/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698
[2020-08-21 21:32:42,163 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 21:32:42,167 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 21:32:42,208 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 21:32:42,208 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 21:32:42,221 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 21:32:42,222 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 21:32:42,225 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 21:32:42,228 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 21:32:42,229 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-08-21 21:32:42,232 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 21:32:42,233 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 21:32:42,237 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 21:32:42,240 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 21:32:42,241 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 21:32:42,243 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 21:32:42,245 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 21:32:42,247 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 21:32:42,253 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 21:32:42,257 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 21:32:42,258 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 21:32:42,259 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 21:32:42,259 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 21:32:42,264 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 21:32:42,264 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 21:32:42,264 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 21:32:42,268 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 21:32:42,268 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 21:32:42,269 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 21:32:42,269 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 21:32:42,270 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 21:32:42,271 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 21:32:42,271 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 21:32:42,272 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 21:32:42,273 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 21:32:42,273 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 21:32:42,273 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 21:32:42,274 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 21:32:42,276 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 21:32:42,277 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
[2020-08-21 21:32:42,319 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 21:32:42,320 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 21:32:42,322 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 21:32:42,322 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 21:32:42,322 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 21:32:42,323 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 21:32:42,323 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 21:32:42,323 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 21:32:42,324 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 21:32:42,324 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 21:32:42,325 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 21:32:42,325 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 21:32:42,325 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 21:32:42,326 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 21:32:42,326 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 21:32:42,326 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 21:32:42,326 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 21:32:42,327 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 21:32:42,327 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 21:32:42,327 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 21:32:42,327 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 21:32:42,327 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 21:32:42,328 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 21:32:42,328 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 21:32:42,328 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 21:32:42,328 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 21:32:42,328 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 21:32:42,329 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 21:32:42,329 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 21:32:42,329 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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;
[2020-08-21 21:32:42,674 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 21:32:42,687 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 21:32:42,690 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 21:32:42,692 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 21:32:42,692 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 21:32:42,693 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 21:32:42,757 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/928329691/56bd0b33068f4516a7b6c234475a096d/FLAG111e127cb
[2020-08-21 21:32:43,426 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 21:32:43,427 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 21:32:43,451 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/928329691/56bd0b33068f4516a7b6c234475a096d/FLAG111e127cb
[2020-08-21 21:32:43,547 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/928329691/56bd0b33068f4516a7b6c234475a096d
[2020-08-21 21:32:43,556 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 21:32:43,558 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 21:32:43,559 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 21:32:43,559 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 21:32:43,563 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 21:32:43,564 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:32:43" (1/1) ...
[2020-08-21 21:32:43,567 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52df6c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:43, skipping insertion in model container
[2020-08-21 21:32:43,567 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:32:43" (1/1) ...
[2020-08-21 21:32:43,574 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 21:32:43,726 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 21:32:45,218 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 21:32:45,231 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 21:32:46,862 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 21:32:46,905 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 21:32:46,908 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46 WrapperNode
[2020-08-21 21:32:46,908 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 21:32:46,909 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 21:32:46,909 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 21:32:46,909 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 21:32:46,931 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:46,933 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:46,991 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:46,992 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:47,059 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:47,097 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:47,109 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (1/1) ...
[2020-08-21 21:32:47,123 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 21:32:47,123 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 21:32:47,123 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 21:32:47,124 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 21:32:47,125 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (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
[2020-08-21 21:32:47,202 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 21:32:47,202 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 21:32:47,203 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-21 21:32:47,204 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 21:32:47,204 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 21:32:47,204 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-21 21:32:47,205 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-21 21:32:47,205 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-21 21:32:47,205 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-21 21:32:47,206 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 21:32:47,207 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-21 21:32:47,207 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-21 21:32:47,207 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-21 21:32:47,207 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-21 21:32:47,208 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-21 21:32:47,208 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-21 21:32:47,209 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-21 21:32:47,209 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-21 21:32:47,209 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-21 21:32:47,210 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 21:32:47,210 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 21:32:47,210 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 21:32:50,441 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 21:32:50,441 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 21:32:50,460 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:32:50 BoogieIcfgContainer
[2020-08-21 21:32:50,461 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 21:32:50,463 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 21:32:50,463 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 21:32:50,467 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 21:32:50,468 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:32:43" (1/3) ...
[2020-08-21 21:32:50,469 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a17114a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:32:50, skipping insertion in model container
[2020-08-21 21:32:50,469 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:32:46" (2/3) ...
