/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 false -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-eb0fd7c
[2020-09-21 10:32:55,071 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-21 10:32:55,075 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-21 10:32:55,100 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-21 10:32:55,101 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-21 10:32:55,102 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-21 10:32:55,103 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-21 10:32:55,105 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-21 10:32:55,107 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-21 10:32:55,108 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-21 10:32:55,110 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-21 10:32:55,110 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-21 10:32:55,111 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-21 10:32:55,113 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-21 10:32:55,115 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-21 10:32:55,116 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-21 10:32:55,119 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-21 10:32:55,122 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-21 10:32:55,124 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-21 10:32:55,126 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-21 10:32:55,131 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-21 10:32:55,132 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-21 10:32:55,133 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-21 10:32:55,138 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-21 10:32:55,138 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-21 10:32:55,139 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-21 10:32:55,141 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-21 10:32:55,142 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-21 10:32:55,144 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-21 10:32:55,144 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-21 10:32:55,145 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-21 10:32:55,145 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-21 10:32:55,147 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-21 10:32:55,148 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-21 10:32:55,148 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-21 10:32:55,149 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-21 10:32:55,149 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-21 10:32:55,149 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-21 10:32:55,150 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-21 10:32:55,152 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-21 10:32:55,153 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
[2020-09-21 10:32:55,213 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-21 10:32:55,213 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-21 10:32:55,214 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-21 10:32:55,215 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-21 10:32:55,215 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-21 10:32:55,215 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-21 10:32:55,215 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-21 10:32:55,216 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-21 10:32:55,217 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-21 10:32:55,217 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-21 10:32:55,218 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-21 10:32:55,218 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-21 10:32:55,218 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-21 10:32:55,218 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-21 10:32:55,218 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-21 10:32:55,219 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-21 10:32:55,220 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-21 10:32:55,220 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-21 10:32:55,220 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-21 10:32:55,220 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-21 10:32:55,221 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-21 10:32:55,221 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-21 10:32:55,221 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-21 10:32:55,221 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-21 10:32:55,221 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-21 10:32:55,222 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-21 10:32:55,222 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-21 10:32:55,222 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-21 10:32:55,222 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-21 10:32:55,222 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 -> false
[2020-09-21 10:32:55,679 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-21 10:32:55,698 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-21 10:32:55,702 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-21 10:32:55,704 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-21 10:32:55,704 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-21 10:32:55,705 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-21 10:32:55,782 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc5e7d2be/fd541a02a21f488aaf4d3fd94e45be3b/FLAG5ada9db53
[2020-09-21 10:32:56,509 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-21 10:32:56,513 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-21 10:32:56,540 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc5e7d2be/fd541a02a21f488aaf4d3fd94e45be3b/FLAG5ada9db53
[2020-09-21 10:32:56,636 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc5e7d2be/fd541a02a21f488aaf4d3fd94e45be3b
[2020-09-21 10:32:56,649 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-21 10:32:56,657 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-21 10:32:56,660 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-21 10:32:56,660 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-21 10:32:56,664 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-21 10:32:56,665 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:56" (1/1) ...
[2020-09-21 10:32:56,670 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d1a539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:56, skipping insertion in model container
[2020-09-21 10:32:56,670 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:56" (1/1) ...
[2020-09-21 10:32:56,680 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-21 10:32:56,851 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-21 10:32:58,462 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-21 10:32:58,476 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-21 10:32:59,529 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-21 10:32:59,562 INFO  L208         MainTranslator]: Completed translation
[2020-09-21 10:32:59,564 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59 WrapperNode
[2020-09-21 10:32:59,564 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-21 10:32:59,565 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-21 10:32:59,565 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-21 10:32:59,565 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-21 10:32:59,585 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,586 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,620 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,621 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,692 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,735 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,751 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (1/1) ...
[2020-09-21 10:32:59,775 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-21 10:32:59,776 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-21 10:32:59,776 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-21 10:32:59,776 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-21 10:32:59,779 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (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
[2020-09-21 10:32:59,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-21 10:32:59,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-21 10:32:59,876 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-21 10:32:59,877 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-21 10:32:59,877 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-21 10:32:59,877 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-21 10:32:59,878 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-09-21 10:32:59,878 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-21 10:32:59,878 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-21 10:32:59,878 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-21 10:32:59,879 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-21 10:32:59,879 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-21 10:32:59,880 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-21 10:32:59,880 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-21 10:32:59,880 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-21 10:32:59,881 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-21 10:32:59,881 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-09-21 10:32:59,881 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-21 10:32:59,881 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-21 10:32:59,882 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-21 10:32:59,882 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-21 10:32:59,882 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-21 10:33:03,306 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-21 10:33:03,306 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-21 10:33:03,323 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:33:03 BoogieIcfgContainer
[2020-09-21 10:33:03,323 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-21 10:33:03,326 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-21 10:33:03,326 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-21 10:33:03,330 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-21 10:33:03,330 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:32:56" (1/3) ...
