/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/Problem11_label23.c


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This is Ultimate 0.1.24-fb55353
[2019-11-06 19:08:36,789 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-06 19:08:36,836 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 19:08:36,849 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-06 19:08:36,849 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-06 19:08:36,850 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-06 19:08:36,850 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-06 19:08:36,851 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-06 19:08:36,851 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-06 19:08:36,851 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-06 19:08:36,851 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-06 19:08:36,852 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-06 19:08:36,852 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-06 19:08:36,852 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-06 19:08:36,852 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-06 19:08:36,852 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-06 19:08:36,852 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-06 19:08:36,853 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-06 19:08:36,853 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-06 19:08:36,853 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-06 19:08:36,853 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-06 19:08:36,854 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-06 19:08:36,854 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-06 19:08:36,854 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-06 19:08:36,854 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-06 19:08:36,854 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-06 19:08:36,855 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-06 19:08:36,855 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-06 19:08:36,855 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-06 19:08:36,855 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-06 19:08:36,855 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-06 19:08:36,856 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-06 19:08:37,191 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-06 19:08:37,204 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-06 19:08:37,208 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-06 19:08:37,209 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-06 19:08:37,210 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-06 19:08:37,211 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c
[2019-11-06 19:08:37,275 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fe195367/d5796b85f4244705941889b3883ed59b/FLAG6478db9e0
[2019-11-06 19:08:37,833 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-06 19:08:37,834 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label23.c
[2019-11-06 19:08:37,849 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fe195367/d5796b85f4244705941889b3883ed59b/FLAG6478db9e0
[2019-11-06 19:08:38,107 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fe195367/d5796b85f4244705941889b3883ed59b
[2019-11-06 19:08:38,117 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-06 19:08:38,119 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-06 19:08:38,120 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-06 19:08:38,120 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-06 19:08:38,124 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-06 19:08:38,125 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:38" (1/1) ...
[2019-11-06 19:08:38,127 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e5aa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:38, skipping insertion in model container
[2019-11-06 19:08:38,128 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:38" (1/1) ...
[2019-11-06 19:08:38,135 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-06 19:08:38,203 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-06 19:08:38,925 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 19:08:38,935 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-06 19:08:39,132 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 19:08:39,150 INFO  L192         MainTranslator]: Completed translation
[2019-11-06 19:08:39,150 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39 WrapperNode
[2019-11-06 19:08:39,151 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-06 19:08:39,151 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-06 19:08:39,152 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-06 19:08:39,152 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-06 19:08:39,167 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,168 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,213 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,213 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,287 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,314 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,328 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (1/1) ...
[2019-11-06 19:08:39,339 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-06 19:08:39,339 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-06 19:08:39,340 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-06 19:08:39,340 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-06 19:08:39,341 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (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 19:08:39,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-06 19:08:39,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-06 19:08:39,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-06 19:08:39,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-06 19:08:39,412 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-06 19:08:39,413 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-06 19:08:39,413 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-06 19:08:39,413 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-06 19:08:39,414 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-06 19:08:39,414 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-06 19:08:39,414 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-06 19:08:41,406 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-06 19:08:41,407 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-06 19:08:41,408 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:41 BoogieIcfgContainer
[2019-11-06 19:08:41,409 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-06 19:08:41,410 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-06 19:08:41,410 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-06 19:08:41,414 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-06 19:08:41,414 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:38" (1/3) ...
[2019-11-06 19:08:41,415 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9d5c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:41, skipping insertion in model container
[2019-11-06 19:08:41,416 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:39" (2/3) ...
[2019-11-06 19:08:41,416 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9d5c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:41, skipping insertion in model container
[2019-11-06 19:08:41,416 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:41" (3/3) ...
