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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 22:02:51,800 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-14 22:02:51,879 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 22:02:51,900 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 22:02:51,900 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 22:02:51,902 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 22:02:51,903 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 22:02:51,903 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 22:02:51,903 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 22:02:51,903 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 22:02:51,904 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 22:02:51,904 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 22:02:51,904 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 22:02:51,905 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 22:02:51,905 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 22:02:51,905 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 22:02:51,906 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 22:02:51,906 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 22:02:51,906 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 22:02:51,907 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 22:02:51,907 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 22:02:51,907 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 22:02:51,907 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 22:02:51,908 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 22:02:51,908 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:02:51,908 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 22:02:51,908 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 22:02:51,908 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 22:02:51,909 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 22:02:51,909 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 22:02:51,909 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 22:02:51,909 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 22:02:52,183 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 22:02:52,203 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 22:02:52,206 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 22:02:52,208 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 22:02:52,208 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 22:02:52,209 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c
[2019-10-14 22:02:52,283 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb88696c/5b496d0eb4844791bb276ba46875aaa6/FLAG923f08f0d
[2019-10-14 22:02:52,960 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 22:02:52,961 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label23.c
[2019-10-14 22:02:52,983 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb88696c/5b496d0eb4844791bb276ba46875aaa6/FLAG923f08f0d
[2019-10-14 22:02:53,104 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb88696c/5b496d0eb4844791bb276ba46875aaa6
[2019-10-14 22:02:53,115 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 22:02:53,116 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 22:02:53,117 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 22:02:53,117 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 22:02:53,121 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 22:02:53,122 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:53" (1/1) ...
[2019-10-14 22:02:53,124 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404140b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:53, skipping insertion in model container
[2019-10-14 22:02:53,125 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:53" (1/1) ...
[2019-10-14 22:02:53,133 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 22:02:53,214 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 22:02:54,204 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:02:54,210 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 22:02:54,594 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:02:54,615 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 22:02:54,616 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54 WrapperNode
[2019-10-14 22:02:54,617 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 22:02:54,618 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 22:02:54,618 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 22:02:54,618 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 22:02:54,634 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,634 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,684 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,685 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,760 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,789 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,806 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
[2019-10-14 22:02:54,827 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 22:02:54,828 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 22:02:54,829 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 22:02:54,829 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 22:02:54,830 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (1/1) ...
No working directory specified, using /storage/repos/ultimate/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
[2019-10-14 22:02:54,896 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 22:02:54,896 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 22:02:54,896 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 22:02:54,897 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 22:02:54,897 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 22:02:54,897 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 22:02:54,897 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 22:02:54,897 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 22:02:54,897 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 22:02:54,898 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 22:02:54,898 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 22:02:54,898 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 22:02:54,898 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 22:02:58,277 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 22:02:58,277 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 22:02:58,279 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:58 BoogieIcfgContainer
[2019-10-14 22:02:58,279 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 22:02:58,280 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 22:02:58,280 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 22:02:58,285 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 22:02:58,285 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:53" (1/3) ...
[2019-10-14 22:02:58,286 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5356f9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:58, skipping insertion in model container
[2019-10-14 22:02:58,286 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:54" (2/3) ...
[2019-10-14 22:02:58,287 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5356f9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:58, skipping insertion in model container
[2019-10-14 22:02:58,288 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:58" (3/3) ...
[2019-10-14 22:02:58,289 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem15_label23.c
[2019-10-14 22:02:58,301 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 22:02:58,312 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 22:02:58,324 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 22:02:58,361 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 22:02:58,362 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 22:02:58,362 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 22:02:58,362 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 22:02:58,362 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 22:02:58,362 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 22:02:58,363 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 22:02:58,363 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 22:02:58,392 INFO  L276                IsEmpty]: Start isEmpty. Operand 437 states.
[2019-10-14 22:02:58,399 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2019-10-14 22:02:58,399 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:02:58,400 INFO  L380         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]
[2019-10-14 22:02:58,402 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:02:58,408 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:02:58,409 INFO  L82        PathProgramCache]: Analyzing trace with hash 1150521477, now seen corresponding path program 1 times
[2019-10-14 22:02:58,418 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:02:58,419 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343611405]
[2019-10-14 22:02:58,419 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:02:58,419 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:02:58,420 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:02:58,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:02:58,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:02:58,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:02:58,833 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343611405]
[2019-10-14 22:02:58,834 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:02:58,835 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 22:02:58,835 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674624096]
[2019-10-14 22:02:58,840 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:02:58,841 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:02:58,855 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:02:58,856 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 22:02:58,858 INFO  L87              Difference]: Start difference. First operand 437 states. Second operand 5 states.
[2019-10-14 22:03:05,586 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:03:05,587 INFO  L93              Difference]: Finished difference Result 1575 states and 2878 transitions.
