/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c


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This is Ultimate 0.1.24-fb55353
[2019-11-06 19:05:21,910 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-06 19:05:21,996 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
[2019-11-06 19:05:22,009 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-06 19:05:22,009 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-06 19:05:22,011 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-06 19:05:22,011 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-06 19:05:22,011 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-06 19:05:22,011 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-06 19:05:22,011 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-06 19:05:22,012 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-06 19:05:22,012 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-06 19:05:22,012 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-06 19:05:22,012 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-06 19:05:22,012 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-06 19:05:22,012 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-06 19:05:22,013 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-06 19:05:22,013 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-06 19:05:22,013 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-06 19:05:22,013 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-06 19:05:22,013 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-06 19:05:22,014 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-06 19:05:22,014 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-06 19:05:22,014 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-06 19:05:22,014 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-06 19:05:22,014 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-06 19:05:22,015 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-06 19:05:22,015 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-06 19:05:22,015 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-06 19:05:22,015 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-06 19:05:22,015 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-06 19:05:22,016 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-06 19:05:22,291 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-06 19:05:22,308 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-06 19:05:22,310 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-06 19:05:22,311 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-06 19:05:22,312 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-06 19:05:22,312 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c
[2019-11-06 19:05:22,373 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2962331f/faa6bdb549884d4b82099b184240d898/FLAGc5ecca088
[2019-11-06 19:05:22,900 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-06 19:05:22,901 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c
[2019-11-06 19:05:22,928 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2962331f/faa6bdb549884d4b82099b184240d898/FLAGc5ecca088
[2019-11-06 19:05:23,204 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2962331f/faa6bdb549884d4b82099b184240d898
[2019-11-06 19:05:23,215 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-06 19:05:23,217 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-06 19:05:23,218 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-06 19:05:23,218 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-06 19:05:23,221 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-06 19:05:23,223 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:23,226 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23, skipping insertion in model container
[2019-11-06 19:05:23,226 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:23,234 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-06 19:05:23,291 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-06 19:05:23,788 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 19:05:23,798 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-06 19:05:23,904 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 19:05:23,926 INFO  L192         MainTranslator]: Completed translation
[2019-11-06 19:05:23,927 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23 WrapperNode
[2019-11-06 19:05:23,927 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-06 19:05:23,930 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-06 19:05:23,930 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-06 19:05:23,931 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-06 19:05:23,957 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:23,957 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:23,994 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:23,995 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:24,048 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:24,066 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:24,082 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ...
[2019-11-06 19:05:24,096 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-06 19:05:24,096 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-06 19:05:24,097 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-06 19:05:24,097 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-06 19:05:24,098 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (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
[2019-11-06 19:05:24,163 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-06 19:05:24,163 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-06 19:05:24,163 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-06 19:05:24,164 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-06 19:05:24,164 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-06 19:05:24,164 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-06 19:05:24,164 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-06 19:05:24,164 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-06 19:05:24,165 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-06 19:05:24,165 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-06 19:05:24,165 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-06 19:05:25,497 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-06 19:05:25,498 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-06 19:05:25,500 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:05:25 BoogieIcfgContainer
[2019-11-06 19:05:25,501 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-06 19:05:25,503 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-06 19:05:25,505 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-06 19:05:25,508 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-06 19:05:25,509 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:05:23" (1/3) ...
[2019-11-06 19:05:25,510 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af0f719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:05:25, skipping insertion in model container
[2019-11-06 19:05:25,511 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (2/3) ...
[2019-11-06 19:05:25,511 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af0f719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:05:25, skipping insertion in model container
[2019-11-06 19:05:25,511 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:05:25" (3/3) ...
[2019-11-06 19:05:25,514 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem10_label24.c
[2019-11-06 19:05:25,523 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-06 19:05:25,531 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-06 19:05:25,545 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-06 19:05:25,585 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-06 19:05:25,586 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-06 19:05:25,586 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-06 19:05:25,586 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-06 19:05:25,586 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-06 19:05:25,587 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-06 19:05:25,587 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-06 19:05:25,587 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-06 19:05:25,614 INFO  L276                IsEmpty]: Start isEmpty. Operand 215 states.
