/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:04:22,031 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:04:22,034 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:04:22,077 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:04:22,077 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
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[2020-09-24 15:04:22,109 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:04:22,110 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:04:22,112 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:04:22,120 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:04:22,123 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:04:22,124 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:04:22,125 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:04:22,125 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:04:22,137 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-09-24 15:04:22,157 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 15:04:22,158 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:04:22,159 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 15:04:22,185 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 15:04:22,185 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:04:22,186 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:04:22,186 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 15:04:22,187 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 15:04:22,187 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:04:22,187 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 15:04:22,187 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 15:04:22,187 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 15:04:22,188 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 15:04:22,188 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:04:22,188 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:04:22,188 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:04:22,189 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 15:04:22,189 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 15:04:22,189 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 15:04:22,189 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:04:22,189 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:04:22,190 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 15:04:22,190 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 15:04:22,190 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 15:04:22,190 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:04:22,190 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:04:22,191 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:04:22,191 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:04:22,191 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 15:04:22,191 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:04:22,192 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:04:22,192 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 15:04:22,192 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 -> false
[2020-09-24 15:04:22,662 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:04:22,678 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:04:22,683 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:04:22,684 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 15:04:22,685 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 15:04:22,686 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c
[2020-09-24 15:04:22,782 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08503aa57/50e3022043bd4246a869238444c5cb20/FLAG73b4353ad
[2020-09-24 15:04:23,516 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 15:04:23,518 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c
[2020-09-24 15:04:23,539 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08503aa57/50e3022043bd4246a869238444c5cb20/FLAG73b4353ad
[2020-09-24 15:04:23,708 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08503aa57/50e3022043bd4246a869238444c5cb20
[2020-09-24 15:04:23,724 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:04:23,730 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:04:23,731 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:04:23,732 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:04:23,736 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:04:23,737 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:23" (1/1) ...
[2020-09-24 15:04:23,742 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5781f29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:23, skipping insertion in model container
[2020-09-24 15:04:23,742 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:23" (1/1) ...
[2020-09-24 15:04:23,752 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 15:04:23,811 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:04:24,452 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:04:24,458 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 15:04:24,672 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:04:24,699 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 15:04:24,701 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24 WrapperNode
[2020-09-24 15:04:24,701 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:04:24,702 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:04:24,702 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:04:24,703 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:04:24,727 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,729 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,770 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,770 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,834 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,851 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,860 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (1/1) ...
[2020-09-24 15:04:24,871 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:04:24,871 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:04:24,872 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:04:24,872 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:04:24,873 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (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 15:04:24,988 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:04:24,988 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:04:24,989 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 15:04:24,989 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:04:24,989 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 15:04:24,990 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:04:24,990 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 15:04:24,991 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 15:04:24,991 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:04:24,991 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:04:24,992 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:04:26,992 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:04:26,992 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 15:04:27,005 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:27 BoogieIcfgContainer
[2020-09-24 15:04:27,005 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:04:27,007 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:04:27,007 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:04:27,011 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:04:27,011 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:04:23" (1/3) ...
[2020-09-24 15:04:27,012 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f54828e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:27, skipping insertion in model container
[2020-09-24 15:04:27,013 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:24" (2/3) ...
[2020-09-24 15:04:27,013 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f54828e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:27, skipping insertion in model container
[2020-09-24 15:04:27,013 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:27" (3/3) ...
[2020-09-24 15:04:27,016 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem14_label24.c
[2020-09-24 15:04:27,027 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:04:27,039 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:04:27,062 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:04:27,105 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:04:27,105 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 15:04:27,105 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:04:27,105 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:04:27,105 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:04:27,106 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 15:04:27,106 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:04:27,106 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:04:27,146 INFO  L276                IsEmpty]: Start isEmpty. Operand 678 states.