[2019-10-14 22:03:05,587 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 22:03:05,589 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 23
[2019-10-14 22:03:05,589 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:03:05,622 INFO  L225             Difference]: With dead ends: 1575
[2019-10-14 22:03:05,622 INFO  L226             Difference]: Without dead ends: 1055
[2019-10-14 22:03:05,632 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-14 22:03:05,653 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1055 states.
[2019-10-14 22:03:05,760 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024.
[2019-10-14 22:03:05,763 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1024 states.
[2019-10-14 22:03:05,770 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions.
[2019-10-14 22:03:05,772 INFO  L78                 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 23
[2019-10-14 22:03:05,774 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:03:05,774 INFO  L462      AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions.
[2019-10-14 22:03:05,774 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:03:05,774 INFO  L276                IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions.
[2019-10-14 22:03:05,785 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2019-10-14 22:03:05,785 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:03:05,786 INFO  L380         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]
[2019-10-14 22:03:05,786 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:03:05,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:03:05,788 INFO  L82        PathProgramCache]: Analyzing trace with hash 1552013474, now seen corresponding path program 1 times
[2019-10-14 22:03:05,788 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:03:05,788 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391535870]
[2019-10-14 22:03:05,789 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:05,789 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:05,789 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:03:05,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:05,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:05,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:06,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:03:06,050 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391535870]
[2019-10-14 22:03:06,051 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826507435]
[2019-10-14 22:03:06,051 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:03:06,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:06,148 INFO  L256         TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:03:06,156 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:03:06,218 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:03:06,219 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:03:06,219 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-10-14 22:03:06,220 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152649883]
[2019-10-14 22:03:06,225 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 22:03:06,226 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:03:06,226 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 22:03:06,226 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-14 22:03:06,227 INFO  L87              Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states.
[2019-10-14 22:03:08,532 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:03:08,533 INFO  L93              Difference]: Finished difference Result 2976 states and 5156 transitions.
[2019-10-14 22:03:08,533 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 22:03:08,533 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 92
[2019-10-14 22:03:08,534 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:03:08,547 INFO  L225             Difference]: With dead ends: 2976
[2019-10-14 22:03:08,547 INFO  L226             Difference]: Without dead ends: 1958
[2019-10-14 22:03:08,552 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-14 22:03:08,555 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1958 states.
[2019-10-14 22:03:08,633 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955.
[2019-10-14 22:03:08,633 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1955 states.
[2019-10-14 22:03:08,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions.
[2019-10-14 22:03:08,644 INFO  L78                 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 92
[2019-10-14 22:03:08,645 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:03:08,646 INFO  L462      AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions.
[2019-10-14 22:03:08,646 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 22:03:08,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions.
[2019-10-14 22:03:08,655 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2019-10-14 22:03:08,656 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:03:08,656 INFO  L380         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]
[2019-10-14 22:03:08,868 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:03:08,869 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:03:08,869 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:03:08,869 INFO  L82        PathProgramCache]: Analyzing trace with hash 317241164, now seen corresponding path program 1 times
[2019-10-14 22:03:08,870 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:03:08,870 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157952114]
[2019-10-14 22:03:08,871 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:08,871 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:08,871 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:03:08,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:08,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:09,016 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:09,149 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:03:09,149 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157952114]
[2019-10-14 22:03:09,149 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:03:09,150 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-14 22:03:09,150 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586074789]
[2019-10-14 22:03:09,151 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-14 22:03:09,151 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:03:09,151 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-14 22:03:09,152 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-14 22:03:09,152 INFO  L87              Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states.
[2019-10-14 22:03:09,272 WARN  L191               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2019-10-14 22:03:15,648 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:03:15,648 INFO  L93              Difference]: Finished difference Result 5861 states and 8774 transitions.
[2019-10-14 22:03:15,649 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-14 22:03:15,649 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 109
[2019-10-14 22:03:15,650 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:03:15,671 INFO  L225             Difference]: With dead ends: 5861
[2019-10-14 22:03:15,672 INFO  L226             Difference]: Without dead ends: 3912
[2019-10-14 22:03:15,678 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182
[2019-10-14 22:03:15,683 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3912 states.
[2019-10-14 22:03:15,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934.
[2019-10-14 22:03:15,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2934 states.
[2019-10-14 22:03:15,781 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions.
[2019-10-14 22:03:15,781 INFO  L78                 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 109
[2019-10-14 22:03:15,782 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:03:15,782 INFO  L462      AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions.
[2019-10-14 22:03:15,782 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-14 22:03:15,782 INFO  L276                IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions.
