/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label19.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 20:33:49,673 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 20:33:49,677 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 20:33:49,725 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 20:33:49,726 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 20:33:49,736 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 20:33:49,739 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-24 20:33:49,746 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
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[2020-09-24 20:33:49,753 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 20:33:49,756 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 20:33:49,759 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 20:33:49,761 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 20:33:49,762 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 20:33:49,763 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 20:33:49,765 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 20:33:49,775 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 20:33:49,777 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 20:33:49,778 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 20:33:49,779 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 20:33:49,780 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 20:33:49,783 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 20:33:49,783 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 20:33:49,784 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 20:33:49,787 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 20:33:49,787 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 20:33:49,788 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 20:33:49,789 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 20:33:49,789 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 20:33:49,790 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 20:33:49,791 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 20:33:49,792 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 20:33:49,793 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-09-24 20:33:49,794 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 20:33:49,797 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 20:33:49,798 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
[2020-09-24 20:33:49,844 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 20:33:49,845 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 20:33:49,847 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 20:33:49,848 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 20:33:49,848 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 20:33:49,848 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 20:33:49,849 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 20:33:49,849 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 20:33:49,849 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 20:33:49,849 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 20:33:49,850 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 20:33:49,851 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 20:33:49,851 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 20:33:49,851 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 20:33:49,852 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 20:33:49,852 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 20:33:49,852 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 20:33:49,852 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 20:33:49,852 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 20:33:49,853 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 20:33:49,853 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 20:33:49,853 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 20:33:49,853 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 20:33:49,853 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 20:33:49,854 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 20:33:49,854 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 20:33:49,854 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 20:33:49,854 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 20:33:49,854 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 20:33:49,855 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.rcfgbuilder: Size of a code block -> SingleStatement
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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
[2020-09-24 20:33:50,308 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 20:33:50,326 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 20:33:50,331 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 20:33:50,332 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 20:33:50,333 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 20:33:50,334 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label19.c
[2020-09-24 20:33:50,410 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2487f2a11/83049213eb89471b85c2e5836eac8758/FLAG4d1166f48
[2020-09-24 20:33:50,994 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 20:33:50,995 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label19.c
[2020-09-24 20:33:51,020 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2487f2a11/83049213eb89471b85c2e5836eac8758/FLAG4d1166f48
[2020-09-24 20:33:51,244 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2487f2a11/83049213eb89471b85c2e5836eac8758
[2020-09-24 20:33:51,259 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 20:33:51,266 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 20:33:51,268 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 20:33:51,268 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 20:33:51,272 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 20:33:51,273 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:33:51" (1/1) ...
[2020-09-24 20:33:51,278 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e01188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:51, skipping insertion in model container
[2020-09-24 20:33:51,278 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:33:51" (1/1) ...
[2020-09-24 20:33:51,287 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 20:33:51,340 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 20:33:51,777 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:33:51,787 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 20:33:52,078 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:33:52,129 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 20:33:52,131 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52 WrapperNode
[2020-09-24 20:33:52,131 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 20:33:52,133 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 20:33:52,133 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 20:33:52,133 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 20:33:52,155 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,158 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,194 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,194 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,254 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,273 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,278 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (1/1) ...
[2020-09-24 20:33:52,286 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 20:33:52,287 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 20:33:52,287 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 20:33:52,287 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 20:33:52,288 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (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
[2020-09-24 20:33:52,394 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 20:33:52,394 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 20:33:52,395 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 20:33:52,395 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 20:33:52,395 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 20:33:52,395 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 20:33:52,395 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 20:33:52,396 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 20:33:52,396 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 20:33:52,396 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 20:33:52,396 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 20:33:53,786 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 20:33:53,787 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 20:33:53,797 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:33:53 BoogieIcfgContainer
[2020-09-24 20:33:53,797 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 20:33:53,799 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 20:33:53,799 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 20:33:53,804 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 20:33:53,804 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:33:51" (1/3) ...
[2020-09-24 20:33:53,805 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa3c231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:33:53, skipping insertion in model container
[2020-09-24 20:33:53,806 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:33:52" (2/3) ...
[2020-09-24 20:33:53,806 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa3c231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:33:53, skipping insertion in model container
[2020-09-24 20:33:53,806 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:33:53" (3/3) ...