[2019-11-06 19:05:25,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2019-11-06 19:05:25,622 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:25,623 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:05:25,625 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:25,629 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:25,630 INFO  L82        PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times
[2019-11-06 19:05:25,636 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:25,637 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184756931]
[2019-11-06 19:05:25,637 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:25,759 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:25,906 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:25,935 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:05:25,936 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184756931]
[2019-11-06 19:05:25,937 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:05:25,937 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-06 19:05:25,940 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655531634]
[2019-11-06 19:05:25,947 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-06 19:05:25,948 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:25,966 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-06 19:05:25,967 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-06 19:05:25,970 INFO  L87              Difference]: Start difference. First operand 215 states. Second operand 5 states.
[2019-11-06 19:05:27,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:27,982 INFO  L93              Difference]: Finished difference Result 730 states and 1300 transitions.
[2019-11-06 19:05:27,983 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 19:05:27,984 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 20
[2019-11-06 19:05:27,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:28,002 INFO  L225             Difference]: With dead ends: 730
[2019-11-06 19:05:28,002 INFO  L226             Difference]: Without dead ends: 447
[2019-11-06 19:05:28,010 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-11-06 19:05:28,032 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 447 states.
[2019-11-06 19:05:28,092 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443.
[2019-11-06 19:05:28,093 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 443 states.
[2019-11-06 19:05:28,096 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions.
[2019-11-06 19:05:28,098 INFO  L78                 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 20
[2019-11-06 19:05:28,099 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:28,099 INFO  L462      AbstractCegarLoop]: Abstraction has 443 states and 595 transitions.
[2019-11-06 19:05:28,099 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-06 19:05:28,099 INFO  L276                IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions.
[2019-11-06 19:05:28,104 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 100
[2019-11-06 19:05:28,105 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:28,105 INFO  L410         BasicCegarLoop]: trace histogram [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]
[2019-11-06 19:05:28,105 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:28,106 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:28,106 INFO  L82        PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times
[2019-11-06 19:05:28,106 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:28,106 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841963802]
[2019-11-06 19:05:28,107 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:28,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:28,333 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:28,373 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:28,458 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:05:28,458 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841963802]
[2019-11-06 19:05:28,459 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139677981]
[2019-11-06 19:05:28,459 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
[2019-11-06 19:05:28,534 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:28,537 INFO  L256         TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:05:28,546 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:05:28,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:05:28,602 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:05:28,602 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-11-06 19:05:28,603 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583579289]
[2019-11-06 19:05:28,605 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 19:05:28,605 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:28,605 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 19:05:28,606 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-11-06 19:05:28,606 INFO  L87              Difference]: Start difference. First operand 443 states and 595 transitions. Second operand 3 states.
[2019-11-06 19:05:29,231 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:29,232 INFO  L93              Difference]: Finished difference Result 880 states and 1198 transitions.
[2019-11-06 19:05:29,232 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 19:05:29,233 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 99
[2019-11-06 19:05:29,234 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:29,240 INFO  L225             Difference]: With dead ends: 880
[2019-11-06 19:05:29,241 INFO  L226             Difference]: Without dead ends: 878
[2019-11-06 19:05:29,243 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-11-06 19:05:29,244 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 878 states.
[2019-11-06 19:05:29,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 735.
[2019-11-06 19:05:29,306 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 735 states.
[2019-11-06 19:05:29,311 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1029 transitions.
[2019-11-06 19:05:29,311 INFO  L78                 Accepts]: Start accepts. Automaton has 735 states and 1029 transitions. Word has length 99
[2019-11-06 19:05:29,312 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:29,312 INFO  L462      AbstractCegarLoop]: Abstraction has 735 states and 1029 transitions.
[2019-11-06 19:05:29,312 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 19:05:29,313 INFO  L276                IsEmpty]: Start isEmpty. Operand 735 states and 1029 transitions.