[2020-09-24 15:04:27,159 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 61
[2020-09-24 15:04:27,159 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:27,161 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]
[2020-09-24 15:04:27,161 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:27,168 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:27,168 INFO  L82        PathProgramCache]: Analyzing trace with hash -444760420, now seen corresponding path program 1 times
[2020-09-24 15:04:27,177 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:27,178 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129489333]
[2020-09-24 15:04:27,178 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:27,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:27,558 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:27,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:27,613 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 15:04:27,614 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129489333]
[2020-09-24 15:04:27,617 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:04:27,617 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:04:27,618 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348303769]
[2020-09-24 15:04:27,626 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:04:27,626 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:27,645 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:04:27,646 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:04:27,649 INFO  L87              Difference]: Start difference. First operand 678 states. Second operand 5 states.
[2020-09-24 15:04:31,560 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:04:31,560 INFO  L93              Difference]: Finished difference Result 1766 states and 2493 transitions.
[2020-09-24 15:04:31,561 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 15:04:31,563 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 60
[2020-09-24 15:04:31,564 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:04:31,609 INFO  L225             Difference]: With dead ends: 1766
[2020-09-24 15:04:31,610 INFO  L226             Difference]: Without dead ends: 1025
[2020-09-24 15:04:31,626 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-09-24 15:04:31,653 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1025 states.
[2020-09-24 15:04:31,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 995.
[2020-09-24 15:04:31,766 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 995 states.
[2020-09-24 15:04:31,773 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1343 transitions.
[2020-09-24 15:04:31,776 INFO  L78                 Accepts]: Start accepts. Automaton has 995 states and 1343 transitions. Word has length 60
[2020-09-24 15:04:31,777 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:04:31,778 INFO  L479      AbstractCegarLoop]: Abstraction has 995 states and 1343 transitions.
[2020-09-24 15:04:31,778 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:04:31,778 INFO  L276                IsEmpty]: Start isEmpty. Operand 995 states and 1343 transitions.
[2020-09-24 15:04:31,797 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 145
[2020-09-24 15:04:31,797 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:31,798 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, 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]
[2020-09-24 15:04:31,798 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:04:31,799 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:31,799 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:31,800 INFO  L82        PathProgramCache]: Analyzing trace with hash -1341419890, now seen corresponding path program 1 times
[2020-09-24 15:04:31,800 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:31,800 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182150371]
[2020-09-24 15:04:31,801 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:31,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:31,998 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:32,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:32,027 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:04:32,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:32,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:04:32,201 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182150371]
[2020-09-24 15:04:32,201 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:04:32,201 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-24 15:04:32,202 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554992309]
[2020-09-24 15:04:32,204 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 15:04:32,204 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:32,204 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 15:04:32,205 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-09-24 15:04:32,205 INFO  L87              Difference]: Start difference. First operand 995 states and 1343 transitions. Second operand 8 states.
[2020-09-24 15:04:34,939 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:04:34,939 INFO  L93              Difference]: Finished difference Result 2228 states and 3074 transitions.
[2020-09-24 15:04:34,940 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-09-24 15:04:34,940 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 144
[2020-09-24 15:04:34,941 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:04:34,951 INFO  L225             Difference]: With dead ends: 2228
[2020-09-24 15:04:34,951 INFO  L226             Difference]: Without dead ends: 1248
[2020-09-24 15:04:34,958 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156
[2020-09-24 15:04:34,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1248 states.
[2020-09-24 15:04:35,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1001.
[2020-09-24 15:04:35,011 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1001 states.
[2020-09-24 15:04:35,016 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1253 transitions.
[2020-09-24 15:04:35,016 INFO  L78                 Accepts]: Start accepts. Automaton has 1001 states and 1253 transitions. Word has length 144
[2020-09-24 15:04:35,019 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:04:35,019 INFO  L479      AbstractCegarLoop]: Abstraction has 1001 states and 1253 transitions.
[2020-09-24 15:04:35,019 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 15:04:35,020 INFO  L276                IsEmpty]: Start isEmpty. Operand 1001 states and 1253 transitions.
[2020-09-24 15:04:35,025 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 155
[2020-09-24 15:04:35,026 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:35,027 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, 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]
[2020-09-24 15:04:35,027 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:04:35,027 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:35,028 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:35,029 INFO  L82        PathProgramCache]: Analyzing trace with hash 433973778, now seen corresponding path program 1 times
[2020-09-24 15:04:35,029 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:35,030 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596264490]
[2020-09-24 15:04:35,030 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:35,069 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:35,177 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:35,182 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:35,236 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:04:35,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:35,395 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:04:35,396 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596264490]
[2020-09-24 15:04:35,396 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:04:35,396 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-09-24 15:04:35,396 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106815644]
[2020-09-24 15:04:35,397 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 15:04:35,397 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:35,398 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 15:04:35,398 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-09-24 15:04:35,398 INFO  L87              Difference]: Start difference. First operand 1001 states and 1253 transitions. Second operand 9 states.
