/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 19:40:35,344 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 19:40:35,347 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 19:40:35,371 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 19:40:35,371 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 19:40:35,372 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 19:40:35,374 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 19:40:35,376 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 19:40:35,377 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 19:40:35,378 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 19:40:35,379 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 19:40:35,380 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 19:40:35,380 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 19:40:35,381 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 19:40:35,382 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 19:40:35,383 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 19:40:35,384 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 19:40:35,385 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 19:40:35,386 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 19:40:35,388 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 19:40:35,389 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 19:40:35,390 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 19:40:35,391 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 19:40:35,392 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 19:40:35,395 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 19:40:35,395 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 19:40:35,395 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 19:40:35,396 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 19:40:35,396 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 19:40:35,397 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 19:40:35,397 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 19:40:35,398 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 19:40:35,399 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 19:40:35,400 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 19:40:35,401 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 19:40:35,401 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 19:40:35,401 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-08-18 19:40:35,402 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 19:40:35,403 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 19:40:35,404 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-18 19:40:35,437 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 19:40:35,437 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 19:40:35,438 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 19:40:35,439 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 19:40:35,439 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 19:40:35,439 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 19:40:35,439 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 19:40:35,440 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 19:40:35,440 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 19:40:35,440 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 19:40:35,440 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 19:40:35,440 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 19:40:35,440 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 19:40:35,441 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 19:40:35,441 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 19:40:35,441 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 19:40:35,441 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 19:40:35,441 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 19:40:35,442 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 19:40:35,442 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 19:40:35,442 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 19:40:35,442 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 19:40:35,442 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 19:40:35,443 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 19:40:35,443 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 19:40:35,443 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 19:40:35,443 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 19:40:35,443 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 19:40:35,443 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 19:40:35,444 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=HIGHLEXORDER;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER;
[2020-08-18 19:40:35,779 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 19:40:35,790 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 19:40:35,794 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 19:40:35,795 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 19:40:35,796 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 19:40:35,797 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 19:40:35,859 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f67ba28c/b11b41b51ced404888a3f57a70b461ed/FLAG9324f01e8
[2020-08-18 19:40:36,531 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 19:40:36,534 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 19:40:36,559 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f67ba28c/b11b41b51ced404888a3f57a70b461ed/FLAG9324f01e8
[2020-08-18 19:40:36,654 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f67ba28c/b11b41b51ced404888a3f57a70b461ed
[2020-08-18 19:40:36,663 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 19:40:36,665 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 19:40:36,666 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 19:40:36,667 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 19:40:36,670 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 19:40:36,671 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:40:36" (1/1) ...
[2020-08-18 19:40:36,674 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:36, skipping insertion in model container
[2020-08-18 19:40:36,674 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:40:36" (1/1) ...
[2020-08-18 19:40:36,682 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 19:40:36,847 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 19:40:38,356 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 19:40:38,381 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 19:40:39,738 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 19:40:39,766 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 19:40:39,768 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39 WrapperNode
[2020-08-18 19:40:39,768 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 19:40:39,769 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 19:40:39,769 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 19:40:39,769 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 19:40:39,784 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:39,786 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:39,839 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:39,839 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:39,940 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:39,989 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:40,002 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
[2020-08-18 19:40:40,018 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 19:40:40,019 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 19:40:40,019 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 19:40:40,019 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 19:40:40,021 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 19:40:40,095 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 19:40:40,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 19:40:40,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 19:40:40,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 19:40:40,097 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 19:40:40,097 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 19:40:40,097 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 19:40:40,097 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 19:40:40,098 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 19:40:40,098 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 19:40:40,098 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 19:40:40,098 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 19:40:40,098 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 19:40:40,099 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 19:40:40,099 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 19:40:40,099 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 19:40:40,099 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 19:40:40,099 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 19:40:40,100 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 19:40:40,100 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 19:40:40,100 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 19:40:40,100 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 19:40:43,451 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 19:40:43,451 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 19:40:43,463 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:40:43 BoogieIcfgContainer
[2020-08-18 19:40:43,463 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 19:40:43,465 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 19:40:43,465 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 19:40:43,468 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 19:40:43,468 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:40:36" (1/3) ...
[2020-08-18 19:40:43,469 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78be121b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:40:43, skipping insertion in model container
[2020-08-18 19:40:43,469 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:40:39" (2/3) ...
