/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-19 03:44:41,843 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-19 03:44:41,846 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-19 03:44:41,884 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-19 03:44:41,885 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-19 03:44:41,894 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-19 03:44:41,896 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-19 03:44:41,899 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-19 03:44:41,902 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-19 03:44:41,905 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-19 03:44:41,906 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-19 03:44:41,907 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-19 03:44:41,907 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-19 03:44:41,910 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-19 03:44:41,912 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-19 03:44:41,914 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-19 03:44:41,915 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-19 03:44:41,917 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-19 03:44:41,918 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-19 03:44:41,926 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-19 03:44:41,928 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-19 03:44:41,929 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-19 03:44:41,930 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-19 03:44:41,931 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-19 03:44:41,943 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-19 03:44:41,943 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-19 03:44:41,943 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-19 03:44:41,950 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-19 03:44:41,951 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-19 03:44:41,952 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-19 03:44:41,952 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-19 03:44:41,953 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-19 03:44:41,955 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-19 03:44:41,956 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-19 03:44:41,960 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-19 03:44:41,960 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-19 03:44:41,961 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-19 03:44:41,961 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-19 03:44:41,961 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-19 03:44:41,962 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-19 03:44:41,965 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
[2020-08-19 03:44:42,000 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-19 03:44:42,000 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-19 03:44:42,002 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-19 03:44:42,002 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-19 03:44:42,002 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-19 03:44:42,002 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-19 03:44:42,002 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-19 03:44:42,003 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-19 03:44:42,003 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-19 03:44:42,003 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-19 03:44:42,003 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-19 03:44:42,003 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-19 03:44:42,004 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-19 03:44:42,004 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-19 03:44:42,004 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-19 03:44:42,004 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-19 03:44:42,004 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-19 03:44:42,005 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-19 03:44:42,005 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-19 03:44:42,005 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-19 03:44:42,005 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-19 03:44:42,005 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-19 03:44:42,006 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-19 03:44:42,006 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-19 03:44:42,006 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-19 03:44:42,006 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-19 03:44:42,006 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-19 03:44:42,007 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-19 03:44:42,007 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-19 03:44:42,007 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=SMALLESTAMONGWIDE;tolerance=0.1;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;
[2020-08-19 03:44:42,280 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-19 03:44:42,292 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-19 03:44:42,295 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-19 03:44:42,297 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-19 03:44:42,298 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-19 03:44:42,299 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-19 03:44:42,370 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4c2cdb59/b57f778a8bac4543a7a6339cfa83c0fa/FLAG2b1858ce1
[2020-08-19 03:44:43,007 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-19 03:44:43,007 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-19 03:44:43,034 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4c2cdb59/b57f778a8bac4543a7a6339cfa83c0fa/FLAG2b1858ce1
[2020-08-19 03:44:43,151 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4c2cdb59/b57f778a8bac4543a7a6339cfa83c0fa
[2020-08-19 03:44:43,159 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-19 03:44:43,160 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-19 03:44:43,161 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-19 03:44:43,162 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-19 03:44:43,165 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-19 03:44:43,166 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:44:43" (1/1) ...
[2020-08-19 03:44:43,169 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e093328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:43, skipping insertion in model container
[2020-08-19 03:44:43,169 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:44:43" (1/1) ...
[2020-08-19 03:44:43,178 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-19 03:44:43,348 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-19 03:44:44,690 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 03:44:44,716 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-19 03:44:45,686 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 03:44:45,724 INFO  L208         MainTranslator]: Completed translation
[2020-08-19 03:44:45,726 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45 WrapperNode
[2020-08-19 03:44:45,726 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-19 03:44:45,727 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-19 03:44:45,727 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-19 03:44:45,727 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-19 03:44:45,742 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,744 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,803 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,804 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,877 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,927 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,941 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (1/1) ...