[2020-09-24 15:04:39,874 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:04:39,907 INFO  L93              Difference]: Finished difference Result 2437 states and 3097 transitions.
[2020-09-24 15:04:39,908 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-09-24 15:04:39,908 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 154
[2020-09-24 15:04:39,909 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:04:39,919 INFO  L225             Difference]: With dead ends: 2437
[2020-09-24 15:04:39,919 INFO  L226             Difference]: Without dead ends: 1451
[2020-09-24 15:04:39,924 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306
[2020-09-24 15:04:39,926 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1451 states.
[2020-09-24 15:04:39,965 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1194.
[2020-09-24 15:04:39,966 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1194 states.
[2020-09-24 15:04:39,971 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1467 transitions.
[2020-09-24 15:04:39,971 INFO  L78                 Accepts]: Start accepts. Automaton has 1194 states and 1467 transitions. Word has length 154
[2020-09-24 15:04:39,972 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:04:39,972 INFO  L479      AbstractCegarLoop]: Abstraction has 1194 states and 1467 transitions.
[2020-09-24 15:04:39,972 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 15:04:39,973 INFO  L276                IsEmpty]: Start isEmpty. Operand 1194 states and 1467 transitions.
[2020-09-24 15:04:39,976 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 238
[2020-09-24 15:04:39,976 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:39,977 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:39,977 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:04:39,977 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:39,978 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:39,978 INFO  L82        PathProgramCache]: Analyzing trace with hash -851647883, now seen corresponding path program 1 times
[2020-09-24 15:04:39,978 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:39,979 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229307816]
[2020-09-24 15:04:39,979 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:40,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:40,150 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:40,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:40,191 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:04:40,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:40,284 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104
[2020-09-24 15:04:40,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:40,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 88 proven. 68 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-09-24 15:04:40,424 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229307816]
[2020-09-24 15:04:40,424 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:04:40,424 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 15:04:40,425 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689670421]
[2020-09-24 15:04:40,426 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 15:04:40,426 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:40,426 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 15:04:40,427 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-09-24 15:04:40,427 INFO  L87              Difference]: Start difference. First operand 1194 states and 1467 transitions. Second operand 9 states.
[2020-09-24 15:04:45,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:04:45,198 INFO  L93              Difference]: Finished difference Result 2478 states and 3100 transitions.
[2020-09-24 15:04:45,199 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-09-24 15:04:45,199 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 237
[2020-09-24 15:04:45,200 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:04:45,207 INFO  L225             Difference]: With dead ends: 2478
[2020-09-24 15:04:45,207 INFO  L226             Difference]: Without dead ends: 1490
[2020-09-24 15:04:45,211 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306
[2020-09-24 15:04:45,214 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1490 states.
[2020-09-24 15:04:45,245 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1435.
[2020-09-24 15:04:45,245 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1435 states.
[2020-09-24 15:04:45,251 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1736 transitions.
[2020-09-24 15:04:45,251 INFO  L78                 Accepts]: Start accepts. Automaton has 1435 states and 1736 transitions. Word has length 237
[2020-09-24 15:04:45,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:04:45,252 INFO  L479      AbstractCegarLoop]: Abstraction has 1435 states and 1736 transitions.
[2020-09-24 15:04:45,253 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 15:04:45,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 1435 states and 1736 transitions.
