/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 21:33:46,022 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 21:33:46,026 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 21:33:46,068 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 21:33:46,069 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 21:33:46,076 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 21:33:46,078 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 21:33:46,082 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 21:33:46,084 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 21:33:46,087 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 21:33:46,090 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 21:33:46,090 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 21:33:46,093 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 21:33:46,095 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 21:33:46,096 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 21:33:46,098 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 21:33:46,100 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 21:33:46,101 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 21:33:46,109 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 21:33:46,112 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 21:33:46,113 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 21:33:46,114 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 21:33:46,115 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 21:33:46,131 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 21:33:46,131 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 21:33:46,131 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 21:33:46,132 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 21:33:46,133 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 21:33:46,137 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 21:33:46,137 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 21:33:46,138 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 21:33:46,142 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 21:33:46,143 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 21:33:46,145 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 21:33:46,145 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 21:33:46,146 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 21:33:46,146 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 21:33:46,146 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 21:33:46,147 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 21:33:46,148 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 21:33:46,150 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 21:33:46,191 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 21:33:46,192 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 21:33:46,193 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 21:33:46,193 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 21:33:46,194 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 21:33:46,194 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 21:33:46,194 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 21:33:46,194 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 21:33:46,195 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 21:33:46,195 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 21:33:46,196 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 21:33:46,196 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 21:33:46,196 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 21:33:46,197 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 21:33:46,197 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 21:33:46,197 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 21:33:46,197 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 21:33:46,197 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 21:33:46,198 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 21:33:46,198 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 21:33:46,198 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 21:33:46,198 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 21:33:46,198 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 21:33:46,199 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 21:33:46,199 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 21:33:46,199 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 21:33:46,199 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 21:33:46,199 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 21:33:46,199 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 21:33:46,200 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true;
[2020-09-24 21:33:46,620 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 21:33:46,646 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 21:33:46,650 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 21:33:46,653 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 21:33:46,653 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 21:33:46,654 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c
[2020-09-24 21:33:46,743 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/053f3158b/fae4a77896e6408eb7482fac9072e3f6/FLAG93df28152
[2020-09-24 21:33:47,256 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 21:33:47,257 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_7-2.c
[2020-09-24 21:33:47,263 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/053f3158b/fae4a77896e6408eb7482fac9072e3f6/FLAG93df28152
[2020-09-24 21:33:47,597 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/053f3158b/fae4a77896e6408eb7482fac9072e3f6
[2020-09-24 21:33:47,609 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 21:33:47,615 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 21:33:47,616 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 21:33:47,616 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 21:33:47,620 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 21:33:47,621 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,625 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f88baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47, skipping insertion in model container
[2020-09-24 21:33:47,625 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,634 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 21:33:47,657 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 21:33:47,866 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 21:33:47,871 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 21:33:47,890 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 21:33:47,905 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 21:33:47,906 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47 WrapperNode
[2020-09-24 21:33:47,906 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 21:33:47,907 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 21:33:47,907 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 21:33:47,907 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 21:33:47,920 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,921 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,927 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,927 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,931 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,934 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,935 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (1/1) ...
[2020-09-24 21:33:47,937 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 21:33:47,937 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 21:33:47,937 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 21:33:47,937 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 21:33:47,938 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (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 21:33:48,097 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 21:33:48,097 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 21:33:48,097 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo
[2020-09-24 21:33:48,098 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 21:33:48,098 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 21:33:48,098 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 21:33:48,098 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo
[2020-09-24 21:33:48,098 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 21:33:48,098 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 21:33:48,099 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 21:33:48,315 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 21:33:48,315 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 21:33:48,321 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:33:48 BoogieIcfgContainer
[2020-09-24 21:33:48,321 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 21:33:48,322 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 21:33:48,323 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 21:33:48,327 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 21:33:48,328 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:33:47" (1/3) ...
[2020-09-24 21:33:48,329 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4f37bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:33:48, skipping insertion in model container
[2020-09-24 21:33:48,329 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:47" (2/3) ...
[2020-09-24 21:33:48,329 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4f37bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:33:48, skipping insertion in model container
[2020-09-24 21:33:48,330 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:33:48" (3/3) ...
