/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label33.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 21:08:55,723 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-23 21:08:55,810 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
[2019-11-23 21:08:55,846 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 21:08:55,847 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 21:08:55,848 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-23 21:08:55,848 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-23 21:08:55,848 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-23 21:08:55,852 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 21:08:55,852 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 21:08:55,852 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 21:08:55,852 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 21:08:55,853 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 21:08:55,853 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 21:08:55,853 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 21:08:55,853 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 21:08:55,853 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-23 21:08:55,853 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 21:08:55,854 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 21:08:55,854 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-23 21:08:55,854 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 21:08:55,854 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 21:08:55,854 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-23 21:08:55,855 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 21:08:55,857 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 21:08:55,857 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 21:08:55,857 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 21:08:55,857 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 21:08:55,858 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 21:08:55,858 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-23 21:08:55,858 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 21:08:55,858 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 21:08:55,858 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 21:08:56,130 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 21:08:56,143 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 21:08:56,147 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 21:08:56,148 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 21:08:56,149 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 21:08:56,150 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label33.c
[2019-11-23 21:08:56,222 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bee482a/f3bd0280f14f4f95987dd04dcdc3d183/FLAG785195793
[2019-11-23 21:08:56,984 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 21:08:56,985 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label33.c
[2019-11-23 21:08:57,011 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bee482a/f3bd0280f14f4f95987dd04dcdc3d183/FLAG785195793
[2019-11-23 21:08:57,039 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bee482a/f3bd0280f14f4f95987dd04dcdc3d183
[2019-11-23 21:08:57,050 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 21:08:57,052 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 21:08:57,053 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 21:08:57,053 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 21:08:57,057 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 21:08:57,058 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:57" (1/1) ...
[2019-11-23 21:08:57,061 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a08c79e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:57, skipping insertion in model container
[2019-11-23 21:08:57,061 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:57" (1/1) ...
[2019-11-23 21:08:57,070 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 21:08:57,206 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 21:08:58,757 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:08:58,762 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 21:08:59,427 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:08:59,456 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 21:08:59,456 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59 WrapperNode
[2019-11-23 21:08:59,456 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 21:08:59,457 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 21:08:59,457 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 21:08:59,458 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 21:08:59,466 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:08:59,520 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:08:59,787 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 21:08:59,787 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 21:08:59,787 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 21:08:59,788 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 21:08:59,798 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:08:59,798 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:08:59,832 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:08:59,832 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:08:59,961 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:09:00,004 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:09:00,045 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (1/1) ...
[2019-11-23 21:09:00,086 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 21:09:00,087 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 21:09:00,087 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 21:09:00,087 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 21:09:00,088 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (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
[2019-11-23 21:09:00,154 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 21:09:00,154 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 21:09:05,018 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 21:09:05,018 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 21:09:05,020 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:05 BoogieIcfgContainer
[2019-11-23 21:09:05,021 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 21:09:05,023 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 21:09:05,024 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 21:09:05,027 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 21:09:05,028 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:57" (1/3) ...
[2019-11-23 21:09:05,034 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120751e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:05, skipping insertion in model container
[2019-11-23 21:09:05,034 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:59" (2/3) ...
[2019-11-23 21:09:05,034 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120751e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:05, skipping insertion in model container
[2019-11-23 21:09:05,036 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:05" (3/3) ...
[2019-11-23 21:09:05,038 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem12_label33.c
[2019-11-23 21:09:05,048 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 21:09:05,059 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 21:09:05,071 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 21:09:05,124 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 21:09:05,124 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 21:09:05,124 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 21:09:05,124 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 21:09:05,124 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 21:09:05,125 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 21:09:05,126 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 21:09:05,126 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 21:09:05,171 INFO  L276                IsEmpty]: Start isEmpty. Operand 818 states.
[2019-11-23 21:09:05,183 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2019-11-23 21:09:05,183 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:05,185 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]
[2019-11-23 21:09:05,186 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:05,192 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:05,193 INFO  L82        PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times
[2019-11-23 21:09:05,203 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:05,204 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272468593]
[2019-11-23 21:09:05,204 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:05,376 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:05,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:09:05,564 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272468593]
[2019-11-23 21:09:05,565 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:05,566 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:09:05,568 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677195691]
[2019-11-23 21:09:05,573 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:05,573 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:05,587 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:05,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:05,590 INFO  L87              Difference]: Start difference. First operand 818 states. Second operand 4 states.
