/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label21.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-25 10:08:59,504 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-25 10:08:59,509 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 10:08:59,556 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 10:08:59,556 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 10:08:59,568 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 10:08:59,570 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-25 10:08:59,580 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-25 10:08:59,583 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 10:08:59,587 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 10:08:59,590 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 10:08:59,592 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 10:08:59,593 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 10:08:59,595 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 10:08:59,596 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 10:08:59,607 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 10:08:59,609 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 10:08:59,611 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 10:08:59,612 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 10:08:59,613 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 10:08:59,616 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 10:08:59,616 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 10:08:59,616 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 10:08:59,620 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 10:08:59,620 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 10:08:59,622 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 10:08:59,623 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-09-25 10:08:59,624 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-09-25 10:08:59,627 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 10:08:59,627 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 10:08:59,628 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-25 10:08:59,628 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-25 10:08:59,631 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 10:08:59,632 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
[2020-09-25 10:08:59,679 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-25 10:08:59,679 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 10:08:59,682 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 10:08:59,682 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-25 10:08:59,682 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-25 10:08:59,683 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 10:08:59,683 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-25 10:08:59,683 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-25 10:08:59,683 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-25 10:08:59,684 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-25 10:08:59,685 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 10:08:59,685 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 10:08:59,685 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 10:08:59,686 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-25 10:08:59,686 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-25 10:08:59,686 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-25 10:08:59,686 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-25 10:08:59,687 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 10:08:59,687 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-25 10:08:59,687 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-25 10:08:59,687 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-25 10:08:59,687 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 10:08:59,688 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 10:08:59,688 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 10:08:59,688 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 10:08:59,688 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-25 10:08:59,688 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 10:08:59,689 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 10:08:59,689 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-25 10:08:59,689 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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
[2020-09-25 10:09:00,126 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 10:09:00,151 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 10:09:00,156 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 10:09:00,158 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-25 10:09:00,158 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-25 10:09:00,159 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label21.c
[2020-09-25 10:09:00,252 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87e7d554a/37f512a2f4a4433c930f9449d71fb943/FLAG8806320c3
[2020-09-25 10:09:00,891 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-25 10:09:00,891 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label21.c
[2020-09-25 10:09:00,906 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87e7d554a/37f512a2f4a4433c930f9449d71fb943/FLAG8806320c3
[2020-09-25 10:09:01,143 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/87e7d554a/37f512a2f4a4433c930f9449d71fb943
[2020-09-25 10:09:01,158 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 10:09:01,165 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 10:09:01,166 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 10:09:01,166 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 10:09:01,175 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 10:09:01,176 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:01,181 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d876c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01, skipping insertion in model container
[2020-09-25 10:09:01,181 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:01,190 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-25 10:09:01,264 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-25 10:09:01,690 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 10:09:01,704 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-25 10:09:01,969 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 10:09:01,989 INFO  L208         MainTranslator]: Completed translation
[2020-09-25 10:09:01,989 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01 WrapperNode
[2020-09-25 10:09:01,989 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 10:09:01,990 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 10:09:01,991 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 10:09:01,991 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 10:09:02,005 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,006 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,025 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,025 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,065 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,087 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,098 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (1/1) ...
[2020-09-25 10:09:02,103 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 10:09:02,104 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 10:09:02,104 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 10:09:02,104 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-25 10:09:02,105 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (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
[2020-09-25 10:09:02,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 10:09:02,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 10:09:02,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-25 10:09:02,179 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 10:09:02,179 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-25 10:09:02,179 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 10:09:02,179 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-25 10:09:02,179 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-25 10:09:02,179 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-25 10:09:02,180 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 10:09:02,180 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 10:09:03,572 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 10:09:03,572 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-25 10:09:03,581 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:09:03 BoogieIcfgContainer
[2020-09-25 10:09:03,581 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 10:09:03,583 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 10:09:03,583 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 10:09:03,587 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-25 10:09:03,587 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:09:01" (1/3) ...
[2020-09-25 10:09:03,590 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb4822a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:09:03, skipping insertion in model container
[2020-09-25 10:09:03,590 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:09:01" (2/3) ...