[2020-09-21 10:33:03,332 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bccc654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:33:03, skipping insertion in model container
[2020-09-21 10:33:03,333 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:59" (2/3) ...
[2020-09-21 10:33:03,334 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bccc654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:33:03, skipping insertion in model container
[2020-09-21 10:33:03,335 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:33:03" (3/3) ...
[2020-09-21 10:33:03,338 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-21 10:33:03,350 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-21 10:33:03,366 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-09-21 10:33:03,391 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-09-21 10:33:03,432 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-21 10:33:03,432 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-21 10:33:03,433 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-21 10:33:03,433 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-21 10:33:03,433 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-21 10:33:03,433 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-21 10:33:03,433 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-21 10:33:03,433 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-21 10:33:03,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 1027 states.
[2020-09-21 10:33:03,523 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-09-21 10:33:03,524 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:03,527 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]
[2020-09-21 10:33:03,528 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]===
[2020-09-21 10:33:03,536 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:03,537 INFO  L82        PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times
[2020-09-21 10:33:03,548 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:03,549 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427489785]
[2020-09-21 10:33:03,549 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:04,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:05,475 WARN  L193               SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-09-21 10:33:05,477 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:05,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:05,698 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:05,699 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427489785]
[2020-09-21 10:33:05,701 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:05,701 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:33:05,702 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363564911]
[2020-09-21 10:33:05,709 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:33:05,709 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:05,726 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:33:05,727 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:33:05,730 INFO  L87              Difference]: Start difference. First operand 1027 states. Second operand 4 states.
[2020-09-21 10:33:06,531 WARN  L193               SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-09-21 10:33:14,617 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:33:14,618 INFO  L93              Difference]: Finished difference Result 1794 states and 3183 transitions.
[2020-09-21 10:33:14,619 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:33:14,620 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-09-21 10:33:14,623 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:33:14,653 INFO  L225             Difference]: With dead ends: 1794
[2020-09-21 10:33:14,653 INFO  L226             Difference]: Without dead ends: 1483
[2020-09-21 10:33:14,660 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:33:14,685 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1483 states.
[2020-09-21 10:33:14,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481.
[2020-09-21 10:33:14,799 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1481 states.
[2020-09-21 10:33:14,807 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions.
[2020-09-21 10:33:14,810 INFO  L78                 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327
[2020-09-21 10:33:14,811 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:33:14,811 INFO  L479      AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions.
[2020-09-21 10:33:14,811 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:33:14,812 INFO  L276                IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions.
[2020-09-21 10:33:14,819 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-09-21 10:33:14,819 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:14,820 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]
[2020-09-21 10:33:14,820 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-21 10:33:14,821 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]===
[2020-09-21 10:33:14,821 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:14,821 INFO  L82        PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times
[2020-09-21 10:33:14,822 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:14,822 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682678749]
[2020-09-21 10:33:14,822 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:15,035 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:16,473 WARN  L193               SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 322
[2020-09-21 10:33:16,475 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:16,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:16,716 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:16,717 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682678749]
[2020-09-21 10:33:16,717 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:16,718 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:33:16,718 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824982441]
[2020-09-21 10:33:16,721 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:33:16,722 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:16,722 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:33:16,722 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:33:16,723 INFO  L87              Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states.
[2020-09-21 10:33:17,508 WARN  L193               SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-09-21 10:33:25,296 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:33:25,296 INFO  L93              Difference]: Finished difference Result 2844 states and 4401 transitions.
[2020-09-21 10:33:25,299 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:33:25,299 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-09-21 10:33:25,304 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:33:25,322 INFO  L225             Difference]: With dead ends: 2844
[2020-09-21 10:33:25,323 INFO  L226             Difference]: Without dead ends: 2425
[2020-09-21 10:33:25,334 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:33:25,340 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2425 states.
[2020-09-21 10:33:25,442 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423.
[2020-09-21 10:33:25,444 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2423 states.