[2020-08-21 21:32:50,470 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a17114a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:32:50, skipping insertion in model container
[2020-08-21 21:32:50,470 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:32:50" (3/3) ...
[2020-08-21 21:32:50,472 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 21:32:50,485 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 21:32:50,499 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-08-21 21:32:50,516 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-08-21 21:32:50,553 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 21:32:50,554 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 21:32:50,554 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 21:32:50,554 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 21:32:50,554 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 21:32:50,555 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 21:32:50,555 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 21:32:50,555 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 21:32:50,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 1016 states.
[2020-08-21 21:32:50,642 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 21:32:50,643 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 21:32:50,644 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]
[2020-08-21 21:32:50,645 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]===
[2020-08-21 21:32:50,651 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:32:50,652 INFO  L82        PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times
[2020-08-21 21:32:50,661 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:32:50,661 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019968896]
[2020-08-21 21:32:50,662 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:32:51,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:32:52,780 WARN  L193               SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 21:32:52,782 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:32:52,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:32:53,008 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:32:53,009 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019968896]
[2020-08-21 21:32:53,011 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:32:53,011 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 21:32:53,012 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592844570]
[2020-08-21 21:32:53,018 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 21:32:53,018 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:32:53,036 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 21:32:53,037 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 21:32:53,041 INFO  L87              Difference]: Start difference. First operand 1016 states. Second operand 4 states.
[2020-08-21 21:32:53,688 WARN  L193               SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-21 21:33:01,203 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:33:01,204 INFO  L93              Difference]: Finished difference Result 1776 states and 3147 transitions.
[2020-08-21 21:33:01,204 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 21:33:01,206 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-21 21:33:01,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:33:01,234 INFO  L225             Difference]: With dead ends: 1776
[2020-08-21 21:33:01,234 INFO  L226             Difference]: Without dead ends: 1481
[2020-08-21 21:33:01,241 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
[2020-08-21 21:33:01,264 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1481 states.
[2020-08-21 21:33:01,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1479.
[2020-08-21 21:33:01,395 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1479 states.
[2020-08-21 21:33:01,402 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2266 transitions.
[2020-08-21 21:33:01,405 INFO  L78                 Accepts]: Start accepts. Automaton has 1479 states and 2266 transitions. Word has length 324
[2020-08-21 21:33:01,410 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:33:01,410 INFO  L479      AbstractCegarLoop]: Abstraction has 1479 states and 2266 transitions.
[2020-08-21 21:33:01,411 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 21:33:01,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 1479 states and 2266 transitions.
[2020-08-21 21:33:01,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 21:33:01,423 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 21:33:01,423 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]
[2020-08-21 21:33:01,424 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 21:33:01,424 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]===
[2020-08-21 21:33:01,425 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:33:01,425 INFO  L82        PathProgramCache]: Analyzing trace with hash -220420006, now seen corresponding path program 1 times
[2020-08-21 21:33:01,425 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:33:01,426 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873186737]
[2020-08-21 21:33:01,426 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:33:01,733 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:02,756 WARN  L193               SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 21:33:02,759 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:33:02,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:03,054 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:33:03,055 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873186737]
[2020-08-21 21:33:03,055 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:33:03,056 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 21:33:03,056 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301863786]
[2020-08-21 21:33:03,061 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 21:33:03,062 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:33:03,062 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 21:33:03,062 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 21:33:03,063 INFO  L87              Difference]: Start difference. First operand 1479 states and 2266 transitions. Second operand 4 states.
[2020-08-21 21:33:03,945 WARN  L193               SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-21 21:33:11,449 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:33:11,450 INFO  L93              Difference]: Finished difference Result 2852 states and 4423 transitions.
[2020-08-21 21:33:11,454 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 21:33:11,455 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-21 21:33:11,457 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:33:11,479 INFO  L225             Difference]: With dead ends: 2852
[2020-08-21 21:33:11,480 INFO  L226             Difference]: Without dead ends: 2439
[2020-08-21 21:33:11,487 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-21 21:33:11,495 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2439 states.
[2020-08-21 21:33:11,597 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2437.
[2020-08-21 21:33:11,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2437 states.
[2020-08-21 21:33:11,619 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3757 transitions.
[2020-08-21 21:33:11,619 INFO  L78                 Accepts]: Start accepts. Automaton has 2437 states and 3757 transitions. Word has length 324
[2020-08-21 21:33:11,620 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:33:11,621 INFO  L479      AbstractCegarLoop]: Abstraction has 2437 states and 3757 transitions.
