/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 13:07:05,388 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 13:07:05,391 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 13:07:05,415 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 13:07:05,415 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 13:07:05,416 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 13:07:05,418 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 13:07:05,420 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 13:07:05,421 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 13:07:05,422 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 13:07:05,423 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 13:07:05,424 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 13:07:05,425 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 13:07:05,426 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 13:07:05,427 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 13:07:05,428 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 13:07:05,429 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 13:07:05,430 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 13:07:05,432 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 13:07:05,434 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 13:07:05,435 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 13:07:05,436 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 13:07:05,438 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 13:07:05,438 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 13:07:05,441 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 13:07:05,441 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 13:07:05,442 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 13:07:05,442 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 13:07:05,443 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 13:07:05,444 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 13:07:05,444 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 13:07:05,445 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 13:07:05,445 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 13:07:05,446 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 13:07:05,447 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 13:07:05,448 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 13:07:05,448 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 13:07:05,448 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 13:07:05,449 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 13:07:05,449 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 13:07:05,450 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 13:07:05,451 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 13:07:05,472 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 13:07:05,473 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 13:07:05,474 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 13:07:05,474 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 13:07:05,474 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 13:07:05,475 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 13:07:05,478 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 13:07:05,478 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 13:07:05,478 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 13:07:05,478 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 13:07:05,479 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 13:07:05,479 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 13:07:05,479 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 13:07:05,479 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 13:07:05,479 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 13:07:05,480 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 13:07:05,480 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 13:07:05,480 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 13:07:05,480 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 13:07:05,480 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 13:07:05,480 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 13:07:05,483 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 13:07:05,483 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 13:07:05,483 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 13:07:05,484 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 13:07:05,484 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 13:07:05,484 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 13:07:05,484 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 13:07:05,484 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 13:07:05,485 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST;
[2020-08-18 13:07:05,856 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 13:07:05,875 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 13:07:05,878 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 13:07:05,880 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 13:07:05,883 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 13:07:05,884 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 13:07:05,962 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a20d813/13d569e7d26f4ea5a346b278efd21dee/FLAGbe20208c6
[2020-08-18 13:07:06,612 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 13:07:06,613 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 13:07:06,631 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a20d813/13d569e7d26f4ea5a346b278efd21dee/FLAGbe20208c6
[2020-08-18 13:07:06,822 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51a20d813/13d569e7d26f4ea5a346b278efd21dee
[2020-08-18 13:07:06,831 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 13:07:06,832 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 13:07:06,833 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 13:07:06,834 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 13:07:06,839 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 13:07:06,840 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:07:06" (1/1) ...
[2020-08-18 13:07:06,842 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee4d01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:06, skipping insertion in model container
[2020-08-18 13:07:06,843 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:07:06" (1/1) ...
[2020-08-18 13:07:06,850 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 13:07:06,983 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 13:07:08,116 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 13:07:08,132 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 13:07:08,585 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 13:07:08,618 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 13:07:08,619 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08 WrapperNode
[2020-08-18 13:07:08,620 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 13:07:08,621 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 13:07:08,621 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 13:07:08,621 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 13:07:08,636 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,638 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,685 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,686 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,755 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,785 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,792 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (1/1) ...
[2020-08-18 13:07:08,803 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 13:07:08,804 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 13:07:08,804 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 13:07:08,804 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 13:07:08,805 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (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 13:07:08,878 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 13:07:08,879 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 13:07:08,879 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 13:07:08,879 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 13:07:08,880 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 13:07:08,880 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 13:07:08,880 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 13:07:08,880 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 13:07:08,880 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 13:07:08,880 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 13:07:08,881 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 13:07:08,881 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 13:07:08,881 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 13:07:08,881 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 13:07:08,881 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 13:07:08,882 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 13:07:08,882 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 13:07:08,882 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 13:07:08,882 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 13:07:08,882 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 13:07:08,883 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 13:07:08,883 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 13:07:11,612 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 13:07:11,612 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 13:07:11,630 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:11 BoogieIcfgContainer
[2020-08-18 13:07:11,630 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 13:07:11,635 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 13:07:11,636 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 13:07:11,639 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 13:07:11,640 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:07:06" (1/3) ...
[2020-08-18 13:07:11,641 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf4e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:11, skipping insertion in model container
[2020-08-18 13:07:11,641 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:07:08" (2/3) ...
[2020-08-18 13:07:11,642 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf4e237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:07:11, skipping insertion in model container
[2020-08-18 13:07:11,642 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:07:11" (3/3) ...