[2019-11-06 19:05:29,327 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2019-11-06 19:05:29,327 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:29,328 INFO  L410         BasicCegarLoop]: trace histogram [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]
[2019-11-06 19:05:29,528 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:29,529 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:29,530 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:29,530 INFO  L82        PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times
[2019-11-06 19:05:29,531 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:29,531 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123693078]
[2019-11-06 19:05:29,532 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:29,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:29,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:29,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:29,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:05:29,904 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123693078]
[2019-11-06 19:05:29,904 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:05:29,904 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-11-06 19:05:29,904 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642449269]
[2019-11-06 19:05:29,905 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-11-06 19:05:29,905 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:29,906 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-11-06 19:05:29,906 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-11-06 19:05:29,906 INFO  L87              Difference]: Start difference. First operand 735 states and 1029 transitions. Second operand 9 states.
[2019-11-06 19:05:31,363 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:31,363 INFO  L93              Difference]: Finished difference Result 1790 states and 2576 transitions.
[2019-11-06 19:05:31,367 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-11-06 19:05:31,367 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 142
[2019-11-06 19:05:31,368 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:31,374 INFO  L225             Difference]: With dead ends: 1790
[2019-11-06 19:05:31,375 INFO  L226             Difference]: Without dead ends: 1061
[2019-11-06 19:05:31,377 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182
[2019-11-06 19:05:31,379 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1061 states.
[2019-11-06 19:05:31,412 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1035.
[2019-11-06 19:05:31,413 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1035 states.
[2019-11-06 19:05:31,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1359 transitions.
[2019-11-06 19:05:31,418 INFO  L78                 Accepts]: Start accepts. Automaton has 1035 states and 1359 transitions. Word has length 142
[2019-11-06 19:05:31,419 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:31,419 INFO  L462      AbstractCegarLoop]: Abstraction has 1035 states and 1359 transitions.
[2019-11-06 19:05:31,419 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-11-06 19:05:31,419 INFO  L276                IsEmpty]: Start isEmpty. Operand 1035 states and 1359 transitions.
[2019-11-06 19:05:31,421 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 173
[2019-11-06 19:05:31,421 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:31,422 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:05:31,422 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:31,422 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:31,422 INFO  L82        PathProgramCache]: Analyzing trace with hash -1389117779, now seen corresponding path program 1 times
[2019-11-06 19:05:31,423 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:31,423 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088499256]
[2019-11-06 19:05:31,423 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:31,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:31,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:31,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:31,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:31,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 96 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:05:31,777 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088499256]
[2019-11-06 19:05:31,778 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293471219]
[2019-11-06 19:05:31,778 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
[2019-11-06 19:05:31,858 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:31,860 INFO  L256         TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:05:31,866 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:05:31,932 INFO  L134       CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:05:31,933 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:05:31,933 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-11-06 19:05:31,934 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536898950]
[2019-11-06 19:05:31,936 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-11-06 19:05:31,936 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:31,936 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-11-06 19:05:31,937 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-11-06 19:05:31,937 INFO  L87              Difference]: Start difference. First operand 1035 states and 1359 transitions. Second operand 11 states.
[2019-11-06 19:05:34,885 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:34,886 INFO  L93              Difference]: Finished difference Result 2601 states and 3691 transitions.
[2019-11-06 19:05:34,886 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2019-11-06 19:05:34,887 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 172
[2019-11-06 19:05:34,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:34,899 INFO  L225             Difference]: With dead ends: 2601
[2019-11-06 19:05:34,899 INFO  L226             Difference]: Without dead ends: 1572
[2019-11-06 19:05:34,902 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506
[2019-11-06 19:05:34,904 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1572 states.
[2019-11-06 19:05:34,953 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1240.
[2019-11-06 19:05:34,953 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1240 states.
[2019-11-06 19:05:34,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1602 transitions.
[2019-11-06 19:05:34,960 INFO  L78                 Accepts]: Start accepts. Automaton has 1240 states and 1602 transitions. Word has length 172
[2019-11-06 19:05:34,960 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:34,960 INFO  L462      AbstractCegarLoop]: Abstraction has 1240 states and 1602 transitions.
[2019-11-06 19:05:34,961 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-11-06 19:05:34,961 INFO  L276                IsEmpty]: Start isEmpty. Operand 1240 states and 1602 transitions.