[2020-08-21 21:33:11,621 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 21:33:11,621 INFO  L276                IsEmpty]: Start isEmpty. Operand 2437 states and 3757 transitions.
[2020-08-21 21:33:11,638 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 21:33:11,646 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 21:33:11,650 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:33:11,651 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 21:33:11,652 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]===
[2020-08-21 21:33:11,652 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:33:11,652 INFO  L82        PathProgramCache]: Analyzing trace with hash -578874774, now seen corresponding path program 1 times
[2020-08-21 21:33:11,653 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:33:11,653 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452564436]
[2020-08-21 21:33:11,659 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:33:12,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:12,859 WARN  L193               SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 21:33:12,861 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:33:12,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:13,213 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:33:13,214 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452564436]
[2020-08-21 21:33:13,214 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:33:13,215 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 21:33:13,215 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074563832]
[2020-08-21 21:33:13,216 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 21:33:13,216 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:33:13,216 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 21:33:13,217 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 21:33:13,217 INFO  L87              Difference]: Start difference. First operand 2437 states and 3757 transitions. Second operand 5 states.
[2020-08-21 21:33:22,804 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:33:22,804 INFO  L93              Difference]: Finished difference Result 7199 states and 11086 transitions.
[2020-08-21 21:33:22,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 21:33:22,805 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 324
[2020-08-21 21:33:22,805 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:33:22,829 INFO  L225             Difference]: With dead ends: 7199
[2020-08-21 21:33:22,829 INFO  L226             Difference]: Without dead ends: 4777
[2020-08-21 21:33:22,835 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 21:33:22,842 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4777 states.
[2020-08-21 21:33:22,999 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4653.
[2020-08-21 21:33:22,999 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4653 states.
[2020-08-21 21:33:23,014 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions.
[2020-08-21 21:33:23,014 INFO  L78                 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 324
[2020-08-21 21:33:23,015 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:33:23,015 INFO  L479      AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions.
[2020-08-21 21:33:23,015 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 21:33:23,015 INFO  L276                IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions.
[2020-08-21 21:33:23,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-21 21:33:23,040 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 21:33:23,041 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]
[2020-08-21 21:33:23,042 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 21:33:23,044 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]===
[2020-08-21 21:33:23,045 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:33:23,045 INFO  L82        PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times
[2020-08-21 21:33:23,046 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:33:23,047 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008107263]
[2020-08-21 21:33:23,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:33:23,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:24,074 WARN  L193               SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 21:33:24,077 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:33:24,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:24,287 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:33:24,287 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008107263]
[2020-08-21 21:33:24,288 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:33:24,288 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 21:33:24,290 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742120716]
[2020-08-21 21:33:24,291 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 21:33:24,291 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:33:24,291 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 21:33:24,292 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 21:33:24,292 INFO  L87              Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 4 states.
[2020-08-21 21:33:34,575 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:33:34,576 INFO  L93              Difference]: Finished difference Result 13649 states and 20959 transitions.
[2020-08-21 21:33:34,577 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 21:33:34,577 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-21 21:33:34,578 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:33:34,618 INFO  L225             Difference]: With dead ends: 13649
[2020-08-21 21:33:34,618 INFO  L226             Difference]: Without dead ends: 9125
[2020-08-21 21:33:34,627 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
[2020-08-21 21:33:34,638 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9125 states.
[2020-08-21 21:33:34,898 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001.
[2020-08-21 21:33:34,898 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9001 states.
[2020-08-21 21:33:34,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions.
[2020-08-21 21:33:34,917 INFO  L78                 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326
[2020-08-21 21:33:34,917 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:33:34,917 INFO  L479      AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions.
[2020-08-21 21:33:34,918 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 21:33:34,918 INFO  L276                IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions.
[2020-08-21 21:33:34,936 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-21 21:33:34,936 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 21:33:34,937 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]
[2020-08-21 21:33:34,937 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 21:33:34,938 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]===
[2020-08-21 21:33:34,939 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:33:34,939 INFO  L82        PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times
[2020-08-21 21:33:34,939 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:33:34,939 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386326240]
[2020-08-21 21:33:34,940 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:33:34,993 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:35,551 WARN  L193               SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-21 21:33:35,553 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:33:35,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:33:35,666 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:33:35,667 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386326240]
[2020-08-21 21:33:35,667 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:33:35,668 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 21:33:35,668 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662768086]
[2020-08-21 21:33:35,668 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 21:33:35,669 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:33:35,669 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 21:33:35,669 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 21:33:35,669 INFO  L87              Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 4 states.