[2020-09-24 15:04:45,257 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 248
[2020-09-24 15:04:45,257 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:45,258 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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]
[2020-09-24 15:04:45,258 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 15:04:45,259 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:45,260 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:45,260 INFO  L82        PathProgramCache]: Analyzing trace with hash -1665918402, now seen corresponding path program 1 times
[2020-09-24 15:04:45,260 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:45,261 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878204455]
[2020-09-24 15:04:45,261 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:45,324 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:45,443 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:45,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:45,467 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:04:45,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:45,579 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114
[2020-09-24 15:04:45,592 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:46,005 INFO  L134       CoverageAnalysis]: Checked inductivity of 177 backedges. 124 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 15:04:46,006 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878204455]
[2020-09-24 15:04:46,006 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:04:46,006 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 15:04:46,007 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125939950]
[2020-09-24 15:04:46,007 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 15:04:46,008 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:46,008 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 15:04:46,008 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2020-09-24 15:04:46,008 INFO  L87              Difference]: Start difference. First operand 1435 states and 1736 transitions. Second operand 11 states.
[2020-09-24 15:04:51,565 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:04:51,565 INFO  L93              Difference]: Finished difference Result 3479 states and 4213 transitions.
[2020-09-24 15:04:51,571 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-09-24 15:04:51,572 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 247
[2020-09-24 15:04:51,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:04:51,582 INFO  L225             Difference]: With dead ends: 3479
[2020-09-24 15:04:51,582 INFO  L226             Difference]: Without dead ends: 2102
[2020-09-24 15:04:51,587 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650
[2020-09-24 15:04:51,591 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2102 states.
[2020-09-24 15:04:51,639 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1841.
[2020-09-24 15:04:51,640 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1841 states.
[2020-09-24 15:04:51,646 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2165 transitions.
[2020-09-24 15:04:51,646 INFO  L78                 Accepts]: Start accepts. Automaton has 1841 states and 2165 transitions. Word has length 247
[2020-09-24 15:04:51,647 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:04:51,647 INFO  L479      AbstractCegarLoop]: Abstraction has 1841 states and 2165 transitions.
[2020-09-24 15:04:51,647 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 15:04:51,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 1841 states and 2165 transitions.
[2020-09-24 15:04:51,651 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 273
[2020-09-24 15:04:51,652 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:51,652 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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]
[2020-09-24 15:04:51,652 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 15:04:51,653 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:51,653 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:51,653 INFO  L82        PathProgramCache]: Analyzing trace with hash -1052374614, now seen corresponding path program 1 times
[2020-09-24 15:04:51,653 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:51,654 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751349375]
[2020-09-24 15:04:51,654 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:51,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:51,811 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:51,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:51,826 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:04:51,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:51,939 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139
[2020-09-24 15:04:51,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:52,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2020-09-24 15:04:52,052 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751349375]
[2020-09-24 15:04:52,053 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:04:52,054 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 15:04:52,054 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549371187]
[2020-09-24 15:04:52,055 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:04:52,055 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:52,065 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:04:52,066 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:04:52,066 INFO  L87              Difference]: Start difference. First operand 1841 states and 2165 transitions. Second operand 5 states.
[2020-09-24 15:04:55,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:04:55,551 INFO  L93              Difference]: Finished difference Result 5185 states and 6203 transitions.
[2020-09-24 15:04:55,554 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 15:04:55,554 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 272
[2020-09-24 15:04:55,555 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:04:55,570 INFO  L225             Difference]: With dead ends: 5185
[2020-09-24 15:04:55,570 INFO  L226             Difference]: Without dead ends: 3359
[2020-09-24 15:04:55,576 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:04:55,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3359 states.
[2020-09-24 15:04:55,665 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2997.
[2020-09-24 15:04:55,666 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2997 states.
[2020-09-24 15:04:55,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3477 transitions.
[2020-09-24 15:04:55,682 INFO  L78                 Accepts]: Start accepts. Automaton has 2997 states and 3477 transitions. Word has length 272
[2020-09-24 15:04:55,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:04:55,683 INFO  L479      AbstractCegarLoop]: Abstraction has 2997 states and 3477 transitions.
[2020-09-24 15:04:55,683 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:04:55,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 2997 states and 3477 transitions.