[2020-08-18 13:07:11,646 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 13:07:11,658 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 13:07:11,674 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 13:07:11,691 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 13:07:11,734 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 13:07:11,734 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 13:07:11,734 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 13:07:11,734 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 13:07:11,734 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 13:07:11,735 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 13:07:11,735 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 13:07:11,735 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 13:07:11,775 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-08-18 13:07:11,814 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 13:07:11,817 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:11,820 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, 1, 1, 1]
[2020-08-18 13:07:11,820 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:11,827 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:11,828 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-08-18 13:07:11,837 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:11,837 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296933905]
[2020-08-18 13:07:11,838 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:12,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:13,646 WARN  L193               SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:07:13,649 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:07:13,657 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:13,837 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 13:07:13,837 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296933905]
[2020-08-18 13:07:13,840 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:07:13,840 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 13:07:13,841 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699314975]
[2020-08-18 13:07:13,847 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 13:07:13,848 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:07:13,862 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 13:07:13,863 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:13,865 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-08-18 13:07:14,342 WARN  L193               SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 13:07:19,358 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 13:07:19,358 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-08-18 13:07:19,360 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 13:07:19,361 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 13:07:19,364 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 13:07:19,397 INFO  L225             Difference]: With dead ends: 1527
[2020-08-18 13:07:19,398 INFO  L226             Difference]: Without dead ends: 1311
[2020-08-18 13:07:19,403 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 13:07:19,426 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-08-18 13:07:19,554 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-08-18 13:07:19,556 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-08-18 13:07:19,563 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-08-18 13:07:19,565 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-08-18 13:07:19,572 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 13:07:19,572 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-08-18 13:07:19,572 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 13:07:19,573 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-08-18 13:07:19,584 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 13:07:19,584 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:19,585 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 13:07:19,585 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 13:07:19,585 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:19,586 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:19,586 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-08-18 13:07:19,586 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:19,587 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847461005]
[2020-08-18 13:07:19,588 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:19,873 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:20,555 WARN  L193               SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:07:20,557 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:07:20,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:20,695 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 13:07:20,695 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847461005]
[2020-08-18 13:07:20,696 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:07:20,696 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 13:07:20,696 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330662490]
[2020-08-18 13:07:20,698 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 13:07:20,699 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:07:20,699 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 13:07:20,699 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:20,700 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-08-18 13:07:21,187 WARN  L193               SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 13:07:25,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 13:07:25,494 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-08-18 13:07:25,494 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 13:07:25,495 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 13:07:25,498 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 13:07:25,514 INFO  L225             Difference]: With dead ends: 2683
[2020-08-18 13:07:25,515 INFO  L226             Difference]: Without dead ends: 2301
[2020-08-18 13:07:25,527 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 13:07:25,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-08-18 13:07:25,656 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-08-18 13:07:25,657 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-08-18 13:07:25,673 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-08-18 13:07:25,674 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-08-18 13:07:25,675 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 13:07:25,676 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-08-18 13:07:25,676 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 13:07:25,676 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-08-18 13:07:25,692 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 13:07:25,694 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:25,698 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 13:07:25,699 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 13:07:25,699 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:25,700 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:25,700 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-08-18 13:07:25,701 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:25,701 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402670541]
[2020-08-18 13:07:25,702 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:26,106 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:26,836 WARN  L193               SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:07:26,838 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:07:26,847 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:27,061 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 13:07:27,061 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402670541]
[2020-08-18 13:07:27,062 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:07:27,063 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 13:07:27,063 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52237342]
[2020-08-18 13:07:27,064 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 13:07:27,065 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:07:27,065 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 13:07:27,066 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:27,067 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-08-18 13:07:27,553 WARN  L193               SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 13:07:31,464 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 13:07:31,464 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-08-18 13:07:31,465 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 13:07:31,465 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 13:07:31,467 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 13:07:31,486 INFO  L225             Difference]: With dead ends: 4867
[2020-08-18 13:07:31,487 INFO  L226             Difference]: Without dead ends: 4201
[2020-08-18 13:07:31,490 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 13:07:31,495 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-08-18 13:07:31,607 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-08-18 13:07:31,607 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-08-18 13:07:31,621 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-08-18 13:07:31,621 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-08-18 13:07:31,622 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 13:07:31,622 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-08-18 13:07:31,622 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 13:07:31,623 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-08-18 13:07:31,632 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 13:07:31,633 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:31,633 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 13:07:31,633 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 13:07:31,633 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:31,634 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:31,634 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-08-18 13:07:31,634 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:31,635 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553846528]