[2020-09-24 20:33:53,809 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem02_label19.c
[2020-09-24 20:33:53,824 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 20:33:53,836 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 20:33:53,863 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 20:33:53,904 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 20:33:53,904 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 20:33:53,904 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 20:33:53,904 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 20:33:53,905 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 20:33:53,905 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 20:33:53,905 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 20:33:53,905 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 20:33:53,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 527 states.
[2020-09-24 20:33:53,962 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 119
[2020-09-24 20:33:53,962 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:33:53,964 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]
[2020-09-24 20:33:53,965 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:33:53,974 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:33:53,974 INFO  L82        PathProgramCache]: Analyzing trace with hash 405983745, now seen corresponding path program 1 times
[2020-09-24 20:33:53,987 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:33:53,987 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226177907]
[2020-09-24 20:33:53,988 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:33:54,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:33:54,383 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:54,651 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:54,939 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:57,368 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:57,710 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:58,132 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:58,759 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:33:59,240 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:33:59,241 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 127
[2020-09-24 20:33:59,241 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 7
[2020-09-24 20:33:59,242 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5000
[2020-09-24 20:33:59,245 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:33:59,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 22
[2020-09-24 20:33:59,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 20:33:59,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 99
[2020-09-24 20:33:59,246 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 20:33:59,794 WARN  L193               SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32
[2020-09-24 20:33:59,953 WARN  L193               SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32
[2020-09-24 20:34:00,115 WARN  L193               SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33
[2020-09-24 20:34:00,352 WARN  L193               SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31
[2020-09-24 20:34:00,919 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:34:00,956 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:34:00,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:01,025 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:34:01,026 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 20:34:01,026 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:34:01,026 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 68
[2020-09-24 20:34:01,027 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:34:01,027 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 20:34:01,027 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:34:01,027 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 20:34:01,028 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:34:01,206 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:34:01,207 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226177907]
[2020-09-24 20:34:01,209 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:34:01,210 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2020-09-24 20:34:01,211 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098005723]
[2020-09-24 20:34:01,218 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 20:34:01,218 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:34:01,236 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 20:34:01,237 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380
[2020-09-24 20:34:01,240 INFO  L87              Difference]: Start difference. First operand 527 states. Second operand 20 states.
[2020-09-24 20:34:01,896 WARN  L193               SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82
[2020-09-24 20:34:02,164 WARN  L193               SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82
[2020-09-24 20:34:02,414 WARN  L193               SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87
[2020-09-24 20:34:02,726 WARN  L193               SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83
[2020-09-24 20:34:03,156 WARN  L193               SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82
[2020-09-24 20:34:03,610 WARN  L193               SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75
[2020-09-24 20:34:03,859 WARN  L193               SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82
[2020-09-24 20:34:04,134 WARN  L193               SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 20:34:04,300 WARN  L193               SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37
[2020-09-24 20:34:04,535 WARN  L193               SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 20:34:05,866 WARN  L193               SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 20:34:06,081 WARN  L193               SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 20:34:06,647 WARN  L193               SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80
[2020-09-24 20:34:07,169 WARN  L193               SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75
[2020-09-24 20:34:07,652 WARN  L193               SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80
[2020-09-24 20:34:07,966 WARN  L193               SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 20:34:08,411 WARN  L193               SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76
[2020-09-24 20:34:08,660 WARN  L193               SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 20:34:09,135 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75
[2020-09-24 20:34:09,412 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75
[2020-09-24 20:34:10,886 WARN  L193               SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62
[2020-09-24 20:34:12,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:34:12,452 INFO  L93              Difference]: Finished difference Result 1675 states and 2355 transitions.
[2020-09-24 20:34:12,453 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2020-09-24 20:34:12,454 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 118
[2020-09-24 20:34:12,455 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:34:12,483 INFO  L225             Difference]: With dead ends: 1675
[2020-09-24 20:34:12,483 INFO  L226             Difference]: Without dead ends: 1038
[2020-09-24 20:34:12,500 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=943, Invalid=2479, Unknown=0, NotChecked=0, Total=3422
[2020-09-24 20:34:12,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1038 states.
[2020-09-24 20:34:12,610 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 960.
