/3) ...
[2020-08-18 11:31:09,339 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 11:31:09,351 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 11:31:09,360 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-08-18 11:31:09,375 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-08-18 11:31:09,406 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 11:31:09,406 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 11:31:09,406 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 11:31:09,406 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 11:31:09,406 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 11:31:09,407 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 11:31:09,407 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 11:31:09,407 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 11:31:09,445 INFO  L276                IsEmpty]: Start isEmpty. Operand 1027 states.
[2020-08-18 11:31:09,472 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 11:31:09,473 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:09,474 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 11:31:09,475 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:09,483 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:09,484 INFO  L82        PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times
[2020-08-18 11:31:09,493 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:09,494 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489175821]
[2020-08-18 11:31:09,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:10,176 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:11,509 WARN  L193               SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 11:31:11,511 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:11,519 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:11,724 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 11:31:11,726 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489175821]
[2020-08-18 11:31:11,728 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:11,729 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:11,730 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865260884]
[2020-08-18 11:31:11,738 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:11,739 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:11,755 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:11,756 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:11,760 INFO  L87              Difference]: Start difference. First operand 1027 states. Second operand 4 states.
[2020-08-18 11:31:12,766 WARN  L193               SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 11:31:20,881 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:20,881 INFO  L93              Difference]: Finished difference Result 1794 states and 3183 transitions.
[2020-08-18 11:31:20,882 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 11:31:20,884 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 11:31:20,886 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:20,914 INFO  L225             Difference]: With dead ends: 1794
[2020-08-18 11:31:20,914 INFO  L226             Difference]: Without dead ends: 1483
[2020-08-18 11:31:20,922 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 11:31:20,946 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1483 states.
[2020-08-18 11:31:21,067 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481.
[2020-08-18 11:31:21,068 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1481 states.
[2020-08-18 11:31:21,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions.
[2020-08-18 11:31:21,077 INFO  L78                 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327
[2020-08-18 11:31:21,079 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:21,079 INFO  L479      AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions.
[2020-08-18 11:31:21,079 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:21,080 INFO  L276                IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions.
[2020-08-18 11:31:21,086 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 11:31:21,086 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:21,086 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 11:31:21,087 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 11:31:21,087 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:21,088 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:21,088 INFO  L82        PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times
[2020-08-18 11:31:21,088 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:21,089 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96083789]
[2020-08-18 11:31:21,089 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:21,324 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:22,719 WARN  L193               SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 11:31:22,721 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:22,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:22,922 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 11:31:22,923 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96083789]
[2020-08-18 11:31:22,923 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:22,924 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:22,924 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584692134]
[2020-08-18 11:31:22,926 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:22,926 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:22,927 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:22,927 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:22,927 INFO  L87              Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states.
[2020-08-18 11:31:23,562 WARN  L193               SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 11:31:30,973 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:30,973 INFO  L93              Difference]: Finished difference Result 2844 states and 4401 transitions.
[2020-08-18 11:31:30,975 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 11:31:30,975 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 11:31:30,977 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:30,991 INFO  L225             Difference]: With dead ends: 2844
[2020-08-18 11:31:30,991 INFO  L226             Difference]: Without dead ends: 2425
[2020-08-18 11:31:30,999 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 11:31:31,004 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2425 states.
[2020-08-18 11:31:31,078 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423.
[2020-08-18 11:31:31,079 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2423 states.
[2020-08-18 11:31:31,090 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions.
[2020-08-18 11:31:31,090 INFO  L78                 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327
[2020-08-18 11:31:31,092 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:31,092 INFO  L479      AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions.
[2020-08-18 11:31:31,092 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:31,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions.
[2020-08-18 11:31:31,100 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 11:31:31,100 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:31,101 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 11:31:31,102 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 11:31:31,110 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:31,110 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:31,110 INFO  L82        PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times
[2020-08-18 11:31:31,111 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:31,111 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145911632]
[2020-08-18 11:31:31,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:31,302 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:32,210 WARN  L193               SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 11:31:32,212 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:32,218 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:32,379 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 11:31:32,379 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145911632]
[2020-08-18 11:31:32,380 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:32,380 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:32,381 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455764660]
[2020-08-18 11:31:32,381 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:32,382 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:32,382 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:32,383 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:32,383 INFO  L87              Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states.
[2020-08-18 11:31:33,053 WARN  L193               SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 11:31:39,603 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:39,603 INFO  L93              Difference]: Finished difference Result 5038 states and 7854 transitions.
[2020-08-18 11:31:39,604 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 11:31:39,604 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 11:31:39,605 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:39,626 INFO  L225             Difference]: With dead ends: 5038
[2020-08-18 11:31:39,626 INFO  L226             Difference]: Without dead ends: 4361
[2020-08-18 11:31:39,629 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 11:31:39,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4361 states.
[2020-08-18 11:31:39,740 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359.
[2020-08-18 11:31:39,740 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4359 states.
[2020-08-18 11:31:39,754 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions.
[2020-08-18 11:31:39,754 INFO  L78                 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327
[2020-08-18 11:31:39,755 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:39,755 INFO  L479      AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions.
[2020-08-18 11:31:39,756 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 11:31:39,756 INFO  L276                IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions.
[2020-08-18 11:31:39,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 11:31:39,767 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:39,767 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 11:31:39,767 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 11:31:39,768 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:39,768 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:39,768 INFO  L82        PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times
[2020-08-18 11:31:39,768 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:39,769 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624894536]
[2020-08-18 11:31:39,769 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:40,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:41,002 WARN  L193               SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 11:31:41,004 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:41,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:41,170 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 11:31:41,171 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624894536]
[2020-08-18 11:31:41,171 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:41,171 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 11:31:41,171 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457744509]
[2020-08-18 11:31:41,172 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 11:31:41,172 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:41,172 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 11:31:41,173 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 11:31:41,173 INFO  L87              Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states.
[2020-08-18 11:31:51,077 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 11:31:51,077 INFO  L93              Difference]: Finished difference Result 12898 states and 19904 transitions.
[2020-08-18 11:31:51,083 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 11:31:51,083 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 327
[2020-08-18 11:31:51,084 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 11:31:51,121 INFO  L225             Difference]: With dead ends: 12898
[2020-08-18 11:31:51,122 INFO  L226             Difference]: Without dead ends: 8554
[2020-08-18 11:31:51,131 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 11:31:51,140 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8554 states.
[2020-08-18 11:31:51,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347.
[2020-08-18 11:31:51,427 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8347 states.
[2020-08-18 11:31:51,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions.
[2020-08-18 11:31:51,445 INFO  L78                 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327
[2020-08-18 11:31:51,446 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 11:31:51,446 INFO  L479      AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions.
[2020-08-18 11:31:51,446 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 11:31:51,446 INFO  L276                IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions.
[2020-08-18 11:31:51,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 330
[2020-08-18 11:31:51,466 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 11:31:51,467 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]
[2020-08-18 11:31:51,467 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 11:31:51,467 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 11:31:51,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 11:31:51,468 INFO  L82        PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times
[2020-08-18 11:31:51,468 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 11:31:51,469 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867031720]
[2020-08-18 11:31:51,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 11:31:51,562 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:52,292 WARN  L193               SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 11:31:52,294 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 11:31:52,309 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 11:31:52,468 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 11:31:52,469 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867031720]
[2020-08-18 11:31:52,469 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 11:31:52,469 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 11:31:52,470 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987489099]
[2020-08-18 11:31:52,470 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 11:31:52,471 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 11:31:52,471 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 11:31:52,471 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 11:31:52,471 INFO  L87              Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states.