[2020-09-25 10:09:03,590 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb4822a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:09:03, skipping insertion in model container
[2020-09-25 10:09:03,591 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:09:03" (3/3) ...
[2020-09-25 10:09:03,593 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem02_label21.c
[2020-09-25 10:09:03,605 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 10:09:03,617 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 10:09:03,640 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 10:09:03,675 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-25 10:09:03,676 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-25 10:09:03,676 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 10:09:03,676 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 10:09:03,676 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 10:09:03,676 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-25 10:09:03,677 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 10:09:03,677 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 10:09:03,719 INFO  L276                IsEmpty]: Start isEmpty. Operand 527 states.
[2020-09-25 10:09:03,740 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 123
[2020-09-25 10:09:03,740 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 10:09:03,741 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:09:03,742 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:09:03,750 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:09:03,751 INFO  L82        PathProgramCache]: Analyzing trace with hash 1196465745, now seen corresponding path program 1 times
[2020-09-25 10:09:03,762 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:09:03,763 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087928403]
[2020-09-25 10:09:03,763 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:09:04,043 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:04,215 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:04,530 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:05,264 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:06,037 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:06,241 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:06,794 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:06,844 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:09,050 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:09,051 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 131
[2020-09-25 10:09:09,051 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 7
[2020-09-25 10:09:09,051 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4999
[2020-09-25 10:09:09,055 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:09,056 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:09,056 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-25 10:09:09,056 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 22
[2020-09-25 10:09:09,057 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 108
[2020-09-25 10:09:09,057 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-09-25 10:09:09,283 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:09:09,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:09,322 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:09,351 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:09,351 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 10:09:09,352 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:09:09,352 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 35
[2020-09-25 10:09:09,352 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:09,352 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:09,353 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 10:09:09,353 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:09:09,353 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-25 10:09:09,353 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:09,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 10:09:09,407 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087928403]
[2020-09-25 10:09:09,409 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 10:09:09,410 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 10:09:09,411 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423981341]
[2020-09-25 10:09:09,418 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 10:09:09,418 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:09:09,432 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 10:09:09,433 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 10:09:09,436 INFO  L87              Difference]: Start difference. First operand 527 states. Second operand 4 states.
[2020-09-25 10:09:11,691 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:09:11,692 INFO  L93              Difference]: Finished difference Result 1205 states and 1651 transitions.
[2020-09-25 10:09:11,695 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-25 10:09:11,697 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 122
[2020-09-25 10:09:11,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:09:11,725 INFO  L225             Difference]: With dead ends: 1205
[2020-09-25 10:09:11,725 INFO  L226             Difference]: Without dead ends: 627
[2020-09-25 10:09:11,735 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-25 10:09:11,755 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 627 states.
[2020-09-25 10:09:11,831 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613.
[2020-09-25 10:09:11,833 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 613 states.
[2020-09-25 10:09:11,837 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 774 transitions.
[2020-09-25 10:09:11,840 INFO  L78                 Accepts]: Start accepts. Automaton has 613 states and 774 transitions. Word has length 122
[2020-09-25 10:09:11,841 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:09:11,841 INFO  L479      AbstractCegarLoop]: Abstraction has 613 states and 774 transitions.
[2020-09-25 10:09:11,841 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 10:09:11,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 613 states and 774 transitions.