[2020-09-24 20:34:12,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 960 states.
[2020-09-24 20:34:12,619 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1137 transitions.
[2020-09-24 20:34:12,621 INFO  L78                 Accepts]: Start accepts. Automaton has 960 states and 1137 transitions. Word has length 118
[2020-09-24 20:34:12,622 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:34:12,622 INFO  L479      AbstractCegarLoop]: Abstraction has 960 states and 1137 transitions.
[2020-09-24 20:34:12,622 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 20:34:12,623 INFO  L276                IsEmpty]: Start isEmpty. Operand 960 states and 1137 transitions.
[2020-09-24 20:34:12,631 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 136
[2020-09-24 20:34:12,631 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:34:12,632 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:34:12,632 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 20:34:12,632 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:34:12,632 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:34:12,633 INFO  L82        PathProgramCache]: Analyzing trace with hash 129162490, now seen corresponding path program 1 times
[2020-09-24 20:34:12,633 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:34:12,633 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401827223]
[2020-09-24 20:34:12,634 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:34:12,687 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:34:12,724 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:12,823 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:13,257 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:14,092 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:14,143 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:14,315 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:15,369 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:16,529 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:17,689 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:34:17,690 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 146
[2020-09-24 20:34:17,690 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 20:34:17,690 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5001
[2020-09-24 20:34:17,691 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:34:17,691 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 28
[2020-09-24 20:34:17,691 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 20:34:17,691 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 109
[2020-09-24 20:34:17,691 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:34:18,561 WARN  L193               SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43
[2020-09-24 20:34:18,972 WARN  L193               SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50
[2020-09-24 20:34:19,363 WARN  L193               SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50
[2020-09-24 20:34:19,748 WARN  L193               SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48
[2020-09-24 20:34:20,050 WARN  L193               SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48
[2020-09-24 20:34:20,443 WARN  L193               SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48
[2020-09-24 20:34:20,748 WARN  L193               SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47
[2020-09-24 20:34:21,037 WARN  L193               SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43
[2020-09-24 20:34:21,390 WARN  L193               SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44
[2020-09-24 20:34:21,735 WARN  L193               SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40
[2020-09-24 20:34:22,116 WARN  L193               SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48
[2020-09-24 20:34:22,345 WARN  L193               SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30
[2020-09-24 20:34:22,587 WARN  L193               SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31
[2020-09-24 20:34:22,744 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26
[2020-09-24 20:34:22,803 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:34:22,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:34:22,817 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:22,852 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:34:22,853 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 20:34:22,853 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:34:22,853 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 40
[2020-09-24 20:34:22,853 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:34:22,853 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 20:34:22,854 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:34:22,854 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 20:34:22,854 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:34:22,942 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 20:34:22,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:34:22,950 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:22,982 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:34:22,982 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 20:34:22,982 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:34:22,983 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 35
[2020-09-24 20:34:22,983 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:34:22,983 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 20:34:22,983 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 20:34:22,983 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 20:34:22,983 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:34:23,234 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:34:23,235 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401827223]
[2020-09-24 20:34:23,235 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:34:23,235 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27
[2020-09-24 20:34:23,235 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337220153]
[2020-09-24 20:34:23,237 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 27 states
[2020-09-24 20:34:23,237 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:34:23,238 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2020-09-24 20:34:23,238 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702
[2020-09-24 20:34:23,239 INFO  L87              Difference]: Start difference. First operand 960 states and 1137 transitions. Second operand 27 states.