[2020-08-19 03:44:45,960 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-19 03:44:45,961 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-19 03:44:45,961 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-19 03:44:45,961 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-19 03:44:45,962 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (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
[2020-08-19 03:44:46,041 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-19 03:44:46,041 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-19 03:44:46,041 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-19 03:44:46,042 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-19 03:44:46,042 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-19 03:44:46,042 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-19 03:44:46,042 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-19 03:44:46,043 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-19 03:44:46,043 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-19 03:44:46,043 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-19 03:44:46,043 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-19 03:44:46,044 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-19 03:44:46,044 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-19 03:44:46,044 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-19 03:44:46,044 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-19 03:44:46,044 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-19 03:44:46,045 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-19 03:44:46,045 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-08-19 03:44:46,045 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-19 03:44:46,046 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-19 03:44:46,046 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-19 03:44:46,046 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-19 03:44:46,046 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-19 03:44:49,565 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-19 03:44:49,565 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-19 03:44:49,577 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:44:49 BoogieIcfgContainer
[2020-08-19 03:44:49,577 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-19 03:44:49,578 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-19 03:44:49,579 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-19 03:44:49,582 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-19 03:44:49,582 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:44:43" (1/3) ...
[2020-08-19 03:44:49,583 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7759b3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:44:49, skipping insertion in model container
[2020-08-19 03:44:49,583 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:44:45" (2/3) ...
[2020-08-19 03:44:49,584 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7759b3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:44:49, skipping insertion in model container
[2020-08-19 03:44:49,584 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:44:49" (3/3) ...
[2020-08-19 03:44:49,586 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-19 03:44:49,596 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-19 03:44:49,606 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-19 03:44:49,620 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-19 03:44:49,649 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-19 03:44:49,650 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-19 03:44:49,650 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-19 03:44:49,650 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-19 03:44:49,650 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-19 03:44:49,650 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-19 03:44:49,650 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-19 03:44:49,650 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-19 03:44:49,690 INFO  L276                IsEmpty]: Start isEmpty. Operand 1340 states.
[2020-08-19 03:44:49,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 477
[2020-08-19 03:44:49,743 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 03:44:49,744 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 03:44:49,745 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 03:44:49,751 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 03:44:49,752 INFO  L82        PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times
[2020-08-19 03:44:49,761 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 03:44:49,761 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495890146]
[2020-08-19 03:44:49,762 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 03:44:50,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:44:52,617 WARN  L193               SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 382
[2020-08-19 03:44:52,619 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 03:44:52,627 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:44:52,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 03:44:52,956 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495890146]
[2020-08-19 03:44:52,958 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 03:44:52,959 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 03:44:52,960 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165732028]
[2020-08-19 03:44:52,966 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 03:44:52,966 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 03:44:52,979 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 03:44:52,980 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 03:44:52,982 INFO  L87              Difference]: Start difference. First operand 1340 states. Second operand 4 states.
[2020-08-19 03:44:53,849 WARN  L193               SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 383
[2020-08-19 03:45:02,994 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 03:45:02,995 INFO  L93              Difference]: Finished difference Result 2262 states and 4032 transitions.
[2020-08-19 03:45:02,995 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 03:45:02,997 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 476
[2020-08-19 03:45:03,000 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 03:45:03,032 INFO  L225             Difference]: With dead ends: 2262
[2020-08-19 03:45:03,033 INFO  L226             Difference]: Without dead ends: 1993
[2020-08-19 03:45:03,039 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-19 03:45:03,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1993 states.
[2020-08-19 03:45:03,210 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991.
[2020-08-19 03:45:03,211 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1991 states.
[2020-08-19 03:45:03,222 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions.
[2020-08-19 03:45:03,224 INFO  L78                 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476
[2020-08-19 03:45:03,231 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 03:45:03,231 INFO  L479      AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions.
[2020-08-19 03:45:03,231 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 03:45:03,231 INFO  L276                IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions.