[2020-08-18 19:40:43,469 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78be121b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:40:43, skipping insertion in model container
[2020-08-18 19:40:43,470 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:40:43" (3/3) ...
[2020-08-18 19:40:43,471 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 19:40:43,482 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 19:40:43,492 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-08-18 19:40:43,507 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-08-18 19:40:43,539 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 19:40:43,539 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 19:40:43,540 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 19:40:43,540 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 19:40:43,540 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 19:40:43,540 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 19:40:43,541 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 19:40:43,541 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 19:40:43,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 1027 states.
[2020-08-18 19:40:43,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 19:40:43,624 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 19:40:43,625 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 19:40:43,626 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 19:40:43,633 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 19:40:43,634 INFO  L82        PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times
[2020-08-18 19:40:43,646 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 19:40:43,646 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324371049]
[2020-08-18 19:40:43,647 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 19:40:44,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:40:45,407 WARN  L193               SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 19:40:45,409 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 19:40:45,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:40:45,608 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 19:40:45,609 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324371049]
[2020-08-18 19:40:45,611 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 19:40:45,612 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 19:40:45,613 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655082864]
[2020-08-18 19:40:45,619 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 19:40:45,620 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 19:40:45,633 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 19:40:45,633 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 19:40:45,635 INFO  L87              Difference]: Start difference. First operand 1027 states. Second operand 4 states.
[2020-08-18 19:40:46,291 WARN  L193               SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 19:40:53,852 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 19:40:53,853 INFO  L93              Difference]: Finished difference Result 1794 states and 3183 transitions.
[2020-08-18 19:40:53,854 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 19:40:53,855 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 19:40:53,857 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 19:40:53,890 INFO  L225             Difference]: With dead ends: 1794
[2020-08-18 19:40:53,890 INFO  L226             Difference]: Without dead ends: 1483
[2020-08-18 19:40:53,897 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 19:40:53,920 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1483 states.
[2020-08-18 19:40:54,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481.
[2020-08-18 19:40:54,028 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1481 states.
[2020-08-18 19:40:54,036 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions.
[2020-08-18 19:40:54,038 INFO  L78                 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327
[2020-08-18 19:40:54,040 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 19:40:54,040 INFO  L479      AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions.
[2020-08-18 19:40:54,040 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 19:40:54,040 INFO  L276                IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions.
[2020-08-18 19:40:54,046 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 19:40:54,046 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 19:40:54,047 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 19:40:54,047 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 19:40:54,048 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 19:40:54,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 19:40:54,048 INFO  L82        PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times
[2020-08-18 19:40:54,049 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 19:40:54,049 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952777769]
[2020-08-18 19:40:54,049 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 19:40:54,331 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:40:55,195 WARN  L193               SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 19:40:55,198 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 19:40:55,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:40:55,501 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 19:40:55,501 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952777769]
[2020-08-18 19:40:55,502 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 19:40:55,502 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 19:40:55,502 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513911844]
[2020-08-18 19:40:55,506 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 19:40:55,506 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 19:40:55,507 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 19:40:55,507 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 19:40:55,507 INFO  L87              Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 4 states.
[2020-08-18 19:40:56,285 WARN  L193               SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 19:41:02,717 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 19:41:02,718 INFO  L93              Difference]: Finished difference Result 2844 states and 4401 transitions.
[2020-08-18 19:41:02,718 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 19:41:02,719 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 19:41:02,720 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 19:41:02,733 INFO  L225             Difference]: With dead ends: 2844
[2020-08-18 19:41:02,734 INFO  L226             Difference]: Without dead ends: 2425
[2020-08-18 19:41:02,738 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 19:41:02,744 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2425 states.
[2020-08-18 19:41:02,821 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2423.
[2020-08-18 19:41:02,822 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2423 states.
[2020-08-18 19:41:02,833 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3727 transitions.
[2020-08-18 19:41:02,834 INFO  L78                 Accepts]: Start accepts. Automaton has 2423 states and 3727 transitions. Word has length 327
[2020-08-18 19:41:02,835 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 19:41:02,835 INFO  L479      AbstractCegarLoop]: Abstraction has 2423 states and 3727 transitions.
[2020-08-18 19:41:02,835 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 19:41:02,836 INFO  L276                IsEmpty]: Start isEmpty. Operand 2423 states and 3727 transitions.