[2020-09-24 15:04:55,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 386
[2020-09-24 15:04:55,694 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:04:55,694 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:55,695 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 15:04:55,695 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:04:55,695 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:04:55,696 INFO  L82        PathProgramCache]: Analyzing trace with hash -1740644434, now seen corresponding path program 1 times
[2020-09-24 15:04:55,696 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:04:55,696 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796456454]
[2020-09-24 15:04:55,696 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:04:55,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:55,951 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:04:55,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:55,980 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:04:56,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:56,081 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139
[2020-09-24 15:04:56,102 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:56,222 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262
[2020-09-24 15:04:56,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:04:56,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 407 backedges. 169 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-09-24 15:04:56,540 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796456454]
[2020-09-24 15:04:56,540 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:04:56,541 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-24 15:04:56,541 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393787902]
[2020-09-24 15:04:56,542 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-24 15:04:56,542 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:04:56,543 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-24 15:04:56,543 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156
[2020-09-24 15:04:56,543 INFO  L87              Difference]: Start difference. First operand 2997 states and 3477 transitions. Second operand 13 states.
[2020-09-24 15:05:05,246 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:05:05,246 INFO  L93              Difference]: Finished difference Result 7286 states and 8901 transitions.
[2020-09-24 15:05:05,247 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-09-24 15:05:05,247 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 385
[2020-09-24 15:05:05,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:05:05,268 INFO  L225             Difference]: With dead ends: 7286
[2020-09-24 15:05:05,268 INFO  L226             Difference]: Without dead ends: 4686
[2020-09-24 15:05:05,276 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980
[2020-09-24 15:05:05,281 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4686 states.
[2020-09-24 15:05:05,385 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3987.
[2020-09-24 15:05:05,386 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3987 states.
[2020-09-24 15:05:05,395 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 4792 transitions.
[2020-09-24 15:05:05,395 INFO  L78                 Accepts]: Start accepts. Automaton has 3987 states and 4792 transitions. Word has length 385
[2020-09-24 15:05:05,396 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:05:05,396 INFO  L479      AbstractCegarLoop]: Abstraction has 3987 states and 4792 transitions.
[2020-09-24 15:05:05,396 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-24 15:05:05,396 INFO  L276                IsEmpty]: Start isEmpty. Operand 3987 states and 4792 transitions.
[2020-09-24 15:05:05,416 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 586
[2020-09-24 15:05:05,416 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:05:05,417 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-09-24 15:05:05,417 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 15:05:05,417 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:05:05,418 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:05:05,418 INFO  L82        PathProgramCache]: Analyzing trace with hash -1101951350, now seen corresponding path program 1 times
[2020-09-24 15:05:05,418 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:05:05,420 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628575870]
[2020-09-24 15:05:05,420 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:05:05,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:05,659 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:05:05,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:05,674 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:05:05,679 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:05,708 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139
[2020-09-24 15:05:05,735 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:05,780 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257
[2020-09-24 15:05:05,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:05,842 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339
[2020-09-24 15:05:05,859 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:05,893 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462
[2020-09-24 15:05:05,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:06,095 INFO  L134       CoverageAnalysis]: Checked inductivity of 1118 backedges. 417 proven. 140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked.
[2020-09-24 15:05:06,096 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628575870]
[2020-09-24 15:05:06,096 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:05:06,096 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 15:05:06,096 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617988050]
[2020-09-24 15:05:06,097 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 15:05:06,098 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:05:06,098 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 15:05:06,098 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-09-24 15:05:06,098 INFO  L87              Difference]: Start difference. First operand 3987 states and 4792 transitions. Second operand 7 states.
[2020-09-24 15:05:09,945 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:05:09,945 INFO  L93              Difference]: Finished difference Result 9487 states and 11791 transitions.
[2020-09-24 15:05:09,950 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-09-24 15:05:09,951 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 585
[2020-09-24 15:05:09,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:05:09,976 INFO  L225             Difference]: With dead ends: 9487
[2020-09-24 15:05:09,976 INFO  L226             Difference]: Without dead ends: 5897
[2020-09-24 15:05:09,988 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-09-24 15:05:09,995 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5897 states.
[2020-09-24 15:05:10,123 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 5864.
[2020-09-24 15:05:10,123 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5864 states.
[2020-09-24 15:05:10,135 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 7124 transitions.