[2020-09-24 21:33:48,332 INFO  L109   eAbstractionObserver]: Analyzing ICFG fibo_7-2.c
[2020-09-24 21:33:48,345 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 21:33:48,354 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 21:33:48,382 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 21:33:48,435 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 21:33:48,435 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 21:33:48,435 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 21:33:48,435 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 21:33:48,436 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 21:33:48,436 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 21:33:48,436 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 21:33:48,436 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 21:33:48,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states.
[2020-09-24 21:33:48,470 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 21:33:48,471 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:33:48,472 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:33:48,472 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:33:48,481 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:33:48,481 INFO  L82        PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times
[2020-09-24 21:33:48,493 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:33:48,494 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787378329]
[2020-09-24 21:33:48,494 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:33:48,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:48,616 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:48,668 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:48,817 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:48,817 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 21:33:48,820 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:33:48,820 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 215
[2020-09-24 21:33:48,823 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:48,823 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 21:33:48,824 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:33:48,825 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 21:33:48,825 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 21:33:48,880 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:33:48,881 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:48,884 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:48,886 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:48,886 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:33:48,886 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:48,887 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 21:33:48,887 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:48,887 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:33:48,887 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:48,888 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:33:48,888 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:48,892 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:33:48,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:48,901 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:48,911 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:48,911 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:33:48,912 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:48,912 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-24 21:33:48,912 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:48,912 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 21:33:48,913 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:33:48,913 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:33:48,913 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:33:48,946 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 21:33:48,947 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787378329]
[2020-09-24 21:33:48,950 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:33:48,950 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 21:33:48,951 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4854562]
[2020-09-24 21:33:48,958 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 21:33:48,958 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:33:48,976 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 21:33:48,977 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 21:33:48,980 INFO  L87              Difference]: Start difference. First operand 31 states. Second operand 5 states.
[2020-09-24 21:33:49,111 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:33:49,111 INFO  L93              Difference]: Finished difference Result 44 states and 50 transitions.
[2020-09-24 21:33:49,112 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 21:33:49,114 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-09-24 21:33:49,114 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:33:49,128 INFO  L225             Difference]: With dead ends: 44
[2020-09-24 21:33:49,128 INFO  L226             Difference]: Without dead ends: 28
[2020-09-24 21:33:49,133 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 21:33:49,155 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-09-24 21:33:49,185 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-09-24 21:33:49,187 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-09-24 21:33:49,189 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2020-09-24 21:33:49,191 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16
[2020-09-24 21:33:49,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:33:49,191 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2020-09-24 21:33:49,192 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 21:33:49,192 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2020-09-24 21:33:49,194 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-09-24 21:33:49,194 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:33:49,195 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:33:49,195 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 21:33:49,195 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:33:49,196 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:33:49,196 INFO  L82        PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times
[2020-09-24 21:33:49,196 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:33:49,197 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354402084]
[2020-09-24 21:33:49,197 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:33:49,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:49,212 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,253 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,434 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:49,435 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 26
[2020-09-24 21:33:49,438 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:33:49,438 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 227
[2020-09-24 21:33:49,438 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:49,439 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 21:33:49,439 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:33:49,439 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:33:49,441 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 21:33:49,452 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:33:49,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:49,454 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,455 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:49,456 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:33:49,456 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:49,456 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 21:33:49,456 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:49,456 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:33:49,457 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:49,457 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:33:49,457 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:49,458 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:33:49,461 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:49,464 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,486 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:49,486 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:33:49,486 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:49,486 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 24
[2020-09-24 21:33:49,487 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:49,487 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 21:33:49,487 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:33:49,487 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:33:49,488 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:33:49,510 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 21:33:49,511 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354402084]
[2020-09-24 21:33:49,511 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 21:33:49,511 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 21:33:49,512 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679489058]
[2020-09-24 21:33:49,514 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 21:33:49,514 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:33:49,514 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 21:33:49,514 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 21:33:49,515 INFO  L87              Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states.
[2020-09-24 21:33:49,579 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:33:49,580 INFO  L93              Difference]: Finished difference Result 36 states and 41 transitions.
[2020-09-24 21:33:49,580 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 21:33:49,581 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 17
[2020-09-24 21:33:49,581 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:33:49,582 INFO  L225             Difference]: With dead ends: 36
[2020-09-24 21:33:49,582 INFO  L226             Difference]: Without dead ends: 30
[2020-09-24 21:33:49,584 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 21:33:49,585 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-09-24 21:33:49,591 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28.
