/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:01:27,539 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:01:27,543 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:01:27,570 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:01:27,570 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:01:27,571 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:01:27,573 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:01:27,575 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:01:27,577 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:01:27,578 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 17:01:27,581 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:01:27,581 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:01:27,583 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:01:27,584 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:01:27,585 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:01:27,587 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:01:27,588 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:01:27,590 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:01:27,592 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:01:27,593 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:01:27,595 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:01:27,596 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:01:27,598 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:01:27,600 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:01:27,601 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:01:27,601 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:01:27,602 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:01:27,603 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:01:27,604 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:01:27,604 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:01:27,605 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:01:27,606 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:01:27,607 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:01:27,608 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:01:27,609 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:01:27,610 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 17:01:27,610 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 17:01:27,612 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:01:27,613 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 17:01:27,640 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:01:27,640 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:01:27,642 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:01:27,642 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:01:27,642 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:01:27,643 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:01:27,643 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:01:27,643 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:01:27,643 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:01:27,643 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:01:27,644 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:01:27,644 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:01:27,644 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:01:27,644 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:01:27,644 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:01:27,644 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:01:27,645 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:01:27,645 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:01:27,645 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:01:27,645 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:01:27,646 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:01:27,646 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:01:27,646 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:01:27,646 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:01:27,646 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:01:27,647 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:01:27,647 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:01:27,647 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:01:27,647 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:01:27,647 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;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;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;log-additional-information=true;
[2020-09-24 17:01:28,201 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:01:28,230 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:01:28,235 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:01:28,236 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:01:28,238 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:01:28,240 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c
[2020-09-24 17:01:28,340 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a369a4c50/c85ef24f6a1040cab22ac8cf5682ad36/FLAGea491db95
[2020-09-24 17:01:28,897 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:01:28,898 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann04.c
[2020-09-24 17:01:28,908 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a369a4c50/c85ef24f6a1040cab22ac8cf5682ad36/FLAGea491db95
[2020-09-24 17:01:29,257 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a369a4c50/c85ef24f6a1040cab22ac8cf5682ad36
[2020-09-24 17:01:29,272 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:01:29,280 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:01:29,283 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:01:29,283 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:01:29,288 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:01:29,289 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,294 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9103a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29, skipping insertion in model container
[2020-09-24 17:01:29,294 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,304 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:01:29,332 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:01:29,548 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:01:29,553 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:01:29,571 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:01:29,587 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:01:29,588 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29 WrapperNode
[2020-09-24 17:01:29,588 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:01:29,589 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:01:29,589 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:01:29,589 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:01:29,604 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,604 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,610 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,610 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,615 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,618 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,619 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (1/1) ...
[2020-09-24 17:01:29,621 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:01:29,621 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:01:29,622 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:01:29,622 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:01:29,623 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (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 17:01:29,781 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:01:29,781 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:01:29,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure ackermann
[2020-09-24 17:01:29,782 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:01:29,782 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:01:29,782 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:01:29,782 INFO  L130     BoogieDeclarations]: Found specification of procedure ackermann
[2020-09-24 17:01:29,782 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:01:29,782 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:01:29,782 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:01:30,047 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:01:30,047 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 17:01:30,053 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:30 BoogieIcfgContainer
[2020-09-24 17:01:30,053 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:01:30,054 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:01:30,054 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:01:30,058 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:01:30,058 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:01:29" (1/3) ...
[2020-09-24 17:01:30,059 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebf3525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:30, skipping insertion in model container
[2020-09-24 17:01:30,060 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:29" (2/3) ...
[2020-09-24 17:01:30,060 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebf3525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:30, skipping insertion in model container
[2020-09-24 17:01:30,061 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:30" (3/3) ...
[2020-09-24 17:01:30,063 INFO  L109   eAbstractionObserver]: Analyzing ICFG Ackermann04.c
[2020-09-24 17:01:30,076 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:01:30,107 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:01:30,161 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:01:30,220 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:01:30,221 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:01:30,221 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:01:30,221 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:01:30,221 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:01:30,221 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:01:30,221 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:01:30,222 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:01:30,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states.