[2020-08-18 19:41:02,850 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 19:41:02,851 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 19:41:02,851 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 19:41:02,852 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 19:41:02,852 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 19:41:02,852 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 19:41:02,853 INFO  L82        PathProgramCache]: Analyzing trace with hash -586459585, now seen corresponding path program 1 times
[2020-08-18 19:41:02,853 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 19:41:02,853 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191310123]
[2020-08-18 19:41:02,854 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 19:41:03,284 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:41:04,334 WARN  L193               SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 19:41:04,336 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 19:41:04,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:41:04,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 19:41:04,586 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191310123]
[2020-08-18 19:41:04,586 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 19:41:04,586 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 19:41:04,587 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506022146]
[2020-08-18 19:41:04,588 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 19:41:04,588 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 19:41:04,589 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 19:41:04,590 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 19:41:04,591 INFO  L87              Difference]: Start difference. First operand 2423 states and 3727 transitions. Second operand 4 states.
[2020-08-18 19:41:05,283 WARN  L193               SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 19:41:11,344 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 19:41:11,345 INFO  L93              Difference]: Finished difference Result 5038 states and 7854 transitions.
[2020-08-18 19:41:11,351 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 19:41:11,351 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-18 19:41:11,352 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 19:41:11,374 INFO  L225             Difference]: With dead ends: 5038
[2020-08-18 19:41:11,374 INFO  L226             Difference]: Without dead ends: 4361
[2020-08-18 19:41:11,377 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 19:41:11,384 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4361 states.
[2020-08-18 19:41:11,497 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359.
[2020-08-18 19:41:11,497 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4359 states.
[2020-08-18 19:41:11,512 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions.
[2020-08-18 19:41:11,513 INFO  L78                 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327
[2020-08-18 19:41:11,513 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 19:41:11,514 INFO  L479      AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions.
[2020-08-18 19:41:11,514 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 19:41:11,514 INFO  L276                IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions.
[2020-08-18 19:41:11,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-18 19:41:11,528 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 19:41:11,528 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 19:41:11,529 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 19:41:11,529 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 19:41:11,529 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 19:41:11,529 INFO  L82        PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times
[2020-08-18 19:41:11,530 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 19:41:11,530 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528928302]
[2020-08-18 19:41:11,531 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 19:41:11,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:41:12,704 WARN  L193               SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 19:41:12,706 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 19:41:12,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:41:12,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 19:41:12,867 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528928302]
[2020-08-18 19:41:12,867 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 19:41:12,867 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 19:41:12,868 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872138006]
[2020-08-18 19:41:12,868 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 19:41:12,869 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 19:41:12,869 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 19:41:12,869 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 19:41:12,869 INFO  L87              Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 5 states.
[2020-08-18 19:41:22,920 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 19:41:22,920 INFO  L93              Difference]: Finished difference Result 12898 states and 19904 transitions.
[2020-08-18 19:41:22,921 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 19:41:22,922 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 327
[2020-08-18 19:41:22,922 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 19:41:22,965 INFO  L225             Difference]: With dead ends: 12898
[2020-08-18 19:41:22,965 INFO  L226             Difference]: Without dead ends: 8554
[2020-08-18 19:41:22,975 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 19:41:22,985 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8554 states.
[2020-08-18 19:41:23,246 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347.
[2020-08-18 19:41:23,246 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8347 states.
[2020-08-18 19:41:23,265 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions.
[2020-08-18 19:41:23,265 INFO  L78                 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327
[2020-08-18 19:41:23,266 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 19:41:23,266 INFO  L479      AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions.
[2020-08-18 19:41:23,266 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 19:41:23,266 INFO  L276                IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions.
[2020-08-18 19:41:23,284 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 330
[2020-08-18 19:41:23,284 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 19:41:23,285 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 19:41:23,285 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 19:41:23,285 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 19:41:23,286 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 19:41:23,286 INFO  L82        PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times
[2020-08-18 19:41:23,286 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 19:41:23,287 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255365428]
[2020-08-18 19:41:23,287 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 19:41:23,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:41:24,081 WARN  L193               SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 19:41:24,083 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 19:41:24,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 19:41:24,347 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 19:41:24,348 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255365428]
[2020-08-18 19:41:24,348 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 19:41:24,349 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 19:41:24,349 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585930746]
[2020-08-18 19:41:24,350 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 19:41:24,350 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 19:41:24,351 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 19:41:24,351 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 19:41:24,351 INFO  L87              Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 4 states.