[2020-09-24 21:33:49,591 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-09-24 21:33:49,593 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2020-09-24 21:33:49,593 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17
[2020-09-24 21:33:49,593 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:33:49,593 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2020-09-24 21:33:49,594 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 21:33:49,594 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2020-09-24 21:33:49,595 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-09-24 21:33:49,596 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:33:49,596 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 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]
[2020-09-24 21:33:49,596 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 21:33:49,597 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:33:49,597 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:33:49,597 INFO  L82        PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times
[2020-09-24 21:33:49,597 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:33:49,599 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646418088]
[2020-09-24 21:33:49,599 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:33:49,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:49,618 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,637 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,668 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:49,892 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,363 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:51,363 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 46
[2020-09-24 21:33:51,364 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 21:33:51,364 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1751
[2020-09-24 21:33:51,364 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:51,365 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:33:51,365 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:33:51,365 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 21:33:51,365 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:33:51,382 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:33:51,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:51,386 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,388 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:51,388 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:33:51,389 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:51,389 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 21:33:51,389 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:51,390 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:33:51,390 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:51,390 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:33:51,391 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:33:51,393 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:33:51,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:51,413 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,456 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,529 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,597 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:51,597 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 32
[2020-09-24 21:33:51,597 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 21:33:51,598 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 187
[2020-09-24 21:33:51,598 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:51,598 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:33:51,598 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:33:51,599 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-24 21:33:51,599 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:51,641 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:33:51,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:51,648 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,657 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:51,658 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:33:51,658 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:51,658 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-24 21:33:51,658 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:51,659 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:33:51,659 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:51,659 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:33:51,659 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:33:51,685 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 21:33:51,686 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:51,690 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,696 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:51,697 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:33:51,697 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:51,697 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:33:51,698 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:51,698 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:33:51,698 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:51,698 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:33:51,699 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:51,709 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-09-24 21:33:51,710 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646418088]
[2020-09-24 21:33:51,715 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:33:51,716 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 21:33:51,716 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037490036]
[2020-09-24 21:33:51,717 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 21:33:51,717 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:33:51,718 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 21:33:51,719 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-24 21:33:51,719 INFO  L87              Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states.
[2020-09-24 21:33:51,897 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:33:51,898 INFO  L93              Difference]: Finished difference Result 44 states and 54 transitions.
[2020-09-24 21:33:51,898 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 21:33:51,898 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 33
[2020-09-24 21:33:51,899 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:33:51,900 INFO  L225             Difference]: With dead ends: 44
[2020-09-24 21:33:51,901 INFO  L226             Difference]: Without dead ends: 38
[2020-09-24 21:33:51,901 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90
[2020-09-24 21:33:51,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-09-24 21:33:51,910 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36.
[2020-09-24 21:33:51,910 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2020-09-24 21:33:51,912 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions.
[2020-09-24 21:33:51,912 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 33
[2020-09-24 21:33:51,913 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:33:51,913 INFO  L479      AbstractCegarLoop]: Abstraction has 36 states and 44 transitions.
[2020-09-24 21:33:51,913 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 21:33:51,913 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions.
[2020-09-24 21:33:51,915 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2020-09-24 21:33:51,915 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:33:51,915 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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 21:33:51,915 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 21:33:51,916 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:33:51,916 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:33:51,916 INFO  L82        PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times
[2020-09-24 21:33:51,916 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:33:51,917 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738987674]
[2020-09-24 21:33:51,917 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:33:51,923 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:51,930 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,944 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:51,987 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:52,164 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:52,181 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:53,589 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:53,589 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-24 21:33:53,589 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 21:33:53,590 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1664
[2020-09-24 21:33:53,590 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:53,590 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:33:53,590 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:33:53,591 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-09-24 21:33:53,591 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:53,603 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:33:53,604 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:53,606 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:53,606 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:53,607 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:33:53,607 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:53,607 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 21:33:53,607 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:53,608 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:33:53,608 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:53,608 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:33:53,608 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:53,610 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:33:53,614 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:53,620 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:53,633 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:53,666 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:53,686 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,085 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:54,086 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 34
[2020-09-24 21:33:54,086 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 21:33:54,086 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 470
[2020-09-24 21:33:54,087 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:54,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:33:54,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:33:54,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-09-24 21:33:54,088 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:54,115 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:33:54,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:54,119 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,138 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:54,138 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:33:54,139 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:54,139 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 20
[2020-09-24 21:33:54,139 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:54,140 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:33:54,140 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:54,140 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 21:33:54,140 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:33:54,169 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 21:33:54,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:54,174 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,182 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:54,183 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:33:54,183 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:54,183 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-24 21:33:54,184 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:54,184 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:33:54,184 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:54,184 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:33:54,184 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:54,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-09-24 21:33:54,195 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738987674]
[2020-09-24 21:33:54,196 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:33:54,196 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 21:33:54,196 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114528516]
[2020-09-24 21:33:54,198 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 21:33:54,198 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:33:54,199 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 21:33:54,200 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-09-24 21:33:54,200 INFO  L87              Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 7 states.