[2019-11-23 21:09:15,329 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:15,330 INFO  L93              Difference]: Finished difference Result 3142 states and 6130 transitions.
[2019-11-23 21:09:15,330 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:15,332 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 49
[2019-11-23 21:09:15,333 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:15,371 INFO  L225             Difference]: With dead ends: 3142
[2019-11-23 21:09:15,371 INFO  L226             Difference]: Without dead ends: 2257
[2019-11-23 21:09:15,379 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:15,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2257 states.
[2019-11-23 21:09:15,518 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257.
[2019-11-23 21:09:15,519 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2257 states.
[2019-11-23 21:09:15,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3685 transitions.
[2019-11-23 21:09:15,529 INFO  L78                 Accepts]: Start accepts. Automaton has 2257 states and 3685 transitions. Word has length 49
[2019-11-23 21:09:15,529 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:15,530 INFO  L462      AbstractCegarLoop]: Abstraction has 2257 states and 3685 transitions.
[2019-11-23 21:09:15,530 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:15,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 2257 states and 3685 transitions.
[2019-11-23 21:09:15,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 121
[2019-11-23 21:09:15,535 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:15,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:09:15,536 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:15,536 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:15,537 INFO  L82        PathProgramCache]: Analyzing trace with hash -2123608565, now seen corresponding path program 1 times
[2019-11-23 21:09:15,537 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:15,537 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36402973]
[2019-11-23 21:09:15,537 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:15,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:15,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:09:15,707 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36402973]
[2019-11-23 21:09:15,707 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:15,707 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:09:15,708 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515708937]
[2019-11-23 21:09:15,711 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:15,711 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:15,711 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:15,712 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:15,712 INFO  L87              Difference]: Start difference. First operand 2257 states and 3685 transitions. Second operand 4 states.
[2019-11-23 21:09:23,433 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:23,433 INFO  L93              Difference]: Finished difference Result 9018 states and 14732 transitions.
[2019-11-23 21:09:23,434 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:23,434 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 120
[2019-11-23 21:09:23,434 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:23,468 INFO  L225             Difference]: With dead ends: 9018
[2019-11-23 21:09:23,470 INFO  L226             Difference]: Without dead ends: 6763
[2019-11-23 21:09:23,474 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:23,481 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6763 states.
[2019-11-23 21:09:23,590 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763.
[2019-11-23 21:09:23,590 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6763 states.
[2019-11-23 21:09:23,607 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 10459 transitions.
[2019-11-23 21:09:23,607 INFO  L78                 Accepts]: Start accepts. Automaton has 6763 states and 10459 transitions. Word has length 120
[2019-11-23 21:09:23,610 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:23,610 INFO  L462      AbstractCegarLoop]: Abstraction has 6763 states and 10459 transitions.
[2019-11-23 21:09:23,610 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:23,611 INFO  L276                IsEmpty]: Start isEmpty. Operand 6763 states and 10459 transitions.
[2019-11-23 21:09:23,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 190
[2019-11-23 21:09:23,622 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:23,623 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, 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]
[2019-11-23 21:09:23,623 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:23,623 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:23,624 INFO  L82        PathProgramCache]: Analyzing trace with hash 2122225716, now seen corresponding path program 1 times
[2019-11-23 21:09:23,624 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:23,624 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195683155]
[2019-11-23 21:09:23,624 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:23,698 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:24,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 161 backedges. 144 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2019-11-23 21:09:24,052 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195683155]
[2019-11-23 21:09:24,052 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032564171]
[2019-11-23 21:09:24,052 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
[2019-11-23 21:09:24,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:24,190 INFO  L255         TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-11-23 21:09:24,213 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:24,345 INFO  L134       CoverageAnalysis]: Checked inductivity of 161 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2019-11-23 21:09:24,346 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:24,346 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-23 21:09:24,346 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247777125]
[2019-11-23 21:09:24,349 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:24,349 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:24,350 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:24,350 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:24,350 INFO  L87              Difference]: Start difference. First operand 6763 states and 10459 transitions. Second operand 3 states.