[2019-11-06 19:08:41,418 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label23.c
[2019-11-06 19:08:41,430 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-06 19:08:41,440 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-06 19:08:41,454 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-06 19:08:41,484 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-06 19:08:41,484 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-06 19:08:41,484 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-06 19:08:41,485 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-06 19:08:41,485 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-06 19:08:41,485 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-06 19:08:41,485 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-06 19:08:41,485 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-06 19:08:41,511 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-11-06 19:08:41,521 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2019-11-06 19:08:41,521 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:08:41,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:41,524 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:08:41,531 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:08:41,531 INFO  L82        PathProgramCache]: Analyzing trace with hash -1552063366, now seen corresponding path program 1 times
[2019-11-06 19:08:41,541 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:08:41,542 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492191311]
[2019-11-06 19:08:41,542 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:08:41,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:42,105 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:42,163 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 19:08:42,164 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492191311]
[2019-11-06 19:08:42,166 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:08:42,166 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-06 19:08:42,169 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786791232]
[2019-11-06 19:08:42,175 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-06 19:08:42,175 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:08:42,194 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-06 19:08:42,195 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-06 19:08:42,198 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-11-06 19:08:45,364 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:08:45,365 INFO  L93              Difference]: Finished difference Result 998 states and 1793 transitions.
[2019-11-06 19:08:45,365 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 19:08:45,367 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 71
[2019-11-06 19:08:45,368 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:08:45,390 INFO  L225             Difference]: With dead ends: 998
[2019-11-06 19:08:45,390 INFO  L226             Difference]: Without dead ends: 638
[2019-11-06 19:08:45,401 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 19:08:45,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 638 states.
[2019-11-06 19:08:45,496 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621.
[2019-11-06 19:08:45,498 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 621 states.
[2019-11-06 19:08:45,502 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions.
[2019-11-06 19:08:45,504 INFO  L78                 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 71
[2019-11-06 19:08:45,505 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:08:45,505 INFO  L462      AbstractCegarLoop]: Abstraction has 621 states and 950 transitions.
[2019-11-06 19:08:45,505 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-06 19:08:45,505 INFO  L276                IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions.
[2019-11-06 19:08:45,513 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 142
[2019-11-06 19:08:45,513 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:08:45,514 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:08:45,514 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:08:45,514 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:08:45,514 INFO  L82        PathProgramCache]: Analyzing trace with hash 1937579030, now seen corresponding path program 1 times
[2019-11-06 19:08:45,515 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:08:45,515 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040227130]
[2019-11-06 19:08:45,515 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:08:45,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:45,680 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:45,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:45,912 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:08:45,913 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040227130]
[2019-11-06 19:08:45,913 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:08:45,913 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-11-06 19:08:45,914 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526956461]
[2019-11-06 19:08:45,916 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-11-06 19:08:45,916 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:08:45,917 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-11-06 19:08:45,917 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-11-06 19:08:45,917 INFO  L87              Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states.
[2019-11-06 19:08:49,794 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:08:49,794 INFO  L93              Difference]: Finished difference Result 2487 states and 4246 transitions.
[2019-11-06 19:08:49,795 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-11-06 19:08:49,796 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 141
[2019-11-06 19:08:49,796 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:08:49,814 INFO  L225             Difference]: With dead ends: 2487
[2019-11-06 19:08:49,814 INFO  L226             Difference]: Without dead ends: 1872
[2019-11-06 19:08:49,818 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182
[2019-11-06 19:08:49,821 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1872 states.
[2019-11-06 19:08:49,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816.
[2019-11-06 19:08:49,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1816 states.
[2019-11-06 19:08:49,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2597 transitions.
[2019-11-06 19:08:49,938 INFO  L78                 Accepts]: Start accepts. Automaton has 1816 states and 2597 transitions. Word has length 141
[2019-11-06 19:08:49,940 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:08:49,940 INFO  L462      AbstractCegarLoop]: Abstraction has 1816 states and 2597 transitions.
[2019-11-06 19:08:49,940 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-11-06 19:08:49,941 INFO  L276                IsEmpty]: Start isEmpty. Operand 1816 states and 2597 transitions.