[2020-08-19 03:45:03,248 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 477
[2020-08-19 03:45:03,249 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 03:45:03,249 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 03:45:03,250 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-19 03:45:03,250 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 03:45:03,251 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 03:45:03,252 INFO  L82        PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times
[2020-08-19 03:45:03,252 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 03:45:03,253 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258338683]
[2020-08-19 03:45:03,253 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 03:45:04,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:45:05,425 WARN  L193               SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 382
[2020-08-19 03:45:05,427 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 03:45:05,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:45:05,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 03:45:05,750 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258338683]
[2020-08-19 03:45:05,750 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 03:45:05,750 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-19 03:45:05,751 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084286412]
[2020-08-19 03:45:05,753 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-19 03:45:05,753 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 03:45:05,753 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-19 03:45:05,754 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-19 03:45:05,754 INFO  L87              Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states.
[2020-08-19 03:45:19,851 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 03:45:19,852 INFO  L93              Difference]: Finished difference Result 5904 states and 9579 transitions.
[2020-08-19 03:45:19,857 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 03:45:19,857 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 476
[2020-08-19 03:45:19,858 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 03:45:19,878 INFO  L225             Difference]: With dead ends: 5904
[2020-08-19 03:45:19,878 INFO  L226             Difference]: Without dead ends: 3930
[2020-08-19 03:45:19,884 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
[2020-08-19 03:45:19,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3930 states.
[2020-08-19 03:45:20,045 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928.
[2020-08-19 03:45:20,046 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3928 states.
[2020-08-19 03:45:20,059 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions.
[2020-08-19 03:45:20,059 INFO  L78                 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476
[2020-08-19 03:45:20,060 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 03:45:20,060 INFO  L479      AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions.
[2020-08-19 03:45:20,060 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-19 03:45:20,060 INFO  L276                IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions.
[2020-08-19 03:45:20,078 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 479
[2020-08-19 03:45:20,081 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 03:45:20,082 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 03:45:20,083 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-19 03:45:20,083 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 03:45:20,084 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 03:45:20,084 INFO  L82        PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times
[2020-08-19 03:45:20,085 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 03:45:20,086 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328305927]
[2020-08-19 03:45:20,086 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 03:45:20,374 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:45:21,379 WARN  L193               SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 382
[2020-08-19 03:45:21,381 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 03:45:21,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:45:21,693 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 03:45:21,693 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328305927]
[2020-08-19 03:45:21,694 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 03:45:21,694 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 03:45:21,694 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139596379]
[2020-08-19 03:45:21,695 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 03:45:21,695 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 03:45:21,695 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 03:45:21,696 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 03:45:21,696 INFO  L87              Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states.
[2020-08-19 03:45:37,828 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 03:45:37,828 INFO  L93              Difference]: Finished difference Result 11482 states and 18513 transitions.
[2020-08-19 03:45:37,829 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-19 03:45:37,829 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 478
[2020-08-19 03:45:37,830 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 03:45:37,864 INFO  L225             Difference]: With dead ends: 11482
[2020-08-19 03:45:37,864 INFO  L226             Difference]: Without dead ends: 7768
[2020-08-19 03:45:37,873 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 03:45:37,883 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7768 states.
[2020-08-19 03:45:38,115 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766.
[2020-08-19 03:45:38,116 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7766 states.
[2020-08-19 03:45:38,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions.
[2020-08-19 03:45:38,144 INFO  L78                 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478
[2020-08-19 03:45:38,144 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 03:45:38,144 INFO  L479      AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions.
[2020-08-19 03:45:38,144 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 03:45:38,145 INFO  L276                IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions.
[2020-08-19 03:45:38,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 480
[2020-08-19 03:45:38,170 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 03:45:38,171 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 03:45:38,171 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-19 03:45:38,171 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 03:45:38,172 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 03:45:38,172 INFO  L82        PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times
[2020-08-19 03:45:38,173 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 03:45:38,174 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386877935]
[2020-08-19 03:45:38,174 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 03:45:38,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:45:39,025 WARN  L193               SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 382
[2020-08-19 03:45:39,026 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 03:45:39,041 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 03:45:39,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 03:45:39,239 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386877935]
[2020-08-19 03:45:39,239 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 03:45:39,239 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 03:45:39,240 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293303678]
[2020-08-19 03:45:39,241 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 03:45:39,241 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 03:45:39,241 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 03:45:39,241 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 03:45:39,241 INFO  L87              Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states.