[2020-09-25 10:09:11,855 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2020-09-25 10:09:11,855 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 10:09:11,856 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:09:11,856 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 10:09:11,857 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:09:11,859 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:09:11,859 INFO  L82        PathProgramCache]: Analyzing trace with hash -1331654230, now seen corresponding path program 1 times
[2020-09-25 10:09:11,859 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:09:11,860 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168811417]
[2020-09-25 10:09:11,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:09:11,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:11,904 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:12,071 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:12,350 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:12,601 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:14,500 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:15,116 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:15,116 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 159
[2020-09-25 10:09:15,116 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-25 10:09:15,117 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3229
[2020-09-25 10:09:15,117 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:15,117 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:15,117 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 13
[2020-09-25 10:09:15,118 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-25 10:09:15,118 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 137
[2020-09-25 10:09:15,118 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:15,336 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:09:15,342 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:15,347 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:15,377 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:15,378 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 10:09:15,378 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:09:15,378 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 34
[2020-09-25 10:09:15,378 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:15,379 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:15,379 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:09:15,379 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:09:15,379 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 10:09:15,380 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:15,407 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-25 10:09:15,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:15,419 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:15,481 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:15,552 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:15,553 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-25 10:09:15,553 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:09:15,553 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 137
[2020-09-25 10:09:15,554 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:15,554 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:15,554 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 10:09:15,555 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-25 10:09:15,555 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-25 10:09:15,556 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:15,808 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 10:09:15,809 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168811417]
[2020-09-25 10:09:15,809 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 10:09:15,810 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-25 10:09:15,810 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940705036]
[2020-09-25 10:09:15,812 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-25 10:09:15,812 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:09:15,813 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-25 10:09:15,813 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132
[2020-09-25 10:09:15,813 INFO  L87              Difference]: Start difference. First operand 613 states and 774 transitions. Second operand 12 states.
[2020-09-25 10:09:16,606 WARN  L193               SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62
[2020-09-25 10:09:20,945 WARN  L193               SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62
[2020-09-25 10:09:21,226 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:09:21,227 INFO  L93              Difference]: Finished difference Result 2367 states and 3408 transitions.
[2020-09-25 10:09:21,227 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-25 10:09:21,227 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 148
[2020-09-25 10:09:21,228 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:09:21,246 INFO  L225             Difference]: With dead ends: 2367
[2020-09-25 10:09:21,246 INFO  L226             Difference]: Without dead ends: 1417
[2020-09-25 10:09:21,254 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506
[2020-09-25 10:09:21,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1417 states.
[2020-09-25 10:09:21,347 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1395.
[2020-09-25 10:09:21,347 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1395 states.
[2020-09-25 10:09:21,356 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1825 transitions.
[2020-09-25 10:09:21,357 INFO  L78                 Accepts]: Start accepts. Automaton has 1395 states and 1825 transitions. Word has length 148
[2020-09-25 10:09:21,357 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:09:21,357 INFO  L479      AbstractCegarLoop]: Abstraction has 1395 states and 1825 transitions.
[2020-09-25 10:09:21,358 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-25 10:09:21,358 INFO  L276                IsEmpty]: Start isEmpty. Operand 1395 states and 1825 transitions.
[2020-09-25 10:09:21,366 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 157
[2020-09-25 10:09:21,367 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 10:09:21,367 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:09:21,367 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 10:09:21,367 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:09:21,368 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:09:21,368 INFO  L82        PathProgramCache]: Analyzing trace with hash -578383540, now seen corresponding path program 1 times
[2020-09-25 10:09:21,368 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:09:21,368 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085464809]
[2020-09-25 10:09:21,369 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:09:21,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:21,419 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:21,484 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:21,580 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:22,042 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:22,100 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:22,160 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:25,544 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:25,643 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:26,417 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:26,417 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 167
[2020-09-25 10:09:26,417 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 10:09:26,419 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5017
[2020-09-25 10:09:26,419 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:26,420 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:26,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-25 10:09:26,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 21
[2020-09-25 10:09:26,420 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 136
[2020-09-25 10:09:26,421 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:26,613 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:09:26,617 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:26,629 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:26,651 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:26,652 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 10:09:26,652 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:09:26,652 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 33
[2020-09-25 10:09:26,653 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:26,653 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:26,653 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 10:09:26,654 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:09:26,654 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 10:09:26,654 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:26,679 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-25 10:09:26,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:26,698 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:26,788 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:26,828 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:26,828 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 30
[2020-09-25 10:09:26,828 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:09:26,828 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 136
[2020-09-25 10:09:26,829 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:26,829 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:26,829 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 10:09:26,830 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:09:26,830 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 26
[2020-09-25 10:09:26,830 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:27,067 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 10:09:27,068 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085464809]
[2020-09-25 10:09:27,069 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 10:09:27,069 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 10:09:27,069 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914967298]
[2020-09-25 10:09:27,070 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 10:09:27,070 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:09:27,071 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 10:09:27,071 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110
[2020-09-25 10:09:27,071 INFO  L87              Difference]: Start difference. First operand 1395 states and 1825 transitions. Second operand 11 states.