[2019-11-06 19:05:34,963 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 180
[2019-11-06 19:05:34,963 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:34,964 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:05:35,167 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:35,168 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:35,168 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:35,169 INFO  L82        PathProgramCache]: Analyzing trace with hash 647504076, now seen corresponding path program 1 times
[2019-11-06 19:05:35,169 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:35,169 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355951939]
[2019-11-06 19:05:35,170 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:35,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:35,249 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:35,268 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:35,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:35,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:05:35,410 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355951939]
[2019-11-06 19:05:35,410 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616230442]
[2019-11-06 19:05:35,410 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
[2019-11-06 19:05:35,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:35,494 INFO  L256         TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:05:35,510 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:05:35,622 INFO  L134       CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:05:35,623 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:05:35,623 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-11-06 19:05:35,624 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793440506]
[2019-11-06 19:05:35,625 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-11-06 19:05:35,625 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:35,626 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-11-06 19:05:35,626 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-11-06 19:05:35,626 INFO  L87              Difference]: Start difference. First operand 1240 states and 1602 transitions. Second operand 11 states.
[2019-11-06 19:05:37,785 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:37,785 INFO  L93              Difference]: Finished difference Result 2466 states and 3171 transitions.
[2019-11-06 19:05:37,785 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2019-11-06 19:05:37,786 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 179
[2019-11-06 19:05:37,786 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:37,792 INFO  L225             Difference]: With dead ends: 2466
[2019-11-06 19:05:37,792 INFO  L226             Difference]: Without dead ends: 1232
[2019-11-06 19:05:37,797 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420
[2019-11-06 19:05:37,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1232 states.
[2019-11-06 19:05:37,826 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1208.
[2019-11-06 19:05:37,827 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1208 states.
[2019-11-06 19:05:37,832 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1475 transitions.
[2019-11-06 19:05:37,832 INFO  L78                 Accepts]: Start accepts. Automaton has 1208 states and 1475 transitions. Word has length 179
[2019-11-06 19:05:37,832 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:37,833 INFO  L462      AbstractCegarLoop]: Abstraction has 1208 states and 1475 transitions.
[2019-11-06 19:05:37,833 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-11-06 19:05:37,833 INFO  L276                IsEmpty]: Start isEmpty. Operand 1208 states and 1475 transitions.
[2019-11-06 19:05:37,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 190
[2019-11-06 19:05:37,836 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:37,836 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:05:38,039 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:38,040 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:38,040 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:38,040 INFO  L82        PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times
[2019-11-06 19:05:38,041 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:38,041 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973451194]
[2019-11-06 19:05:38,042 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:38,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:38,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:38,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:38,259 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:38,399 INFO  L134       CoverageAnalysis]: Checked inductivity of 108 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:05:38,399 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973451194]
[2019-11-06 19:05:38,399 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621254375]
[2019-11-06 19:05:38,400 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:38,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:38,500 INFO  L256         TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-11-06 19:05:38,504 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:05:38,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 108 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-06 19:05:38,586 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:05:38,586 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10
[2019-11-06 19:05:38,586 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811823911]
[2019-11-06 19:05:38,587 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-06 19:05:38,587 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:38,587 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-06 19:05:38,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2019-11-06 19:05:38,588 INFO  L87              Difference]: Start difference. First operand 1208 states and 1475 transitions. Second operand 5 states.
[2019-11-06 19:05:39,648 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:39,649 INFO  L93              Difference]: Finished difference Result 2583 states and 3144 transitions.
[2019-11-06 19:05:39,651 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 19:05:39,652 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 189
[2019-11-06 19:05:39,652 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:39,658 INFO  L225             Difference]: With dead ends: 2583
[2019-11-06 19:05:39,658 INFO  L226             Difference]: Without dead ends: 1381
[2019-11-06 19:05:39,661 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132
[2019-11-06 19:05:39,663 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1381 states.
[2019-11-06 19:05:39,689 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1355.
[2019-11-06 19:05:39,689 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1355 states.
[2019-11-06 19:05:39,693 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1633 transitions.
[2019-11-06 19:05:39,694 INFO  L78                 Accepts]: Start accepts. Automaton has 1355 states and 1633 transitions. Word has length 189
[2019-11-06 19:05:39,694 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:39,694 INFO  L462      AbstractCegarLoop]: Abstraction has 1355 states and 1633 transitions.
[2019-11-06 19:05:39,694 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-06 19:05:39,695 INFO  L276                IsEmpty]: Start isEmpty. Operand 1355 states and 1633 transitions.