[2020-09-24 15:05:10,136 INFO  L78                 Accepts]: Start accepts. Automaton has 5864 states and 7124 transitions. Word has length 585
[2020-09-24 15:05:10,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:05:10,137 INFO  L479      AbstractCegarLoop]: Abstraction has 5864 states and 7124 transitions.
[2020-09-24 15:05:10,137 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 15:05:10,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 5864 states and 7124 transitions.
[2020-09-24 15:05:10,158 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 597
[2020-09-24 15:05:10,159 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:05:10,162 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-09-24 15:05:10,162 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 15:05:10,163 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:05:10,163 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:05:10,163 INFO  L82        PathProgramCache]: Analyzing trace with hash 342263436, now seen corresponding path program 1 times
[2020-09-24 15:05:10,163 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:05:10,164 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972096642]
[2020-09-24 15:05:10,164 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:05:10,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:10,451 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:05:10,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:10,474 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:05:10,494 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:10,532 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139
[2020-09-24 15:05:10,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:10,599 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257
[2020-09-24 15:05:10,615 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:10,679 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350
[2020-09-24 15:05:10,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:10,928 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 473
[2020-09-24 15:05:10,938 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:11,452 INFO  L134       CoverageAnalysis]: Checked inductivity of 1156 backedges. 586 proven. 81 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked.
[2020-09-24 15:05:11,452 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972096642]
[2020-09-24 15:05:11,453 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:05:11,453 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 15:05:11,453 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585114062]
[2020-09-24 15:05:11,454 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 15:05:11,455 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:05:11,455 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 15:05:11,455 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2020-09-24 15:05:11,455 INFO  L87              Difference]: Start difference. First operand 5864 states and 7124 transitions. Second operand 9 states.
[2020-09-24 15:05:17,202 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:05:17,203 INFO  L93              Difference]: Finished difference Result 12164 states and 14788 transitions.
[2020-09-24 15:05:17,204 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-09-24 15:05:17,204 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 596
[2020-09-24 15:05:17,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:05:17,227 INFO  L225             Difference]: With dead ends: 12164
[2020-09-24 15:05:17,227 INFO  L226             Difference]: Without dead ends: 5935
[2020-09-24 15:05:17,245 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420
[2020-09-24 15:05:17,253 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5935 states.
[2020-09-24 15:05:17,357 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5320.
[2020-09-24 15:05:17,358 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5320 states.
[2020-09-24 15:05:17,367 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 6136 transitions.
[2020-09-24 15:05:17,368 INFO  L78                 Accepts]: Start accepts. Automaton has 5320 states and 6136 transitions. Word has length 596
[2020-09-24 15:05:17,368 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:05:17,369 INFO  L479      AbstractCegarLoop]: Abstraction has 5320 states and 6136 transitions.
[2020-09-24 15:05:17,369 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 15:05:17,369 INFO  L276                IsEmpty]: Start isEmpty. Operand 5320 states and 6136 transitions.
[2020-09-24 15:05:17,379 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 614
[2020-09-24 15:05:17,379 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:05:17,380 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-09-24 15:05:17,380 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-24 15:05:17,380 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:05:17,380 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:05:17,381 INFO  L82        PathProgramCache]: Analyzing trace with hash 1727822782, now seen corresponding path program 1 times
[2020-09-24 15:05:17,381 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:05:17,381 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879568227]
[2020-09-24 15:05:17,381 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:05:17,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:17,659 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:05:17,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:17,677 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 15:05:17,692 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:17,719 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139
[2020-09-24 15:05:17,735 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:17,769 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257
[2020-09-24 15:05:17,785 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:17,912 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367
[2020-09-24 15:05:17,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:18,107 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490
[2020-09-24 15:05:18,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:05:18,758 INFO  L134       CoverageAnalysis]: Checked inductivity of 1204 backedges. 731 proven. 217 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked.
[2020-09-24 15:05:18,759 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879568227]
[2020-09-24 15:05:18,759 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 15:05:18,759 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-24 15:05:18,759 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111382505]
[2020-09-24 15:05:18,760 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-24 15:05:18,760 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:05:18,760 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-24 15:05:18,761 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156
[2020-09-24 15:05:18,761 INFO  L87              Difference]: Start difference. First operand 5320 states and 6136 transitions. Second operand 13 states.