[2020-09-24 21:33:54,335 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:33:54,335 INFO  L93              Difference]: Finished difference Result 76 states and 100 transitions.
[2020-09-24 21:33:54,335 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 21:33:54,336 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 35
[2020-09-24 21:33:54,336 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:33:54,339 INFO  L225             Difference]: With dead ends: 76
[2020-09-24 21:33:54,339 INFO  L226             Difference]: Without dead ends: 70
[2020-09-24 21:33:54,340 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2020-09-24 21:33:54,340 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70 states.
[2020-09-24 21:33:54,352 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56.
[2020-09-24 21:33:54,352 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-09-24 21:33:54,354 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions.
[2020-09-24 21:33:54,355 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 35
[2020-09-24 21:33:54,355 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:33:54,355 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 75 transitions.
[2020-09-24 21:33:54,355 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 21:33:54,355 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions.
[2020-09-24 21:33:54,358 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-09-24 21:33:54,358 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:33:54,359 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 3, 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]
[2020-09-24 21:33:54,359 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 21:33:54,359 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:33:54,359 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:33:54,359 INFO  L82        PathProgramCache]: Analyzing trace with hash 1693530075, now seen corresponding path program 1 times
[2020-09-24 21:33:54,360 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:33:54,360 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228018613]
[2020-09-24 21:33:54,360 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:33:54,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:54,375 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,394 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,429 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,479 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,555 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,693 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:54,737 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:57,755 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:59,371 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:59,372 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 68
[2020-09-24 21:33:59,372 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 21:33:59,372 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5002
[2020-09-24 21:33:59,373 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:59,373 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 21:33:59,373 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:33:59,373 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 21:33:59,373 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:59,386 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:33:59,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:59,387 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:59,390 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:33:59,390 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:33:59,391 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:33:59,391 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 21:33:59,391 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:33:59,391 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:33:59,391 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:33:59,392 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:33:59,392 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:33:59,393 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:33:59,400 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:33:59,409 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:59,422 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:59,474 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:33:59,531 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:00,078 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:00,109 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:00,291 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,026 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:03,026 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-24 21:34:03,027 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 7
[2020-09-24 21:34:03,027 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3622
[2020-09-24 21:34:03,027 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:03,027 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 21:34:03,028 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:34:03,028 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 50
[2020-09-24 21:34:03,028 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:03,050 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:03,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:03,062 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,091 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,131 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:03,131 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 32
[2020-09-24 21:34:03,131 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:34:03,132 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 71
[2020-09-24 21:34:03,132 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:03,132 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 21:34:03,132 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:03,132 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 29
[2020-09-24 21:34:03,133 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:03,155 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:03,156 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:03,158 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,164 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:03,164 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:03,164 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:03,165 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:34:03,165 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:03,165 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:34:03,165 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:03,166 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:34:03,166 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:03,178 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 21:34:03,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:03,181 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,186 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:03,187 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:03,187 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:03,187 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:34:03,188 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:03,188 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:03,188 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:03,188 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:34:03,188 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:03,191 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-09-24 21:34:03,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:03,194 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,200 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:03,200 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:34:03,200 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:03,201 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:34:03,201 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:03,201 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:03,202 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:03,202 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:34:03,203 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:03,211 INFO  L134       CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2020-09-24 21:34:03,211 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228018613]
[2020-09-24 21:34:03,211 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:34:03,212 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 21:34:03,212 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662334098]
[2020-09-24 21:34:03,213 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 21:34:03,213 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:34:03,213 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 21:34:03,213 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-09-24 21:34:03,214 INFO  L87              Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 8 states.