[2020-09-25 10:09:30,626 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:09:30,627 INFO  L93              Difference]: Finished difference Result 3037 states and 4059 transitions.
[2020-09-25 10:09:30,627 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-09-25 10:09:30,627 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 156
[2020-09-25 10:09:30,631 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:09:30,642 INFO  L225             Difference]: With dead ends: 3037
[2020-09-25 10:09:30,643 INFO  L226             Difference]: Without dead ends: 1404
[2020-09-25 10:09:30,651 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342
[2020-09-25 10:09:30,654 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1404 states.
[2020-09-25 10:09:30,700 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1070.
[2020-09-25 10:09:30,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1070 states.
[2020-09-25 10:09:30,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1283 transitions.
[2020-09-25 10:09:30,706 INFO  L78                 Accepts]: Start accepts. Automaton has 1070 states and 1283 transitions. Word has length 156
[2020-09-25 10:09:30,706 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:09:30,706 INFO  L479      AbstractCegarLoop]: Abstraction has 1070 states and 1283 transitions.
[2020-09-25 10:09:30,706 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 10:09:30,707 INFO  L276                IsEmpty]: Start isEmpty. Operand 1070 states and 1283 transitions.
[2020-09-25 10:09:30,712 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 169
[2020-09-25 10:09:30,713 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 10:09:30,713 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:09:30,717 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 10:09:30,717 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:09:30,717 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:09:30,718 INFO  L82        PathProgramCache]: Analyzing trace with hash -866360781, now seen corresponding path program 1 times
[2020-09-25 10:09:30,718 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:09:30,719 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964160709]
[2020-09-25 10:09:30,720 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:09:30,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:30,797 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:31,153 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:31,291 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:31,423 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:32,162 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:32,701 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:32,998 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:33,888 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:35,540 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:35,783 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:35,783 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 179
[2020-09-25 10:09:35,783 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 9
[2020-09-25 10:09:35,783 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5012
[2020-09-25 10:09:35,784 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:35,784 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:35,784 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 13
[2020-09-25 10:09:35,784 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-25 10:09:35,784 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 146
[2020-09-25 10:09:35,785 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:35,968 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:09:35,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:35,978 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:36,005 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:36,005 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 10:09:36,005 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:09:36,006 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 31
[2020-09-25 10:09:36,006 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:36,006 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:36,006 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:09:36,006 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:09:36,007 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 10:09:36,007 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 10:09:36,034 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-25 10:09:36,042 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:36,051 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:36,191 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:36,242 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:36,243 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-25 10:09:36,243 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:09:36,244 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 199
[2020-09-25 10:09:36,244 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:36,245 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:36,245 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 10:09:36,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-25 10:09:36,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 41
[2020-09-25 10:09:36,246 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-25 10:09:36,909 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 10:09:36,910 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964160709]
[2020-09-25 10:09:36,910 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 10:09:36,911 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-25 10:09:36,911 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825572435]
[2020-09-25 10:09:36,912 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-25 10:09:36,912 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:09:36,913 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-25 10:09:36,914 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132
[2020-09-25 10:09:36,914 INFO  L87              Difference]: Start difference. First operand 1070 states and 1283 transitions. Second operand 12 states.
[2020-09-25 10:09:39,341 WARN  L193               SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58
[2020-09-25 10:09:40,187 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57
[2020-09-25 10:09:40,842 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56
[2020-09-25 10:09:42,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:09:42,410 INFO  L93              Difference]: Finished difference Result 1942 states and 2175 transitions.
[2020-09-25 10:09:42,410 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-09-25 10:09:42,410 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 168
[2020-09-25 10:09:42,411 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:09:42,420 INFO  L225             Difference]: With dead ends: 1942
[2020-09-25 10:09:42,420 INFO  L226             Difference]: Without dead ends: 1377
[2020-09-25 10:09:42,423 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600
[2020-09-25 10:09:42,426 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1377 states.
[2020-09-25 10:09:42,458 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1051.
[2020-09-25 10:09:42,458 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1051 states.