[2020-09-24 17:01:30,250 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-09-24 17:01:30,250 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:30,251 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:30,252 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:30,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:30,258 INFO  L82        PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times
[2020-09-24 17:01:30,267 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:30,268 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257634614]
[2020-09-24 17:01:30,268 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:30,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,424 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,591 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,591 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 17:01:30,591 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:30,592 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 193
[2020-09-24 17:01:30,593 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,593 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:30,594 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:30,594 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 17:01:30,594 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:01:30,678 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:30,679 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,682 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,684 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,684 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:30,685 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:30,685 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 17:01:30,685 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,686 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:30,686 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:30,686 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:30,686 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:30,691 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:30,696 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,702 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,733 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,734 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:30,734 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:30,734 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 35
[2020-09-24 17:01:30,735 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,735 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:30,735 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:30,736 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:30,736 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:30,779 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 17:01:30,780 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257634614]
[2020-09-24 17:01:30,783 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:01:30,783 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 17:01:30,784 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332246816]
[2020-09-24 17:01:30,791 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:01:30,792 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:30,810 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:01:30,811 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:01:30,814 INFO  L87              Difference]: Start difference. First operand 44 states. Second operand 5 states.
[2020-09-24 17:01:30,970 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:30,970 INFO  L93              Difference]: Finished difference Result 88 states and 110 transitions.
[2020-09-24 17:01:30,971 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:01:30,973 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 24
[2020-09-24 17:01:30,974 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:30,989 INFO  L225             Difference]: With dead ends: 88
[2020-09-24 17:01:30,989 INFO  L226             Difference]: Without dead ends: 45
[2020-09-24 17:01:30,995 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 17:01:31,016 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2020-09-24 17:01:31,048 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45.
[2020-09-24 17:01:31,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-09-24 17:01:31,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions.
[2020-09-24 17:01:31,055 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24
[2020-09-24 17:01:31,055 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:31,055 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 52 transitions.
[2020-09-24 17:01:31,055 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:01:31,056 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions.
[2020-09-24 17:01:31,059 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-24 17:01:31,060 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:31,060 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:31,061 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:01:31,061 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:31,061 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:31,062 INFO  L82        PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times
[2020-09-24 17:01:31,062 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:31,062 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462035460]
[2020-09-24 17:01:31,063 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:31,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:31,098 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,144 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,549 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:31,550 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 45
[2020-09-24 17:01:31,550 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:31,550 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 465
[2020-09-24 17:01:31,551 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:31,551 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:31,551 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:31,552 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 24
[2020-09-24 17:01:31,552 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:31,573 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:31,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:31,576 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,578 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:31,578 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:31,579 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:31,579 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 17:01:31,579 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:31,579 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:31,580 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:31,580 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:31,580 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:31,582 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:31,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:31,594 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,634 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:31,635 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 24
[2020-09-24 17:01:31,635 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:31,635 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 45
[2020-09-24 17:01:31,636 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:31,636 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:31,636 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:31,636 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-24 17:01:31,650 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 14
[2020-09-24 17:01:31,684 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:31,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:31,694 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,715 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:31,715 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:31,716 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:31,716 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 24
[2020-09-24 17:01:31,716 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:31,716 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:31,717 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:31,717 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:31,717 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:31,726 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 17:01:31,727 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462035460]
[2020-09-24 17:01:31,728 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:31,728 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 17:01:31,728 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547653635]
[2020-09-24 17:01:31,733 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:01:31,733 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:31,733 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:01:31,734 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:01:31,734 INFO  L87              Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states.
[2020-09-24 17:01:31,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:31,869 INFO  L93              Difference]: Finished difference Result 83 states and 108 transitions.