[2020-09-24 21:34:03,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:34:03,341 INFO  L93              Difference]: Finished difference Result 102 states and 144 transitions.
[2020-09-24 21:34:03,344 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 21:34:03,344 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 51
[2020-09-24 21:34:03,345 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:34:03,346 INFO  L225             Difference]: With dead ends: 102
[2020-09-24 21:34:03,346 INFO  L226             Difference]: Without dead ends: 52
[2020-09-24 21:34:03,351 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2020-09-24 21:34:03,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-09-24 21:34:03,360 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46.
[2020-09-24 21:34:03,365 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-09-24 21:34:03,368 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions.
[2020-09-24 21:34:03,370 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 51
[2020-09-24 21:34:03,370 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:34:03,371 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 54 transitions.
[2020-09-24 21:34:03,371 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 21:34:03,371 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions.
[2020-09-24 21:34:03,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-24 21:34:03,375 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:34:03,375 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 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]
[2020-09-24 21:34:03,376 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 21:34:03,376 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:34:03,376 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:34:03,376 INFO  L82        PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 2 times
[2020-09-24 21:34:03,379 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:34:03,379 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118224156]
[2020-09-24 21:34:03,379 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:34:03,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:03,393 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,418 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:03,460 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:04,040 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:08,391 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:08,391 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 69
[2020-09-24 21:34:08,392 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 21:34:08,392 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5002
[2020-09-24 21:34:08,392 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:08,393 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 21:34:08,393 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:34:08,393 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 19
[2020-09-24 21:34:08,394 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:08,415 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:34:08,416 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:08,417 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:08,418 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:08,418 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:34:08,419 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:08,419 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 21:34:08,419 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:08,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:34:08,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:08,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:34:08,421 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:08,422 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:34:08,430 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:08,439 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:08,464 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:08,514 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:09,746 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:09,747 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 55
[2020-09-24 21:34:09,747 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 21:34:09,747 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1314
[2020-09-24 21:34:09,748 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:09,748 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 21:34:09,748 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:34:09,749 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 51
[2020-09-24 21:34:09,749 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:09,789 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:09,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:09,801 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:09,818 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,063 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:10,064 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 21:34:10,064 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:34:10,064 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 266
[2020-09-24 21:34:10,064 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:10,064 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 21:34:10,064 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:10,065 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-09-24 21:34:10,065 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:10,110 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:10,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:10,115 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,134 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:10,134 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:34:10,134 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:10,135 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-09-24 21:34:10,135 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:10,135 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:34:10,135 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:10,135 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 21:34:10,136 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:10,157 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 21:34:10,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:10,160 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,166 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:10,167 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:10,167 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:10,167 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 21:34:10,167 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:10,168 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:10,168 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:10,168 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:34:10,168 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:10,171 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 21:34:10,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:10,174 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,182 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:10,182 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:34:10,182 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:10,182 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 21:34:10,183 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:10,183 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:10,183 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:10,183 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:34:10,183 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:10,191 INFO  L134       CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2020-09-24 21:34:10,192 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118224156]
[2020-09-24 21:34:10,192 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:34:10,192 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 21:34:10,193 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051465672]
[2020-09-24 21:34:10,193 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 21:34:10,193 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:34:10,194 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 21:34:10,194 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-09-24 21:34:10,194 INFO  L87              Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states.
[2020-09-24 21:34:10,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:34:10,341 INFO  L93              Difference]: Finished difference Result 72 states and 91 transitions.
[2020-09-24 21:34:10,342 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 21:34:10,342 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 52
[2020-09-24 21:34:10,342 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:34:10,346 INFO  L225             Difference]: With dead ends: 72
[2020-09-24 21:34:10,347 INFO  L226             Difference]: Without dead ends: 66
[2020-09-24 21:34:10,348 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132
[2020-09-24 21:34:10,348 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2020-09-24 21:34:10,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58.
[2020-09-24 21:34:10,368 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-09-24 21:34:10,370 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions.