[2020-09-24 20:34:23,970 WARN  L193               SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 99
[2020-09-24 20:34:24,332 WARN  L193               SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104
[2020-09-24 20:34:25,211 WARN  L193               SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107
[2020-09-24 20:34:25,708 WARN  L193               SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107
[2020-09-24 20:34:26,096 WARN  L193               SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87
[2020-09-24 20:34:26,445 WARN  L193               SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90
[2020-09-24 20:34:26,722 WARN  L193               SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88
[2020-09-24 20:34:27,057 WARN  L193               SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93
[2020-09-24 20:34:27,339 WARN  L193               SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66
[2020-09-24 20:34:27,826 WARN  L193               SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90
[2020-09-24 20:34:28,073 WARN  L193               SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49
[2020-09-24 20:34:28,458 WARN  L193               SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93
[2020-09-24 20:34:28,716 WARN  L193               SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52
[2020-09-24 20:34:29,405 WARN  L193               SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 108
[2020-09-24 20:34:29,649 WARN  L193               SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62
[2020-09-24 20:34:30,096 WARN  L193               SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 106
[2020-09-24 20:34:30,632 WARN  L193               SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 106
[2020-09-24 20:34:31,098 WARN  L193               SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91
[2020-09-24 20:34:31,511 WARN  L193               SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 108
[2020-09-24 20:34:31,975 WARN  L193               SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103
[2020-09-24 20:34:32,324 WARN  L193               SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91
[2020-09-24 20:34:32,678 WARN  L193               SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89
[2020-09-24 20:34:33,131 WARN  L193               SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103
[2020-09-24 20:34:33,441 WARN  L193               SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89
[2020-09-24 20:34:33,767 WARN  L193               SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91
[2020-09-24 20:34:34,152 WARN  L193               SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91
[2020-09-24 20:34:34,703 WARN  L193               SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 99
[2020-09-24 20:34:34,975 WARN  L193               SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62
[2020-09-24 20:34:35,385 WARN  L193               SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108
[2020-09-24 20:34:35,662 WARN  L193               SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58
[2020-09-24 20:34:36,068 WARN  L193               SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86
[2020-09-24 20:34:36,292 WARN  L193               SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45
[2020-09-24 20:34:36,644 WARN  L193               SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87
[2020-09-24 20:34:36,934 WARN  L193               SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 92
[2020-09-24 20:34:37,125 WARN  L193               SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46
[2020-09-24 20:34:37,412 WARN  L193               SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67
[2020-09-24 20:34:37,771 WARN  L193               SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92
[2020-09-24 20:34:38,215 WARN  L193               SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90
[2020-09-24 20:34:38,457 WARN  L193               SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49
[2020-09-24 20:34:38,849 WARN  L193               SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90
[2020-09-24 20:34:39,106 WARN  L193               SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49
[2020-09-24 20:34:39,400 WARN  L193               SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88
[2020-09-24 20:34:39,965 WARN  L193               SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73
[2020-09-24 20:34:40,306 WARN  L193               SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74
[2020-09-24 20:34:41,808 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:34:41,809 INFO  L93              Difference]: Finished difference Result 2462 states and 3010 transitions.
[2020-09-24 20:34:41,810 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. 
[2020-09-24 20:34:41,810 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states. Word has length 135
[2020-09-24 20:34:41,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:34:41,820 INFO  L225             Difference]: With dead ends: 2462
[2020-09-24 20:34:41,820 INFO  L226             Difference]: Without dead ends: 1524
[2020-09-24 20:34:41,827 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1933, Invalid=5207, Unknown=0, NotChecked=0, Total=7140
[2020-09-24 20:34:41,829 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1524 states.
[2020-09-24 20:34:41,880 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1364.
[2020-09-24 20:34:41,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1364 states.
[2020-09-24 20:34:41,887 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1638 transitions.
[2020-09-24 20:34:41,887 INFO  L78                 Accepts]: Start accepts. Automaton has 1364 states and 1638 transitions. Word has length 135
[2020-09-24 20:34:41,888 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:34:41,888 INFO  L479      AbstractCegarLoop]: Abstraction has 1364 states and 1638 transitions.
[2020-09-24 20:34:41,888 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 27 states.
[2020-09-24 20:34:41,888 INFO  L276                IsEmpty]: Start isEmpty. Operand 1364 states and 1638 transitions.
[2020-09-24 20:34:41,892 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2020-09-24 20:34:41,893 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 20:34:41,893 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:34:41,893 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 20:34:41,894 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:34:41,894 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:34:41,894 INFO  L82        PathProgramCache]: Analyzing trace with hash -499508160, now seen corresponding path program 1 times
[2020-09-24 20:34:41,894 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:34:41,895 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511813642]
[2020-09-24 20:34:41,895 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:34:41,928 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:34:41,961 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:42,027 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:42,318 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:42,368 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:42,429 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:44,549 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:44,731 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:44,916 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:34:45,720 FATAL L256   erpolLogProxyWrapper]: Now shrinking...