[2020-09-24 17:01:31,870 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:01:31,870 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-09-24 17:01:31,871 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:31,873 INFO  L225             Difference]: With dead ends: 83
[2020-09-24 17:01:31,873 INFO  L226             Difference]: Without dead ends: 47
[2020-09-24 17:01:31,876 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 17:01:31,877 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2020-09-24 17:01:31,885 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47.
[2020-09-24 17:01:31,886 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2020-09-24 17:01:31,887 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions.
[2020-09-24 17:01:31,888 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 34
[2020-09-24 17:01:31,888 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:31,888 INFO  L479      AbstractCegarLoop]: Abstraction has 47 states and 56 transitions.
[2020-09-24 17:01:31,889 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:01:31,889 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions.
[2020-09-24 17:01:31,891 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 17:01:31,891 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:31,892 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:31,892 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:01:31,892 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:31,893 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:31,893 INFO  L82        PathProgramCache]: Analyzing trace with hash 1685750542, now seen corresponding path program 1 times
[2020-09-24 17:01:31,893 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:31,893 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821163221]
[2020-09-24 17:01:31,894 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:31,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:31,926 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,967 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:32,004 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,365 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:35,365 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 68
[2020-09-24 17:01:35,365 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:35,366 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3451
[2020-09-24 17:01:35,366 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:35,366 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:35,366 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:35,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 47
[2020-09-24 17:01:35,367 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:35,391 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:35,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,394 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,395 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:35,395 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:35,395 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:35,396 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 17:01:35,396 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:35,396 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:35,396 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:35,397 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:35,397 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:35,398 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:35,412 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,423 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,545 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:35,546 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 17:01:35,546 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:35,546 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 131
[2020-09-24 17:01:35,547 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:35,547 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:35,547 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:35,547 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 44
[2020-09-24 17:01:35,548 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:35,573 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:35,579 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,584 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,634 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:35,634 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 24
[2020-09-24 17:01:35,634 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:35,635 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 54
[2020-09-24 17:01:35,635 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:35,636 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:35,636 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:35,636 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-24 17:01:35,637 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:35,665 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:35,667 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,670 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,675 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:35,675 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:35,676 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:35,676 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 17:01:35,676 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:35,681 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:35,681 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:35,682 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:35,682 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-09-24 17:01:35,686 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-24 17:01:35,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,690 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,698 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:35,699 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:35,699 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:35,699 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-24 17:01:35,699 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:35,700 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:35,708 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:35,708 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:35,709 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 9
[2020-09-24 17:01:35,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-09-24 17:01:35,720 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821163221]
[2020-09-24 17:01:35,720 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:35,720 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:01:35,721 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125641905]
[2020-09-24 17:01:35,723 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:01:35,723 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:35,724 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:01:35,725 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:01:35,725 INFO  L87              Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 7 states.
[2020-09-24 17:01:35,898 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:35,898 INFO  L93              Difference]: Finished difference Result 75 states and 97 transitions.
[2020-09-24 17:01:35,900 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:01:35,900 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 53
[2020-09-24 17:01:35,901 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:35,909 INFO  L225             Difference]: With dead ends: 75
[2020-09-24 17:01:35,910 INFO  L226             Difference]: Without dead ends: 69
[2020-09-24 17:01:35,910 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 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 17:01:35,912 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2020-09-24 17:01:35,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2020-09-24 17:01:35,933 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-09-24 17:01:35,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions.
[2020-09-24 17:01:35,938 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 53
[2020-09-24 17:01:35,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:35,938 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 91 transitions.
[2020-09-24 17:01:35,938 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:01:35,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions.