[2020-09-24 21:34:10,370 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 52
[2020-09-24 21:34:10,370 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:34:10,370 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 75 transitions.
[2020-09-24 21:34:10,371 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 21:34:10,371 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions.
[2020-09-24 21:34:10,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 120
[2020-09-24 21:34:10,375 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:34:10,376 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:34:10,376 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 21:34:10,376 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:34:10,376 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:34:10,376 INFO  L82        PathProgramCache]: Analyzing trace with hash -1607002557, now seen corresponding path program 3 times
[2020-09-24 21:34:10,377 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:34:10,377 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011126318]
[2020-09-24 21:34:10,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:34:10,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:10,400 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,420 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,449 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,484 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,506 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,668 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:10,687 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:11,588 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,358 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,468 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,511 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,674 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,768 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,789 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,813 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:12,879 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:13,401 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:13,511 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:13,983 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:14,075 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:14,169 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,412 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:15,412 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 152
[2020-09-24 21:34:15,413 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 21
[2020-09-24 21:34:15,413 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5021
[2020-09-24 21:34:15,413 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:15,413 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-24 21:34:15,413 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:34:15,414 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 33
[2020-09-24 21:34:15,414 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:15,437 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:34:15,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:15,438 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,439 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:15,440 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:34:15,440 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:15,440 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 21:34:15,440 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:15,440 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:34:15,441 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:15,441 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:34:15,441 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:15,442 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:34:15,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:15,463 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,481 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,519 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,542 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,587 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,815 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,858 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,892 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:15,926 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:16,026 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:16,697 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:16,784 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:17,011 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,135 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,187 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,222 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,263 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,469 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:20,469 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 138
[2020-09-24 21:34:20,470 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 17
[2020-09-24 21:34:20,470 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5013
[2020-09-24 21:34:20,471 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:20,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 16
[2020-09-24 21:34:20,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 4
[2020-09-24 21:34:20,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 65
[2020-09-24 21:34:20,472 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:20,556 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:20,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:20,572 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,596 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,638 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,775 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:20,989 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:21,016 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:21,090 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:21,125 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:22,805 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:22,806 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 53
[2020-09-24 21:34:22,806 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 9
[2020-09-24 21:34:22,807 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2239
[2020-09-24 21:34:22,807 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:22,807 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 11
[2020-09-24 21:34:22,807 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:22,808 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 50
[2020-09-24 21:34:22,808 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:22,932 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:22,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:22,943 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:22,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,028 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,113 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:23,114 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 32
[2020-09-24 21:34:23,114 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 21:34:23,114 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 176
[2020-09-24 21:34:23,115 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:23,115 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 21:34:23,115 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:23,116 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 29
[2020-09-24 21:34:23,116 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:23,268 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:23,271 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:23,274 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,284 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:23,284 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:23,285 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:23,285 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-24 21:34:23,286 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:23,286 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:23,286 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:23,287 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:34:23,287 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:23,290 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 21:34:23,293 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:23,296 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,306 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:23,306 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:23,307 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:23,307 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-24 21:34:23,307 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:23,308 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:34:23,308 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:23,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:34:23,309 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:23,357 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-09-24 21:34:23,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:23,361 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,368 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:23,369 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:23,369 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:23,369 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 21:34:23,370 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:23,370 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:23,370 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:23,371 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:34:23,371 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 21:34:23,379 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44
[2020-09-24 21:34:23,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:23,395 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,418 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,468 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,485 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,502 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:23,859 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:24,004 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:24,030 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:24,577 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:25,926 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:25,947 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:25,959 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:26,469 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:28,389 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:28,389 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 75
[2020-09-24 21:34:28,389 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 13
[2020-09-24 21:34:28,389 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4999
[2020-09-24 21:34:28,390 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:28,390 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 21:34:28,390 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 21:34:28,390 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 71