[2020-09-25 10:09:42,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1254 transitions.
[2020-09-25 10:09:42,463 INFO  L78                 Accepts]: Start accepts. Automaton has 1051 states and 1254 transitions. Word has length 168
[2020-09-25 10:09:42,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:09:42,463 INFO  L479      AbstractCegarLoop]: Abstraction has 1051 states and 1254 transitions.
[2020-09-25 10:09:42,463 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-25 10:09:42,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 1051 states and 1254 transitions.
[2020-09-25 10:09:42,468 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 174
[2020-09-25 10:09:42,468 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 10:09:42,469 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:09:42,469 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 10:09:42,469 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:09:42,469 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:09:42,469 INFO  L82        PathProgramCache]: Analyzing trace with hash -2120706846, now seen corresponding path program 1 times
[2020-09-25 10:09:42,470 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:09:42,470 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259893325]
[2020-09-25 10:09:42,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:09:42,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:42,522 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:42,585 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:42,708 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:43,743 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:43,872 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:45,147 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:45,992 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:45,992 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 184
[2020-09-25 10:09:45,993 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 6
[2020-09-25 10:09:45,993 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3491
[2020-09-25 10:09:45,993 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:45,993 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:45,993 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 10:09:45,994 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-09-25 10:09:45,994 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 164
[2020-09-25 10:09:45,994 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:09:46,092 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:09:46,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:46,102 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:46,119 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:46,120 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 10:09:46,120 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:09:46,120 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-09-25 10:09:46,120 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:46,120 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:46,120 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 10:09:46,121 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:09:46,121 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-09-25 10:09:46,121 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 10:09:46,142 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-25 10:09:46,151 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:46,161 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:46,208 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:46,254 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:09:46,254 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-25 10:09:46,254 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:09:46,254 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 102
[2020-09-25 10:09:46,254 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:09:46,255 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:09:46,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 10:09:46,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-25 10:09:46,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 46
[2020-09-25 10:09:46,255 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 10:09:46,329 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2020-09-25 10:09:46,329 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259893325]
[2020-09-25 10:09:46,330 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 10:09:46,330 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-25 10:09:46,330 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587320677]
[2020-09-25 10:09:46,331 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-25 10:09:46,331 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:09:46,331 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-25 10:09:46,332 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-09-25 10:09:46,332 INFO  L87              Difference]: Start difference. First operand 1051 states and 1254 transitions. Second operand 6 states.
[2020-09-25 10:09:48,280 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:09:48,281 INFO  L93              Difference]: Finished difference Result 2750 states and 3399 transitions.
[2020-09-25 10:09:48,285 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-25 10:09:48,285 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 173
[2020-09-25 10:09:48,287 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:09:48,296 INFO  L225             Difference]: With dead ends: 2750
[2020-09-25 10:09:48,297 INFO  L226             Difference]: Without dead ends: 1563
[2020-09-25 10:09:48,302 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-09-25 10:09:48,305 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1563 states.
[2020-09-25 10:09:48,353 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1521.
[2020-09-25 10:09:48,354 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1521 states.
[2020-09-25 10:09:48,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1786 transitions.
[2020-09-25 10:09:48,360 INFO  L78                 Accepts]: Start accepts. Automaton has 1521 states and 1786 transitions. Word has length 173
[2020-09-25 10:09:48,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:09:48,361 INFO  L479      AbstractCegarLoop]: Abstraction has 1521 states and 1786 transitions.
[2020-09-25 10:09:48,361 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-25 10:09:48,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 1521 states and 1786 transitions.
[2020-09-25 10:09:48,368 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 191
[2020-09-25 10:09:48,368 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 10:09:48,368 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:09:48,369 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 10:09:48,369 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:09:48,369 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:09:48,369 INFO  L82        PathProgramCache]: Analyzing trace with hash 1865147849, now seen corresponding path program 1 times
[2020-09-25 10:09:48,369 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:09:48,370 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127321687]
[2020-09-25 10:09:48,370 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:09:48,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:09:48,425 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:48,629 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:48,711 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:48,899 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:09:49,540 FATAL L256   erpolLogProxyWrapper]: Now shrinking...