[2020-09-24 17:01:35,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2020-09-24 17:01:35,949 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:35,949 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:35,950 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:01:35,952 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:35,952 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:35,952 INFO  L82        PathProgramCache]: Analyzing trace with hash 1817818703, now seen corresponding path program 2 times
[2020-09-24 17:01:35,953 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:35,953 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408285849]
[2020-09-24 17:01:35,953 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:35,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,992 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:36,037 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:36,177 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:39,012 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:39,012 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 91
[2020-09-24 17:01:39,012 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:39,013 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3034
[2020-09-24 17:01:39,013 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:39,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-24 17:01:39,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:39,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 70
[2020-09-24 17:01:39,014 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:39,039 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:39,040 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:39,041 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:39,042 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:39,042 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:39,043 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:39,043 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 17:01:39,043 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:39,043 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:39,043 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:39,044 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:39,044 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:39,045 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:39,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:39,068 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:39,101 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:39,125 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,319 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,319 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 70
[2020-09-24 17:01:42,319 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:42,320 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3262
[2020-09-24 17:01:42,320 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,320 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-24 17:01:42,320 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:42,321 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 67
[2020-09-24 17:01:42,321 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:42,373 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:42,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,395 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,423 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,945 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,945 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 17:01:42,945 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:42,946 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 557
[2020-09-24 17:01:42,946 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,946 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-24 17:01:42,946 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:42,946 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 44
[2020-09-24 17:01:42,947 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:42,960 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:42,966 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,020 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,021 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 24
[2020-09-24 17:01:43,021 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,021 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 53
[2020-09-24 17:01:43,021 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,022 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 17:01:43,022 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,022 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-24 17:01:43,022 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:43,032 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:43,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,038 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,055 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,056 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:43,056 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,056 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 18
[2020-09-24 17:01:43,056 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,057 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:43,057 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,060 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:43,061 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 17:01:43,085 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-24 17:01:43,086 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,088 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,102 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,103 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:43,104 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,104 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-09-24 17:01:43,104 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,105 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:43,105 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,106 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:43,107 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 17:01:43,113 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2020-09-24 17:01:43,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,117 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,124 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,124 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:43,125 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,125 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 17:01:43,125 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,125 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:43,126 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,126 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:43,126 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:43,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2020-09-24 17:01:43,144 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408285849]
[2020-09-24 17:01:43,144 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:43,144 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:01:43,144 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638690427]
[2020-09-24 17:01:43,146 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:01:43,146 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:43,147 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:01:43,148 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:01:43,148 INFO  L87              Difference]: Start difference. First operand 69 states and 91 transitions. Second operand 6 states.
[2020-09-24 17:01:43,328 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:43,328 INFO  L93              Difference]: Finished difference Result 107 states and 159 transitions.
[2020-09-24 17:01:43,329 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:01:43,329 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 72
[2020-09-24 17:01:43,330 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:43,338 INFO  L225             Difference]: With dead ends: 107
[2020-09-24 17:01:43,338 INFO  L226             Difference]: Without dead ends: 101
[2020-09-24 17:01:43,339 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2020-09-24 17:01:43,341 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-09-24 17:01:43,372 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101.
[2020-09-24 17:01:43,373 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 101 states.
[2020-09-24 17:01:43,378 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 153 transitions.
[2020-09-24 17:01:43,378 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 153 transitions. Word has length 72
[2020-09-24 17:01:43,380 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:43,380 INFO  L479      AbstractCegarLoop]: Abstraction has 101 states and 153 transitions.
[2020-09-24 17:01:43,381 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:01:43,381 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 153 transitions.
[2020-09-24 17:01:43,391 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 180
[2020-09-24 17:01:43,392 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:43,392 INFO  L422         BasicCegarLoop]: trace histogram [17, 17, 17, 11, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:43,392 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 17:01:43,392 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:43,396 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:43,396 INFO  L82        PathProgramCache]: Analyzing trace with hash -1454565455, now seen corresponding path program 3 times
[2020-09-24 17:01:43,396 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:43,397 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857018046]
[2020-09-24 17:01:43,397 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:43,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,487 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,592 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,704 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,796 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:51,456 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:51,574 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:52,995 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:53,061 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:53,171 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:55,969 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:56,049 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:58,275 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:58,510 FATAL L256   erpolLogProxyWrapper]: Now shrinking...