/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+lhb-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 18:03:38,415 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 18:03:38,418 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 18:03:38,460 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 18:03:38,460 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 18:03:38,470 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 18:03:38,473 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 18:03:38,477 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 18:03:38,480 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 18:03:38,484 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 18:03:38,484 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 18:03:38,485 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 18:03:38,486 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 18:03:38,488 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 18:03:38,490 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 18:03:38,492 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 18:03:38,493 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 18:03:38,494 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 18:03:38,496 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 18:03:38,503 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 18:03:38,506 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 18:03:38,507 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 18:03:38,507 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 18:03:38,508 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 18:03:38,520 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 18:03:38,520 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 18:03:38,520 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 18:03:38,526 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 18:03:38,527 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 18:03:38,528 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 18:03:38,528 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 18:03:38,531 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 18:03:38,532 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 18:03:38,532 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 18:03:38,533 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 18:03:38,533 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 18:03:38,536 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 18:03:38,536 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 18:03:38,536 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 18:03:38,539 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 18:03:38,540 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 18:03:38,540 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 18:03:38,573 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 18:03:38,573 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 18:03:38,574 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 18:03:38,575 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 18:03:38,575 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 18:03:38,575 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 18:03:38,575 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 18:03:38,575 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 18:03:38,576 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 18:03:38,576 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 18:03:38,576 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 18:03:38,576 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 18:03:38,576 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 18:03:38,576 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 18:03:38,577 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 18:03:38,577 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 18:03:38,577 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 18:03:38,577 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 18:03:38,578 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 18:03:38,578 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 18:03:38,578 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 18:03:38,578 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 18:03:38,578 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 18:03:38,578 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 18:03:38,579 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 18:03:38,579 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 18:03:38,579 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 18:03:38,579 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 18:03:38,579 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 18:03:38,580 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 18:03:38,898 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 18:03:38,911 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 18:03:38,914 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 18:03:38,916 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 18:03:38,916 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 18:03:38,917 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 18:03:38,980 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/662b2b662/2f13c2a2f80143c68394a8fca952eb91/FLAG0ac1f6b73
[2020-08-18 18:03:39,655 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 18:03:39,656 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 18:03:39,678 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/662b2b662/2f13c2a2f80143c68394a8fca952eb91/FLAG0ac1f6b73
[2020-08-18 18:03:39,823 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/662b2b662/2f13c2a2f80143c68394a8fca952eb91
[2020-08-18 18:03:39,834 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 18:03:39,836 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 18:03:39,840 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 18:03:39,840 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 18:03:39,844 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 18:03:39,845 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:03:39" (1/1) ...
[2020-08-18 18:03:39,849 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612194b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:39, skipping insertion in model container
[2020-08-18 18:03:39,849 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:03:39" (1/1) ...
[2020-08-18 18:03:39,859 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 18:03:40,030 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 18:03:41,513 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 18:03:41,536 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 18:03:42,523 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 18:03:42,555 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 18:03:42,555 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42 WrapperNode
[2020-08-18 18:03:42,556 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 18:03:42,557 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 18:03:42,557 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 18:03:42,558 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 18:03:42,576 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,579 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,631 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,632 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,694 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,734 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,743 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (1/1) ...
[2020-08-18 18:03:42,756 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 18:03:42,757 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 18:03:42,757 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 18:03:42,757 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 18:03:42,759 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (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 18:03:42,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 18:03:42,836 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 18:03:42,837 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 18:03:42,837 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 18:03:42,837 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 18:03:42,837 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 18:03:42,838 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 18:03:42,838 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 18:03:42,838 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 18:03:42,838 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 18:03:42,839 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 18:03:42,839 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 18:03:42,839 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 18:03:42,839 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 18:03:42,839 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 18:03:42,840 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 18:03:42,840 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 18:03:42,840 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 18:03:42,840 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 18:03:42,841 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 18:03:42,841 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 18:03:42,841 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 18:03:45,851 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 18:03:45,852 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 18:03:45,865 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:03:45 BoogieIcfgContainer
[2020-08-18 18:03:45,865 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 18:03:45,867 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 18:03:45,867 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 18:03:45,872 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 18:03:45,873 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:03:39" (1/3) ...
[2020-08-18 18:03:45,874 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db04da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:03:45, skipping insertion in model container
[2020-08-18 18:03:45,874 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:03:42" (2/3) ...