[2020-08-18 13:07:31,635 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:32,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:32,935 WARN  L193               SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:07:32,937 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:07:32,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:33,228 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 13:07:33,229 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553846528]
[2020-08-18 13:07:33,229 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:07:33,229 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 13:07:33,230 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173340120]
[2020-08-18 13:07:33,231 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 13:07:33,231 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:07:33,231 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 13:07:33,232 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 13:07:33,232 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-08-18 13:07:40,227 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 13:07:40,227 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-08-18 13:07:40,228 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 13:07:40,228 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-08-18 13:07:40,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 13:07:40,266 INFO  L225             Difference]: With dead ends: 12414
[2020-08-18 13:07:40,267 INFO  L226             Difference]: Without dead ends: 8230
[2020-08-18 13:07:40,275 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
[2020-08-18 13:07:40,285 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-08-18 13:07:40,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-08-18 13:07:40,585 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-08-18 13:07:40,621 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-08-18 13:07:40,621 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-08-18 13:07:40,622 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 13:07:40,622 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-08-18 13:07:40,622 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 13:07:40,622 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-08-18 13:07:40,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 13:07:40,649 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:40,650 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 13:07:40,650 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 13:07:40,651 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:40,651 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:40,651 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-08-18 13:07:40,651 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:40,652 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855427185]
[2020-08-18 13:07:40,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:40,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:41,367 WARN  L193               SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:07:41,368 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:07:41,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:41,690 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 13:07:41,691 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855427185]
[2020-08-18 13:07:41,691 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:07:41,691 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 13:07:41,692 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281685570]
[2020-08-18 13:07:41,692 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 13:07:41,693 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:07:41,693 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 13:07:41,693 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:41,693 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-08-18 13:07:49,363 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 13:07:49,364 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-08-18 13:07:49,364 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 13:07:49,365 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 13:07:49,365 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 13:07:49,429 INFO  L225             Difference]: With dead ends: 24233
[2020-08-18 13:07:49,429 INFO  L226             Difference]: Without dead ends: 16134
[2020-08-18 13:07:49,445 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:49,463 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-08-18 13:07:49,908 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-08-18 13:07:49,908 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-08-18 13:07:49,939 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-08-18 13:07:49,939 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-08-18 13:07:49,940 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 13:07:49,940 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-08-18 13:07:49,940 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 13:07:49,940 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-08-18 13:07:49,973 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 13:07:49,973 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:49,973 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 13:07:49,974 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 13:07:49,975 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:49,979 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:49,979 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-08-18 13:07:49,979 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:49,980 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85926951]
[2020-08-18 13:07:49,980 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:50,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:50,479 WARN  L193               SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:07:50,480 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:07:50,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:07:50,681 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 13:07:50,682 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85926951]
[2020-08-18 13:07:50,682 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:07:50,682 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 13:07:50,682 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920898483]
[2020-08-18 13:07:50,683 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 13:07:50,683 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:07:50,684 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 13:07:50,684 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:50,684 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.
[2020-08-18 13:07:58,822 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 13:07:58,822 INFO  L93              Difference]: Finished difference Result 48321 states and 74099 transitions.
[2020-08-18 13:07:58,823 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 13:07:58,823 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 13:07:58,823 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 13:07:58,885 INFO  L225             Difference]: With dead ends: 48321
[2020-08-18 13:07:58,886 INFO  L226             Difference]: Without dead ends: 32231
[2020-08-18 13:07:58,915 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:07:58,950 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32231 states.
[2020-08-18 13:07:59,619 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151.
[2020-08-18 13:07:59,619 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16151 states.
[2020-08-18 13:07:59,655 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions.
[2020-08-18 13:07:59,655 INFO  L78                 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332
[2020-08-18 13:07:59,655 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 13:07:59,656 INFO  L479      AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions.
[2020-08-18 13:07:59,656 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 13:07:59,656 INFO  L276                IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions.
[2020-08-18 13:07:59,685 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2020-08-18 13:07:59,685 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 13:07:59,686 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 13:07:59,686 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 13:07:59,686 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 13:07:59,686 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 13:07:59,686 INFO  L82        PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times
[2020-08-18 13:07:59,687 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 13:07:59,687 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308675305]
[2020-08-18 13:07:59,687 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 13:07:59,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:08:00,189 WARN  L193               SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 13:08:00,190 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 13:08:00,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 13:08:00,263 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 13:08:00,264 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308675305]
[2020-08-18 13:08:00,264 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 13:08:00,264 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 13:08:00,264 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633231655]
[2020-08-18 13:08:00,265 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 13:08:00,265 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 13:08:00,265 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 13:08:00,266 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 13:08:00,266 INFO  L87              Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.