[2019-11-06 19:08:49,955 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 152
[2019-11-06 19:08:49,956 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:08:49,956 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-06 19:08:49,956 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:08:49,957 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:08:49,957 INFO  L82        PathProgramCache]: Analyzing trace with hash 1983928202, now seen corresponding path program 1 times
[2019-11-06 19:08:49,957 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:08:49,957 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683471044]
[2019-11-06 19:08:49,960 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:08:50,004 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:50,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:50,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:50,236 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:08:50,237 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683471044]
[2019-11-06 19:08:50,237 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:08:50,237 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-11-06 19:08:50,238 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256163631]
[2019-11-06 19:08:50,238 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-11-06 19:08:50,239 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:08:50,239 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-11-06 19:08:50,239 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-11-06 19:08:50,240 INFO  L87              Difference]: Start difference. First operand 1816 states and 2597 transitions. Second operand 8 states.
[2019-11-06 19:08:53,241 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:08:53,241 INFO  L93              Difference]: Finished difference Result 5268 states and 7936 transitions.
[2019-11-06 19:08:53,242 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-11-06 19:08:53,242 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 151
[2019-11-06 19:08:53,243 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:08:53,271 INFO  L225             Difference]: With dead ends: 5268
[2019-11-06 19:08:53,271 INFO  L226             Difference]: Without dead ends: 3458
[2019-11-06 19:08:53,280 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-11-06 19:08:53,285 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3458 states.
[2019-11-06 19:08:53,400 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3233.
[2019-11-06 19:08:53,401 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3233 states.
[2019-11-06 19:08:53,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions.
[2019-11-06 19:08:53,418 INFO  L78                 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 151
[2019-11-06 19:08:53,420 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:08:53,420 INFO  L462      AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions.
[2019-11-06 19:08:53,420 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-11-06 19:08:53,421 INFO  L276                IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions.
[2019-11-06 19:08:53,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 215
[2019-11-06 19:08:53,429 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:08:53,429 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:08:53,429 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:08:53,430 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:08:53,430 INFO  L82        PathProgramCache]: Analyzing trace with hash -1698562555, now seen corresponding path program 1 times
[2019-11-06 19:08:53,430 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:08:53,430 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928204902]
[2019-11-06 19:08:53,430 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:08:53,489 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:53,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:53,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:53,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:53,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:08:53,832 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928204902]
[2019-11-06 19:08:53,832 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460252385]
[2019-11-06 19:08:53,833 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 19:08:53,964 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:53,967 INFO  L256         TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-11-06 19:08:53,995 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:08:54,091 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:08:54,092 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:08:54,092 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8
[2019-11-06 19:08:54,093 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787369947]
[2019-11-06 19:08:54,093 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-11-06 19:08:54,094 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:08:54,094 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-11-06 19:08:54,095 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-11-06 19:08:54,095 INFO  L87              Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states.
[2019-11-06 19:08:56,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:08:56,418 INFO  L93              Difference]: Finished difference Result 6540 states and 9942 transitions.
[2019-11-06 19:08:56,419 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-11-06 19:08:56,419 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 214
[2019-11-06 19:08:56,421 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:08:56,442 INFO  L225             Difference]: With dead ends: 6540
[2019-11-06 19:08:56,442 INFO  L226             Difference]: Without dead ends: 3313
[2019-11-06 19:08:56,455 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-11-06 19:08:56,459 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3313 states.
[2019-11-06 19:08:56,552 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993.
[2019-11-06 19:08:56,553 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2993 states.
[2019-11-06 19:08:56,561 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3905 transitions.
[2019-11-06 19:08:56,562 INFO  L78                 Accepts]: Start accepts. Automaton has 2993 states and 3905 transitions. Word has length 214
[2019-11-06 19:08:56,562 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:08:56,562 INFO  L462      AbstractCegarLoop]: Abstraction has 2993 states and 3905 transitions.
[2019-11-06 19:08:56,562 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-11-06 19:08:56,563 INFO  L276                IsEmpty]: Start isEmpty. Operand 2993 states and 3905 transitions.