[2020-08-18 18:03:45,875 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db04da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:03:45, skipping insertion in model container
[2020-08-18 18:03:45,875 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:03:45" (3/3) ...
[2020-08-18 18:03:45,878 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 18:03:45,890 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 18:03:45,906 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-08-18 18:03:45,923 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-08-18 18:03:45,962 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 18:03:45,962 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 18:03:45,962 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 18:03:45,962 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 18:03:45,962 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 18:03:45,963 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 18:03:45,963 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 18:03:45,963 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 18:03:46,009 INFO  L276                IsEmpty]: Start isEmpty. Operand 1016 states.
[2020-08-18 18:03:46,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 18:03:46,048 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:03:46,049 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:03:46,050 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:03:46,056 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:03:46,057 INFO  L82        PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times
[2020-08-18 18:03:46,066 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:03:46,067 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603730908]
[2020-08-18 18:03:46,067 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:03:46,822 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:03:47,864 WARN  L193               SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 18:03:47,867 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:03:47,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:03:48,093 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 18:03:48,094 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603730908]
[2020-08-18 18:03:48,097 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:03:48,098 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 18:03:48,099 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029978860]
[2020-08-18 18:03:48,111 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:03:48,112 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:03:48,135 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:03:48,136 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:03:48,139 INFO  L87              Difference]: Start difference. First operand 1016 states. Second operand 4 states.
[2020-08-18 18:03:49,059 WARN  L193               SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 18:03:56,406 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:03:56,407 INFO  L93              Difference]: Finished difference Result 1776 states and 3147 transitions.
[2020-08-18 18:03:56,408 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:03:56,409 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-18 18:03:56,411 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:03:56,445 INFO  L225             Difference]: With dead ends: 1776
[2020-08-18 18:03:56,446 INFO  L226             Difference]: Without dead ends: 1481
[2020-08-18 18:03:56,453 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
[2020-08-18 18:03:56,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1481 states.
[2020-08-18 18:03:56,589 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1479.
[2020-08-18 18:03:56,591 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1479 states.
[2020-08-18 18:03:56,599 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2266 transitions.
[2020-08-18 18:03:56,601 INFO  L78                 Accepts]: Start accepts. Automaton has 1479 states and 2266 transitions. Word has length 324
[2020-08-18 18:03:56,602 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:03:56,602 INFO  L479      AbstractCegarLoop]: Abstraction has 1479 states and 2266 transitions.
[2020-08-18 18:03:56,603 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 18:03:56,603 INFO  L276                IsEmpty]: Start isEmpty. Operand 1479 states and 2266 transitions.
[2020-08-18 18:03:56,610 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 18:03:56,610 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:03:56,611 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:03:56,611 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 18:03:56,612 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:03:56,612 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:03:56,612 INFO  L82        PathProgramCache]: Analyzing trace with hash -220420006, now seen corresponding path program 1 times
[2020-08-18 18:03:56,613 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:03:56,613 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879719339]
[2020-08-18 18:03:56,613 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:03:56,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:03:57,711 WARN  L193               SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 18:03:57,714 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:03:57,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:03:58,029 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 18:03:58,029 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879719339]
[2020-08-18 18:03:58,030 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:03:58,031 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 18:03:58,031 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147205570]
[2020-08-18 18:03:58,036 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:03:58,036 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:03:58,037 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:03:58,037 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:03:58,037 INFO  L87              Difference]: Start difference. First operand 1479 states and 2266 transitions. Second operand 4 states.
[2020-08-18 18:03:58,740 WARN  L193               SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 18:04:05,612 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:04:05,613 INFO  L93              Difference]: Finished difference Result 2852 states and 4423 transitions.
[2020-08-18 18:04:05,613 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:04:05,614 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-18 18:04:05,615 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:04:05,629 INFO  L225             Difference]: With dead ends: 2852
[2020-08-18 18:04:05,629 INFO  L226             Difference]: Without dead ends: 2439
[2020-08-18 18:04:05,634 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 18:04:05,639 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2439 states.
[2020-08-18 18:04:05,711 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2437.
[2020-08-18 18:04:05,712 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2437 states.
[2020-08-18 18:04:05,723 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3757 transitions.
[2020-08-18 18:04:05,724 INFO  L78                 Accepts]: Start accepts. Automaton has 2437 states and 3757 transitions. Word has length 324
[2020-08-18 18:04:05,725 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:04:05,725 INFO  L479      AbstractCegarLoop]: Abstraction has 2437 states and 3757 transitions.