[2019-10-14 22:03:15,787 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 298
[2019-10-14 22:03:15,787 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:03:15,787 INFO  L380         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:03:15,788 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:03:15,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:03:15,788 INFO  L82        PathProgramCache]: Analyzing trace with hash 993341937, now seen corresponding path program 1 times
[2019-10-14 22:03:15,788 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:03:15,789 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392982728]
[2019-10-14 22:03:15,789 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:15,789 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:15,789 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:03:15,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:15,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:16,025 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:16,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-14 22:03:16,417 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392982728]
[2019-10-14 22:03:16,417 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936618871]
[2019-10-14 22:03:16,417 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:03:16,518 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:16,519 INFO  L256         TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-10-14 22:03:16,528 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:03:16,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-14 22:03:16,654 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 22:03:16,654 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8
[2019-10-14 22:03:16,654 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794309201]
[2019-10-14 22:03:16,656 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-14 22:03:16,701 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:03:16,701 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-14 22:03:16,702 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-14 22:03:16,702 INFO  L87              Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 8 states.
[2019-10-14 22:03:23,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:03:23,024 INFO  L93              Difference]: Finished difference Result 9968 states and 14056 transitions.
[2019-10-14 22:03:23,028 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-14 22:03:23,028 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 297
[2019-10-14 22:03:23,029 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:03:23,064 INFO  L225             Difference]: With dead ends: 9968
[2019-10-14 22:03:23,064 INFO  L226             Difference]: Without dead ends: 7040
[2019-10-14 22:03:23,074 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182
[2019-10-14 22:03:23,081 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7040 states.
[2019-10-14 22:03:23,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 6406.
[2019-10-14 22:03:23,240 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6406 states.
[2019-10-14 22:03:23,264 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 8425 transitions.
[2019-10-14 22:03:23,265 INFO  L78                 Accepts]: Start accepts. Automaton has 6406 states and 8425 transitions. Word has length 297
[2019-10-14 22:03:23,268 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:03:23,268 INFO  L462      AbstractCegarLoop]: Abstraction has 6406 states and 8425 transitions.
[2019-10-14 22:03:23,268 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-14 22:03:23,268 INFO  L276                IsEmpty]: Start isEmpty. Operand 6406 states and 8425 transitions.
[2019-10-14 22:03:23,275 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 350
[2019-10-14 22:03:23,276 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:03:23,276 INFO  L380         BasicCegarLoop]: trace histogram [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, 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, 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]
[2019-10-14 22:03:23,481 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:03:23,481 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:03:23,482 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:03:23,482 INFO  L82        PathProgramCache]: Analyzing trace with hash 2040498893, now seen corresponding path program 1 times
[2019-10-14 22:03:23,482 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:03:23,482 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531476208]
[2019-10-14 22:03:23,483 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:23,483 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:23,483 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:03:23,576 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:23,671 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:23,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:23,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:24,017 INFO  L134       CoverageAnalysis]: Checked inductivity of 156 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked.
[2019-10-14 22:03:24,017 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531476208]
[2019-10-14 22:03:24,018 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:03:24,018 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-14 22:03:24,019 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559072421]
[2019-10-14 22:03:24,020 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-14 22:03:24,020 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:03:24,020 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-14 22:03:24,020 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-14 22:03:24,021 INFO  L87              Difference]: Start difference. First operand 6406 states and 8425 transitions. Second operand 6 states.
[2019-10-14 22:03:29,238 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:03:29,238 INFO  L93              Difference]: Finished difference Result 15941 states and 21728 transitions.
[2019-10-14 22:03:29,239 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 22:03:29,239 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 349
[2019-10-14 22:03:29,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:03:29,281 INFO  L225             Difference]: With dead ends: 15941
[2019-10-14 22:03:29,282 INFO  L226             Difference]: Without dead ends: 9541
[2019-10-14 22:03:29,299 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2019-10-14 22:03:29,310 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9541 states.
[2019-10-14 22:03:29,530 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8603.
[2019-10-14 22:03:29,531 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8603 states.
[2019-10-14 22:03:29,555 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 10794 transitions.
[2019-10-14 22:03:29,556 INFO  L78                 Accepts]: Start accepts. Automaton has 8603 states and 10794 transitions. Word has length 349
[2019-10-14 22:03:29,557 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:03:29,557 INFO  L462      AbstractCegarLoop]: Abstraction has 8603 states and 10794 transitions.
[2019-10-14 22:03:29,558 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-14 22:03:29,558 INFO  L276                IsEmpty]: Start isEmpty. Operand 8603 states and 10794 transitions.
[2019-10-14 22:03:29,569 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 397
[2019-10-14 22:03:29,569 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:03:29,570 INFO  L380         BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:03:29,571 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:03:29,575 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:03:29,576 INFO  L82        PathProgramCache]: Analyzing trace with hash 1962388647, now seen corresponding path program 1 times
[2019-10-14 22:03:29,576 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:03:29,576 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813849892]
[2019-10-14 22:03:29,577 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:29,577 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:03:29,577 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:03:29,677 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:29,774 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:29,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:29,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:30,327 INFO  L134       CoverageAnalysis]: Checked inductivity of 131 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 22:03:30,328 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813849892]
[2019-10-14 22:03:30,328 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429652589]
[2019-10-14 22:03:30,328 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:03:30,506 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:03:30,508 INFO  L256         TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:03:30,517 INFO  L279         TraceCheckSpWp]: Computing forward predicates...