[2019-11-06 19:08:56,567 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 225
[2019-11-06 19:08:56,568 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:08:56,568 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:08:56,773 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:08:56,774 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:08:56,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:08:56,774 INFO  L82        PathProgramCache]: Analyzing trace with hash 1529010873, now seen corresponding path program 1 times
[2019-11-06 19:08:56,775 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:08:56,775 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721348954]
[2019-11-06 19:08:56,775 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:08:56,840 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:56,927 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:56,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:56,992 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:57,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 201 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-11-06 19:08:57,051 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721348954]
[2019-11-06 19:08:57,051 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023462593]
[2019-11-06 19:08:57,051 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 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 19:08:57,162 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:57,163 INFO  L256         TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:08:57,172 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:08:57,283 INFO  L134       CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-11-06 19:08:57,283 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:08:57,284 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5
[2019-11-06 19:08:57,284 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833180126]
[2019-11-06 19:08:57,285 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 19:08:57,285 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:08:57,285 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 19:08:57,285 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-06 19:08:57,286 INFO  L87              Difference]: Start difference. First operand 2993 states and 3905 transitions. Second operand 3 states.
[2019-11-06 19:08:58,334 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:08:58,335 INFO  L93              Difference]: Finished difference Result 7518 states and 10149 transitions.
[2019-11-06 19:08:58,335 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 19:08:58,336 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 224
[2019-11-06 19:08:58,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:08:58,361 INFO  L225             Difference]: With dead ends: 7518
[2019-11-06 19:08:58,361 INFO  L226             Difference]: Without dead ends: 4531
[2019-11-06 19:08:58,369 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-06 19:08:58,374 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4531 states.
[2019-11-06 19:08:58,491 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 4139.
[2019-11-06 19:08:58,492 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4139 states.
[2019-11-06 19:08:58,502 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5492 transitions.
[2019-11-06 19:08:58,503 INFO  L78                 Accepts]: Start accepts. Automaton has 4139 states and 5492 transitions. Word has length 224
[2019-11-06 19:08:58,503 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:08:58,504 INFO  L462      AbstractCegarLoop]: Abstraction has 4139 states and 5492 transitions.
[2019-11-06 19:08:58,504 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 19:08:58,504 INFO  L276                IsEmpty]: Start isEmpty. Operand 4139 states and 5492 transitions.
[2019-11-06 19:08:58,516 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 276
[2019-11-06 19:08:58,516 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:08:58,517 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:58,730 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:08:58,730 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:08:58,730 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:08:58,731 INFO  L82        PathProgramCache]: Analyzing trace with hash 2030409120, now seen corresponding path program 1 times
[2019-11-06 19:08:58,731 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:08:58,731 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710614188]
[2019-11-06 19:08:58,731 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:08:58,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:58,926 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:58,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:59,005 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:59,284 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 133 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:08:59,285 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710614188]
[2019-11-06 19:08:59,285 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138557255]
[2019-11-06 19:08:59,285 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 19:08:59,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:08:59,399 INFO  L256         TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-11-06 19:08:59,405 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:08:59,450 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-11-06 19:08:59,527 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked.
[2019-11-06 19:08:59,528 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:08:59,528 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12
[2019-11-06 19:08:59,528 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929220133]
[2019-11-06 19:08:59,529 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-06 19:08:59,529 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:08:59,530 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-06 19:08:59,530 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2019-11-06 19:08:59,530 INFO  L87              Difference]: Start difference. First operand 4139 states and 5492 transitions. Second operand 5 states.
[2019-11-06 19:09:01,034 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:09:01,035 INFO  L93              Difference]: Finished difference Result 8337 states and 11181 transitions.
[2019-11-06 19:09:01,035 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 19:09:01,035 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 275
[2019-11-06 19:09:01,035 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:09:01,056 INFO  L225             Difference]: With dead ends: 8337
[2019-11-06 19:09:01,056 INFO  L226             Difference]: Without dead ends: 4204
[2019-11-06 19:09:01,067 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2019-11-06 19:09:01,071 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4204 states.
[2019-11-06 19:09:01,170 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 4155.
[2019-11-06 19:09:01,170 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4155 states.
[2019-11-06 19:09:01,177 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5503 transitions.
[2019-11-06 19:09:01,178 INFO  L78                 Accepts]: Start accepts. Automaton has 4155 states and 5503 transitions. Word has length 275
[2019-11-06 19:09:01,178 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:09:01,178 INFO  L462      AbstractCegarLoop]: Abstraction has 4155 states and 5503 transitions.