[2019-11-23 21:09:28,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:28,440 INFO  L93              Difference]: Finished difference Result 13561 states and 20953 transitions.
[2019-11-23 21:09:28,440 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:28,441 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 189
[2019-11-23 21:09:28,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:28,485 INFO  L225             Difference]: With dead ends: 13561
[2019-11-23 21:09:28,485 INFO  L226             Difference]: Without dead ends: 6763
[2019-11-23 21:09:28,495 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:28,504 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6763 states.
[2019-11-23 21:09:28,621 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763.
[2019-11-23 21:09:28,630 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6763 states.
[2019-11-23 21:09:28,647 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9743 transitions.
[2019-11-23 21:09:28,647 INFO  L78                 Accepts]: Start accepts. Automaton has 6763 states and 9743 transitions. Word has length 189
[2019-11-23 21:09:28,648 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:28,648 INFO  L462      AbstractCegarLoop]: Abstraction has 6763 states and 9743 transitions.
[2019-11-23 21:09:28,648 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:09:28,649 INFO  L276                IsEmpty]: Start isEmpty. Operand 6763 states and 9743 transitions.
[2019-11-23 21:09:28,652 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 191
[2019-11-23 21:09:28,652 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:28,653 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, 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]
[2019-11-23 21:09:28,857 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:09:28,857 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:28,857 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:28,857 INFO  L82        PathProgramCache]: Analyzing trace with hash -2129889265, now seen corresponding path program 1 times
[2019-11-23 21:09:28,858 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:28,859 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053699297]
[2019-11-23 21:09:28,859 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:28,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:29,062 INFO  L134       CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked.
[2019-11-23 21:09:29,063 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053699297]
[2019-11-23 21:09:29,063 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:29,063 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:09:29,064 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13103538]
[2019-11-23 21:09:29,065 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:29,065 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:29,065 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:29,066 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:29,066 INFO  L87              Difference]: Start difference. First operand 6763 states and 9743 transitions. Second operand 4 states.
[2019-11-23 21:09:35,613 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:35,614 INFO  L93              Difference]: Finished difference Result 27044 states and 38965 transitions.
[2019-11-23 21:09:35,614 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:35,614 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 190
[2019-11-23 21:09:35,614 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:35,687 INFO  L225             Difference]: With dead ends: 27044
[2019-11-23 21:09:35,687 INFO  L226             Difference]: Without dead ends: 20283
[2019-11-23 21:09:35,700 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:35,722 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20283 states.
[2019-11-23 21:09:36,063 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 11269.
[2019-11-23 21:09:36,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11269 states.
[2019-11-23 21:09:36,089 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 15278 transitions.
[2019-11-23 21:09:36,090 INFO  L78                 Accepts]: Start accepts. Automaton has 11269 states and 15278 transitions. Word has length 190
[2019-11-23 21:09:36,091 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:36,091 INFO  L462      AbstractCegarLoop]: Abstraction has 11269 states and 15278 transitions.
[2019-11-23 21:09:36,091 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:36,091 INFO  L276                IsEmpty]: Start isEmpty. Operand 11269 states and 15278 transitions.
[2019-11-23 21:09:36,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 198
[2019-11-23 21:09:36,096 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:36,096 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, 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]
[2019-11-23 21:09:36,097 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:36,097 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:36,097 INFO  L82        PathProgramCache]: Analyzing trace with hash 1398374944, now seen corresponding path program 1 times
[2019-11-23 21:09:36,097 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:36,099 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710675464]
[2019-11-23 21:09:36,099 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:36,128 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:36,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked.
[2019-11-23 21:09:36,235 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710675464]
[2019-11-23 21:09:36,236 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:36,236 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:09:36,236 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563712675]
[2019-11-23 21:09:36,237 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:09:36,237 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:36,237 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:09:36,237 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:36,238 INFO  L87              Difference]: Start difference. First operand 11269 states and 15278 transitions. Second operand 4 states.
[2019-11-23 21:09:43,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:43,481 INFO  L93              Difference]: Finished difference Result 42813 states and 58090 transitions.