[2020-08-18 18:04:05,725 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 18:04:05,725 INFO  L276                IsEmpty]: Start isEmpty. Operand 2437 states and 3757 transitions.
[2020-08-18 18:04:05,739 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 18:04:05,739 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:04:05,740 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:04:05,740 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 18:04:05,741 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:04:05,741 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:04:05,741 INFO  L82        PathProgramCache]: Analyzing trace with hash -578874774, now seen corresponding path program 1 times
[2020-08-18 18:04:05,742 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:04:05,742 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634023506]
[2020-08-18 18:04:05,742 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:04:06,164 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:04:06,987 WARN  L193               SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 18:04:06,988 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:04:07,001 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:04:07,226 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 18:04:07,227 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634023506]
[2020-08-18 18:04:07,228 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:04:07,229 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 18:04:07,229 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459054714]
[2020-08-18 18:04:07,230 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 18:04:07,232 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:04:07,233 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 18:04:07,234 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 18:04:07,235 INFO  L87              Difference]: Start difference. First operand 2437 states and 3757 transitions. Second operand 5 states.
[2020-08-18 18:04:16,685 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:04:16,685 INFO  L93              Difference]: Finished difference Result 7199 states and 11086 transitions.
[2020-08-18 18:04:16,686 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:04:16,686 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 324
[2020-08-18 18:04:16,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:04:16,712 INFO  L225             Difference]: With dead ends: 7199
[2020-08-18 18:04:16,713 INFO  L226             Difference]: Without dead ends: 4777
[2020-08-18 18:04:16,719 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 18:04:16,726 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4777 states.
[2020-08-18 18:04:16,883 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4653.
[2020-08-18 18:04:16,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4653 states.
[2020-08-18 18:04:16,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions.
[2020-08-18 18:04:16,899 INFO  L78                 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 324
[2020-08-18 18:04:16,899 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:04:16,899 INFO  L479      AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions.
[2020-08-18 18:04:16,899 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 18:04:16,900 INFO  L276                IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions.
[2020-08-18 18:04:16,913 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-18 18:04:16,913 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:04:16,914 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:04:16,914 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 18:04:16,917 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:04:16,918 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:04:16,918 INFO  L82        PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times
[2020-08-18 18:04:16,919 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:04:16,919 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111899315]
[2020-08-18 18:04:16,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:04:17,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:04:17,680 WARN  L193               SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 18:04:17,681 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:04:17,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:04:17,859 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 18:04:17,860 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111899315]
[2020-08-18 18:04:17,860 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:04:17,860 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 18:04:17,860 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097908795]
[2020-08-18 18:04:17,861 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:04:17,861 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:04:17,861 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:04:17,862 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:04:17,862 INFO  L87              Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 4 states.
[2020-08-18 18:04:28,298 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:04:28,299 INFO  L93              Difference]: Finished difference Result 13649 states and 20959 transitions.
[2020-08-18 18:04:28,299 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 18:04:28,299 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-18 18:04:28,300 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:04:28,338 INFO  L225             Difference]: With dead ends: 13649
[2020-08-18 18:04:28,338 INFO  L226             Difference]: Without dead ends: 9125
[2020-08-18 18:04:28,349 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:04:28,359 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9125 states.
[2020-08-18 18:04:28,613 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001.
[2020-08-18 18:04:28,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9001 states.
[2020-08-18 18:04:28,629 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions.
[2020-08-18 18:04:28,630 INFO  L78                 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326
[2020-08-18 18:04:28,630 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:04:28,630 INFO  L479      AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions.
[2020-08-18 18:04:28,630 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 18:04:28,630 INFO  L276                IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions.
[2020-08-18 18:04:28,648 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-18 18:04:28,648 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:04:28,649 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:04:28,649 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 18:04:28,650 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:04:28,651 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:04:28,651 INFO  L82        PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times
[2020-08-18 18:04:28,651 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:04:28,652 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383997963]
[2020-08-18 18:04:28,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:04:28,709 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:04:29,336 WARN  L193               SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 18:04:29,337 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:04:29,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:04:29,501 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 18:04:29,502 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383997963]
[2020-08-18 18:04:29,502 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:04:29,502 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 18:04:29,503 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113021311]
[2020-08-18 18:04:29,503 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:04:29,504 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:04:29,504 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:04:29,504 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:04:29,504 INFO  L87              Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 4 states.