[2019-11-06 19:09:01,178 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-06 19:09:01,178 INFO  L276                IsEmpty]: Start isEmpty. Operand 4155 states and 5503 transitions.
[2019-11-06 19:09:01,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 310
[2019-11-06 19:09:01,187 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:09:01,187 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:01,400 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:09:01,400 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:09:01,400 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:09:01,401 INFO  L82        PathProgramCache]: Analyzing trace with hash 624431733, now seen corresponding path program 1 times
[2019-11-06 19:09:01,401 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:09:01,401 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925587715]
[2019-11-06 19:09:01,401 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:09:01,462 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:01,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:01,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:01,617 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:01,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 235 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-06 19:09:01,704 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925587715]
[2019-11-06 19:09:01,704 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306027162]
[2019-11-06 19:09:01,704 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 19:09:01,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:01,841 INFO  L256         TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-11-06 19:09:01,848 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:09:02,041 INFO  L134       CoverageAnalysis]: Checked inductivity of 235 backedges. 168 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-11-06 19:09:02,041 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:09:02,041 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-11-06 19:09:02,042 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012026689]
[2019-11-06 19:09:02,043 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-11-06 19:09:02,043 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:09:02,043 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-11-06 19:09:02,044 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-11-06 19:09:02,044 INFO  L87              Difference]: Start difference. First operand 4155 states and 5503 transitions. Second operand 7 states.
[2019-11-06 19:09:03,746 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:09:03,746 INFO  L93              Difference]: Finished difference Result 8394 states and 11573 transitions.
[2019-11-06 19:09:03,747 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 19:09:03,747 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 309
[2019-11-06 19:09:03,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:09:03,773 INFO  L225             Difference]: With dead ends: 8394
[2019-11-06 19:09:03,773 INFO  L226             Difference]: Without dead ends: 4245
[2019-11-06 19:09:03,786 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2019-11-06 19:09:03,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4245 states.
[2019-11-06 19:09:03,931 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4155.
[2019-11-06 19:09:03,931 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4155 states.
[2019-11-06 19:09:03,943 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5231 transitions.
[2019-11-06 19:09:03,943 INFO  L78                 Accepts]: Start accepts. Automaton has 4155 states and 5231 transitions. Word has length 309
[2019-11-06 19:09:03,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:09:03,945 INFO  L462      AbstractCegarLoop]: Abstraction has 4155 states and 5231 transitions.
[2019-11-06 19:09:03,945 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-11-06 19:09:03,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 4155 states and 5231 transitions.
[2019-11-06 19:09:03,963 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 316
[2019-11-06 19:09:03,963 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:09:03,964 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-06 19:09:04,176 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:09:04,177 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:09:04,177 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:09:04,177 INFO  L82        PathProgramCache]: Analyzing trace with hash -1568781761, now seen corresponding path program 1 times
[2019-11-06 19:09:04,178 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:09:04,178 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566636076]
[2019-11-06 19:09:04,178 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:09:04,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:04,346 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:04,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:04,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:04,578 INFO  L134       CoverageAnalysis]: Checked inductivity of 239 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2019-11-06 19:09:04,578 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566636076]
[2019-11-06 19:09:04,578 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203576421]
[2019-11-06 19:09:04,579 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 19:09:04,732 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:09:04,734 INFO  L256         TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-11-06 19:09:04,738 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:09:04,769 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:09:04,770 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:09:06,060 WARN  L191               SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 24 DAG size of output: 22
[2019-11-06 19:09:06,117 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:09:07,914 INFO  L134       CoverageAnalysis]: Checked inductivity of 239 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2019-11-06 19:09:07,914 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:09:07,914 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11
[2019-11-06 19:09:07,915 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549415513]
[2019-11-06 19:09:07,916 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-11-06 19:09:07,916 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:09:07,916 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-11-06 19:09:07,916 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110
[2019-11-06 19:09:07,917 INFO  L87              Difference]: Start difference. First operand 4155 states and 5231 transitions. Second operand 11 states.