[2020-09-24 21:34:28,390 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:28,429 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:28,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:28,440 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:28,462 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:28,476 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:28,558 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:28,736 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:28,758 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,092 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:30,092 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 53
[2020-09-24 21:34:30,093 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 6
[2020-09-24 21:34:30,093 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1655
[2020-09-24 21:34:30,093 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:30,093 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 21:34:30,093 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:30,094 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 50
[2020-09-24 21:34:30,094 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:30,116 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:30,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:30,124 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,146 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,182 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:30,182 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 32
[2020-09-24 21:34:30,183 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 21:34:30,183 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 60
[2020-09-24 21:34:30,183 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:30,183 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:30,184 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:30,184 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-24 21:34:30,184 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:30,188 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 21:34:30,189 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:30,190 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,193 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:30,193 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:30,193 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:30,194 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 21:34:30,194 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:30,194 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:34:30,194 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:30,194 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:34:30,195 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:30,196 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 21:34:30,197 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:30,198 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,201 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:30,201 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:30,201 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:30,201 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 21:34:30,202 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:30,202 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:34:30,202 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:30,202 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:34:30,203 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:30,205 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-09-24 21:34:30,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:30,208 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,213 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:30,214 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 21:34:30,214 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:30,214 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 21:34:30,214 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:30,214 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:30,215 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:30,215 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 21:34:30,215 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:30,218 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44
[2020-09-24 21:34:30,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:30,222 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:30,229 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:30,229 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 21:34:30,229 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:30,230 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 21:34:30,230 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:30,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 21:34:30,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:30,231 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 21:34:30,231 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:30,269 INFO  L134       CoverageAnalysis]: Checked inductivity of 453 backedges. 109 proven. 181 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked.
[2020-09-24 21:34:30,270 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011126318]
[2020-09-24 21:34:30,270 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 21:34:30,270 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17
[2020-09-24 21:34:30,271 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787530797]
[2020-09-24 21:34:30,271 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-09-24 21:34:30,272 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 21:34:30,272 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-09-24 21:34:30,272 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272
[2020-09-24 21:34:30,272 INFO  L87              Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 17 states.
[2020-09-24 21:34:30,922 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 21:34:30,922 INFO  L93              Difference]: Finished difference Result 132 states and 210 transitions.
[2020-09-24 21:34:30,923 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-09-24 21:34:30,924 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 119
[2020-09-24 21:34:30,924 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 21:34:30,928 INFO  L225             Difference]: With dead ends: 132
[2020-09-24 21:34:30,928 INFO  L226             Difference]: Without dead ends: 80
[2020-09-24 21:34:30,930 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756
[2020-09-24 21:34:30,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80 states.
[2020-09-24 21:34:30,941 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70.
[2020-09-24 21:34:30,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-09-24 21:34:30,942 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions.
[2020-09-24 21:34:30,942 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 119
[2020-09-24 21:34:30,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 21:34:30,943 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 87 transitions.
[2020-09-24 21:34:30,943 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-09-24 21:34:30,943 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions.
[2020-09-24 21:34:30,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 194
[2020-09-24 21:34:30,946 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 21:34:30,946 INFO  L422         BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 21:34:30,947 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 21:34:30,947 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 21:34:30,947 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 21:34:30,947 INFO  L82        PathProgramCache]: Analyzing trace with hash 532445701, now seen corresponding path program 4 times
[2020-09-24 21:34:30,948 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 21:34:30,948 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367036785]
[2020-09-24 21:34:30,948 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 21:34:30,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:30,983 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,028 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,064 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,167 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,208 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,284 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,481 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,520 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:31,561 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:32,015 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:32,054 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:32,219 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:32,271 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:33,671 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:34,072 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:34,212 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:34,468 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:35,985 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:35,985 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 242
[2020-09-24 21:34:35,985 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 17
[2020-09-24 21:34:35,985 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5015
[2020-09-24 21:34:35,986 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:35,986 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 12
[2020-09-24 21:34:35,986 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 21:34:35,986 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 31
[2020-09-24 21:34:35,986 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:36,010 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 21:34:36,011 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:36,012 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,012 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 21:34:36,013 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 21:34:36,013 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 21:34:36,013 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 21:34:36,013 FATAL L256   erpolLogProxyWrapper]: Heuristic: LOWLEXORDER
[2020-09-24 21:34:36,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 21:34:36,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 21:34:36,014 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 21:34:36,014 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 21:34:36,014 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 21:34:36,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 21:34:36,055 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,125 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,206 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,256 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,363 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,405 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:36,522 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:37,324 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:37,522 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 21:34:37,829 FATAL L256   erpolLogProxyWrapper]: Now shrinking...