[2020-09-21 10:33:25,463 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions.
[2020-09-21 10:33:25,464 INFO  L78                 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327
[2020-09-21 10:33:25,466 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:33:25,466 INFO  L479      AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions.
[2020-09-21 10:33:25,467 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:33:25,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions.
[2020-09-21 10:33:25,482 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-09-21 10:33:25,482 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:25,483 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]
[2020-09-21 10:33:25,484 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-21 10:33:25,491 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]===
[2020-09-21 10:33:25,491 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:25,491 INFO  L82        PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times
[2020-09-21 10:33:25,492 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:25,493 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002377430]
[2020-09-21 10:33:25,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:25,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:26,717 WARN  L193               SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-09-21 10:33:26,719 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:26,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:26,930 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:26,930 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002377430]
[2020-09-21 10:33:26,931 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:26,931 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:33:26,931 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129441800]
[2020-09-21 10:33:26,932 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:33:26,932 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:26,932 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:33:26,933 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:33:26,933 INFO  L87              Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states.
[2020-09-21 10:33:27,735 WARN  L193               SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-09-21 10:33:34,755 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:33:34,755 INFO  L93              Difference]: Finished difference Result 5038 states and 7854 transitions.
[2020-09-21 10:33:34,756 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:33:34,756 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-09-21 10:33:34,757 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:33:34,778 INFO  L225             Difference]: With dead ends: 5038
[2020-09-21 10:33:34,778 INFO  L226             Difference]: Without dead ends: 4361
[2020-09-21 10:33:34,781 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:33:34,786 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4361 states.
[2020-09-21 10:33:34,887 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359.
[2020-09-21 10:33:34,887 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4359 states.
[2020-09-21 10:33:34,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions.
[2020-09-21 10:33:34,901 INFO  L78                 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327
[2020-09-21 10:33:34,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:33:34,901 INFO  L479      AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions.
[2020-09-21 10:33:34,902 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:33:34,902 INFO  L276                IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions.
[2020-09-21 10:33:34,912 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-09-21 10:33:34,912 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:34,913 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]
[2020-09-21 10:33:34,913 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-21 10:33:34,913 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]===
[2020-09-21 10:33:34,913 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:34,914 INFO  L82        PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times
[2020-09-21 10:33:34,914 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:34,914 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643642166]
[2020-09-21 10:33:34,915 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:35,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:36,344 WARN  L193               SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-09-21 10:33:36,346 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:36,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:36,554 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:36,554 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643642166]
[2020-09-21 10:33:36,555 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:36,555 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-21 10:33:36,555 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308796051]
[2020-09-21 10:33:36,556 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-21 10:33:36,556 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:36,556 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-21 10:33:36,557 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:33:36,557 INFO  L87              Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states.
[2020-09-21 10:33:46,719 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:33:46,720 INFO  L93              Difference]: Finished difference Result 12898 states and 19904 transitions.
[2020-09-21 10:33:46,721 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:33:46,721 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 327
[2020-09-21 10:33:46,721 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:33:46,763 INFO  L225             Difference]: With dead ends: 12898
[2020-09-21 10:33:46,763 INFO  L226             Difference]: Without dead ends: 8554
[2020-09-21 10:33:46,773 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-21 10:33:46,782 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8554 states.
[2020-09-21 10:33:47,128 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347.
[2020-09-21 10:33:47,128 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8347 states.
[2020-09-21 10:33:47,156 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions.
[2020-09-21 10:33:47,156 INFO  L78                 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327
[2020-09-21 10:33:47,157 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:33:47,157 INFO  L479      AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions.
[2020-09-21 10:33:47,157 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-21 10:33:47,157 INFO  L276                IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions.
[2020-09-21 10:33:47,177 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 330
[2020-09-21 10:33:47,177 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:47,178 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]
[2020-09-21 10:33:47,178 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-21 10:33:47,178 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]===
[2020-09-21 10:33:47,179 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:47,179 INFO  L82        PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times
[2020-09-21 10:33:47,179 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:47,180 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513745518]
[2020-09-21 10:33:47,180 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:47,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:48,251 WARN  L193               SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-09-21 10:33:48,253 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:48,260 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:48,419 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:48,420 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513745518]
[2020-09-21 10:33:48,420 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:48,420 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:33:48,421 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892830685]
[2020-09-21 10:33:48,421 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:33:48,422 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:48,422 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:33:48,422 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:33:48,422 INFO  L87              Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states.