[2019-11-23 21:09:43,487 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:43,487 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 197
[2019-11-23 21:09:43,488 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:43,543 INFO  L225             Difference]: With dead ends: 42813
[2019-11-23 21:09:43,543 INFO  L226             Difference]: Without dead ends: 31546
[2019-11-23 21:09:43,557 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:09:43,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31546 states.
[2019-11-23 21:09:43,937 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31546 to 30044.
[2019-11-23 21:09:43,937 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30044 states.
[2019-11-23 21:09:44,003 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 37209 transitions.
[2019-11-23 21:09:44,003 INFO  L78                 Accepts]: Start accepts. Automaton has 30044 states and 37209 transitions. Word has length 197
[2019-11-23 21:09:44,004 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:44,004 INFO  L462      AbstractCegarLoop]: Abstraction has 30044 states and 37209 transitions.
[2019-11-23 21:09:44,004 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:09:44,004 INFO  L276                IsEmpty]: Start isEmpty. Operand 30044 states and 37209 transitions.
[2019-11-23 21:09:44,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 263
[2019-11-23 21:09:44,011 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:44,011 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:09:44,012 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:44,012 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:44,012 INFO  L82        PathProgramCache]: Analyzing trace with hash -1586120741, now seen corresponding path program 1 times
[2019-11-23 21:09:44,013 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:44,013 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984906608]
[2019-11-23 21:09:44,013 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:44,093 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:44,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked.
[2019-11-23 21:09:44,557 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984906608]
[2019-11-23 21:09:44,557 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:09:44,558 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-23 21:09:44,558 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731924732]
[2019-11-23 21:09:44,559 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-23 21:09:44,559 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:44,559 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-23 21:09:44,559 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30
[2019-11-23 21:09:44,559 INFO  L87              Difference]: Start difference. First operand 30044 states and 37209 transitions. Second operand 6 states.
[2019-11-23 21:09:53,168 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:53,169 INFO  L93              Difference]: Finished difference Result 87873 states and 108781 transitions.
[2019-11-23 21:09:53,186 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:09:53,186 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 262
[2019-11-23 21:09:53,186 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:53,285 INFO  L225             Difference]: With dead ends: 87873
[2019-11-23 21:09:53,285 INFO  L226             Difference]: Without dead ends: 57831
[2019-11-23 21:09:53,319 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:53,369 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57831 states.
[2019-11-23 21:09:53,949 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57831 to 57080.
[2019-11-23 21:09:53,949 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57080 states.
[2019-11-23 21:09:53,999 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57080 states to 57080 states and 67938 transitions.
[2019-11-23 21:09:54,000 INFO  L78                 Accepts]: Start accepts. Automaton has 57080 states and 67938 transitions. Word has length 262
[2019-11-23 21:09:54,000 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:09:54,000 INFO  L462      AbstractCegarLoop]: Abstraction has 57080 states and 67938 transitions.
[2019-11-23 21:09:54,000 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-23 21:09:54,000 INFO  L276                IsEmpty]: Start isEmpty. Operand 57080 states and 67938 transitions.
[2019-11-23 21:09:54,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 377
[2019-11-23 21:09:54,011 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:09:54,014 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:09:54,015 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:09:54,016 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:09:54,016 INFO  L82        PathProgramCache]: Analyzing trace with hash 73039958, now seen corresponding path program 1 times
[2019-11-23 21:09:54,017 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:09:54,017 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411884268]
[2019-11-23 21:09:54,018 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:09:54,083 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:54,583 INFO  L134       CoverageAnalysis]: Checked inductivity of 389 backedges. 242 proven. 6 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked.
[2019-11-23 21:09:54,583 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411884268]
[2019-11-23 21:09:54,584 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81600069]
[2019-11-23 21:09:54,584 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
[2019-11-23 21:09:54,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:09:54,905 INFO  L255         TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 21:09:54,932 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:09:55,023 INFO  L134       CoverageAnalysis]: Checked inductivity of 389 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2019-11-23 21:09:55,023 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:09:55,024 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2019-11-23 21:09:55,024 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386077918]
[2019-11-23 21:09:55,025 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:09:55,025 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:09:55,025 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:09:55,025 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:55,025 INFO  L87              Difference]: Start difference. First operand 57080 states and 67938 transitions. Second operand 3 states.