[2019-11-06 19:05:39,699 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 269
[2019-11-06 19:05:39,699 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:39,700 INFO  L410         BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:05:39,903 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:39,903 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:39,907 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:39,907 INFO  L82        PathProgramCache]: Analyzing trace with hash -1807357958, now seen corresponding path program 1 times
[2019-11-06 19:05:39,907 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:39,907 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902389637]
[2019-11-06 19:05:39,908 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:39,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:40,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:40,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:40,074 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:40,150 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:40,226 INFO  L134       CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 84 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked.
[2019-11-06 19:05:40,227 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902389637]
[2019-11-06 19:05:40,228 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823339443]
[2019-11-06 19:05:40,228 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:40,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:40,328 INFO  L256         TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:05:40,332 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:05:40,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 279 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-06 19:05:40,447 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:05:40,447 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13
[2019-11-06 19:05:40,448 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863121958]
[2019-11-06 19:05:40,448 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-11-06 19:05:40,449 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:05:40,449 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-11-06 19:05:40,449 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156
[2019-11-06 19:05:40,449 INFO  L87              Difference]: Start difference. First operand 1355 states and 1633 transitions. Second operand 13 states.
[2019-11-06 19:05:44,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:05:44,019 INFO  L93              Difference]: Finished difference Result 4160 states and 5073 transitions.
[2019-11-06 19:05:44,019 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2019-11-06 19:05:44,019 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 268
[2019-11-06 19:05:44,020 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:05:44,027 INFO  L225             Difference]: With dead ends: 4160
[2019-11-06 19:05:44,027 INFO  L226             Difference]: Without dead ends: 1780
[2019-11-06 19:05:44,033 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650
[2019-11-06 19:05:44,035 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1780 states.
[2019-11-06 19:05:44,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1343.
[2019-11-06 19:05:44,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1343 states.
[2019-11-06 19:05:44,068 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1491 transitions.
[2019-11-06 19:05:44,068 INFO  L78                 Accepts]: Start accepts. Automaton has 1343 states and 1491 transitions. Word has length 268
[2019-11-06 19:05:44,069 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:05:44,069 INFO  L462      AbstractCegarLoop]: Abstraction has 1343 states and 1491 transitions.
[2019-11-06 19:05:44,069 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-11-06 19:05:44,069 INFO  L276                IsEmpty]: Start isEmpty. Operand 1343 states and 1491 transitions.
[2019-11-06 19:05:44,074 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 305
[2019-11-06 19:05:44,075 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:05:44,075 INFO  L410         BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:05:44,278 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:44,279 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:05:44,279 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:05:44,279 INFO  L82        PathProgramCache]: Analyzing trace with hash -1479931902, now seen corresponding path program 1 times
[2019-11-06 19:05:44,280 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:05:44,280 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199809710]
[2019-11-06 19:05:44,280 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:05:44,335 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:44,425 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:44,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:44,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:44,781 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:45,110 INFO  L134       CoverageAnalysis]: Checked inductivity of 290 backedges. 124 proven. 162 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-11-06 19:05:45,111 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199809710]
[2019-11-06 19:05:45,111 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522763748]
[2019-11-06 19:05:45,111 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:05:45,255 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:05:45,258 INFO  L256         TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 23 conjunts are in the unsatisfiable core
[2019-11-06 19:05:45,263 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:05:45,315 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,316 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,317 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,318 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,325 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,326 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,331 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:05:45,332 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:06:04,119 WARN  L191               SmtUtils]: Spent 18.69 s on a formula simplification. DAG size of input: 54 DAG size of output: 39
[2019-11-06 19:06:04,173 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-11-06 19:06:04,308 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 6 terms
[2019-11-06 19:06:04,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 290 backedges. 272 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-06 19:06:04,599 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:06:04,599 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23
[2019-11-06 19:06:04,599 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507398562]
[2019-11-06 19:06:04,600 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 23 states
[2019-11-06 19:06:04,600 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:04,601 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2019-11-06 19:06:04,601 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506
[2019-11-06 19:06:04,601 INFO  L87              Difference]: Start difference. First operand 1343 states and 1491 transitions. Second operand 23 states.