[2019-11-23 21:09:59,247 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:09:59,247 INFO  L93              Difference]: Finished difference Result 130680 states and 156021 transitions.
[2019-11-23 21:09:59,247 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:09:59,247 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 376
[2019-11-23 21:09:59,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:09:59,362 INFO  L225             Difference]: With dead ends: 130680
[2019-11-23 21:09:59,362 INFO  L226             Difference]: Without dead ends: 73602
[2019-11-23 21:09:59,407 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 375 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-11-23 21:09:59,480 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73602 states.
[2019-11-23 21:10:01,906 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73602 to 69096.
[2019-11-23 21:10:01,906 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69096 states.
[2019-11-23 21:10:01,969 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69096 states to 69096 states and 79011 transitions.
[2019-11-23 21:10:01,970 INFO  L78                 Accepts]: Start accepts. Automaton has 69096 states and 79011 transitions. Word has length 376
[2019-11-23 21:10:01,970 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:10:01,970 INFO  L462      AbstractCegarLoop]: Abstraction has 69096 states and 79011 transitions.
[2019-11-23 21:10:01,970 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:10:01,971 INFO  L276                IsEmpty]: Start isEmpty. Operand 69096 states and 79011 transitions.
[2019-11-23 21:10:01,979 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 381
[2019-11-23 21:10:01,979 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:10:01,980 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:10:02,183 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:10:02,184 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:10:02,184 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:10:02,184 INFO  L82        PathProgramCache]: Analyzing trace with hash 108402636, now seen corresponding path program 1 times
[2019-11-23 21:10:02,185 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:10:02,185 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923177011]
[2019-11-23 21:10:02,185 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:10:02,240 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:10:02,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 393 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked.
[2019-11-23 21:10:02,427 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923177011]
[2019-11-23 21:10:02,427 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:10:02,427 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:10:02,428 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534619475]
[2019-11-23 21:10:02,428 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:10:02,428 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:10:02,429 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:10:02,429 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:10:02,429 INFO  L87              Difference]: Start difference. First operand 69096 states and 79011 transitions. Second operand 4 states.
[2019-11-23 21:10:09,966 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:10:09,966 INFO  L93              Difference]: Finished difference Result 187005 states and 214708 transitions.
[2019-11-23 21:10:09,967 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:10:09,967 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 380
[2019-11-23 21:10:09,967 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:10:10,133 INFO  L225             Difference]: With dead ends: 187005
[2019-11-23 21:10:10,133 INFO  L226             Difference]: Without dead ends: 114907
[2019-11-23 21:10:10,187 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:10:10,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 114907 states.
[2019-11-23 21:10:11,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 107397.
[2019-11-23 21:10:11,812 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 107397 states.
[2019-11-23 21:10:11,976 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 107397 states to 107397 states and 118747 transitions.
[2019-11-23 21:10:11,976 INFO  L78                 Accepts]: Start accepts. Automaton has 107397 states and 118747 transitions. Word has length 380
[2019-11-23 21:10:11,979 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:10:11,979 INFO  L462      AbstractCegarLoop]: Abstraction has 107397 states and 118747 transitions.
[2019-11-23 21:10:11,979 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:10:11,980 INFO  L276                IsEmpty]: Start isEmpty. Operand 107397 states and 118747 transitions.
[2019-11-23 21:10:12,002 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 485
[2019-11-23 21:10:12,002 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:10:12,003 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:10:12,004 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:10:12,004 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:10:12,004 INFO  L82        PathProgramCache]: Analyzing trace with hash -1371657392, now seen corresponding path program 1 times
[2019-11-23 21:10:12,005 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:10:12,005 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862029988]
[2019-11-23 21:10:12,005 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:10:12,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:10:13,122 INFO  L134       CoverageAnalysis]: Checked inductivity of 517 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked.
[2019-11-23 21:10:13,123 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862029988]
[2019-11-23 21:10:13,123 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:10:13,123 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:10:13,124 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926610586]
[2019-11-23 21:10:13,124 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 21:10:13,124 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:10:13,125 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 21:10:13,125 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 21:10:13,125 INFO  L87              Difference]: Start difference. First operand 107397 states and 118747 transitions. Second operand 5 states.