/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/Problem17_label30.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 21:21:31,755 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-23 21:21:31,808 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 21:21:31,822 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 21:21:31,822 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 21:21:31,823 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-23 21:21:31,824 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-23 21:21:31,824 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-23 21:21:31,824 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 21:21:31,824 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 21:21:31,825 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 21:21:31,825 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 21:21:31,825 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 21:21:31,825 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 21:21:31,825 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 21:21:31,826 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 21:21:31,826 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-23 21:21:31,826 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 21:21:31,826 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 21:21:31,826 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-23 21:21:31,827 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 21:21:31,827 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 21:21:31,827 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-23 21:21:31,827 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 21:21:31,827 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 21:21:31,828 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 21:21:31,828 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 21:21:31,828 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 21:21:31,828 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 21:21:31,829 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-23 21:21:31,829 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 21:21:31,829 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 21:21:31,829 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 21:21:32,139 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 21:21:32,161 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 21:21:32,164 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 21:21:32,166 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 21:21:32,166 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 21:21:32,167 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label30.c
[2019-11-23 21:21:32,228 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3977429a/cd7918b7f055481f85225f8b488f25d3/FLAGe2b7b88e3
[2019-11-23 21:21:32,891 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 21:21:32,892 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label30.c
[2019-11-23 21:21:32,916 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3977429a/cd7918b7f055481f85225f8b488f25d3/FLAGe2b7b88e3
[2019-11-23 21:21:33,064 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3977429a/cd7918b7f055481f85225f8b488f25d3
[2019-11-23 21:21:33,076 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 21:21:33,078 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 21:21:33,079 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 21:21:33,079 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 21:21:33,083 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 21:21:33,084 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:33" (1/1) ...
[2019-11-23 21:21:33,087 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f8565c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:33, skipping insertion in model container
[2019-11-23 21:21:33,087 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:33" (1/1) ...
[2019-11-23 21:21:33,096 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 21:21:33,201 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 21:21:34,330 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:21:34,335 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 21:21:34,849 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 21:21:34,870 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 21:21:34,871 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34 WrapperNode
[2019-11-23 21:21:34,871 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 21:21:34,873 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 21:21:34,873 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 21:21:34,873 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 21:21:34,882 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:34,935 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,155 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 21:21:35,156 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 21:21:35,156 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 21:21:35,156 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 21:21:35,169 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,169 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,201 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,201 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,340 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,363 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,421 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (1/1) ...
[2019-11-23 21:21:35,475 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 21:21:35,475 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 21:21:35,476 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 21:21:35,476 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 21:21:35,477 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (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 21:21:35,538 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 21:21:35,538 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 21:21:42,501 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 21:21:42,502 INFO  L284             CfgBuilder]: Removed 9 assume(true) statements.
[2019-11-23 21:21:42,504 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:42 BoogieIcfgContainer
[2019-11-23 21:21:42,505 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 21:21:42,507 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 21:21:42,508 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 21:21:42,512 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 21:21:42,513 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:33" (1/3) ...
[2019-11-23 21:21:42,515 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aefa95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:42, skipping insertion in model container
[2019-11-23 21:21:42,515 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:34" (2/3) ...
[2019-11-23 21:21:42,516 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aefa95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:42, skipping insertion in model container
[2019-11-23 21:21:42,516 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:42" (3/3) ...
[2019-11-23 21:21:42,518 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem17_label30.c
[2019-11-23 21:21:42,528 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 21:21:42,540 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 21:21:42,554 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 21:21:42,603 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 21:21:42,603 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 21:21:42,604 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 21:21:42,604 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 21:21:42,604 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 21:21:42,605 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 21:21:42,605 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 21:21:42,606 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 21:21:42,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 590 states.
[2019-11-23 21:21:42,648 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2019-11-23 21:21:42,648 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:21:42,649 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]
[2019-11-23 21:21:42,650 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:21:42,656 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:21:42,656 INFO  L82        PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times
[2019-11-23 21:21:42,667 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:21:42,667 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744671335]
[2019-11-23 21:21:42,668 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:21:42,825 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:21:42,974 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 21:21:42,977 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744671335]
[2019-11-23 21:21:42,978 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:21:42,978 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:21:42,980 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087583285]
[2019-11-23 21:21:42,985 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:21:42,986 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:21:43,000 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:21:43,001 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:21:43,003 INFO  L87              Difference]: Start difference. First operand 590 states. Second operand 4 states.
[2019-11-23 21:21:50,102 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:21:50,102 INFO  L93              Difference]: Finished difference Result 2089 states and 3897 transitions.
[2019-11-23 21:21:50,103 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:21:50,105 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 24
[2019-11-23 21:21:50,105 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:21:50,134 INFO  L225             Difference]: With dead ends: 2089
[2019-11-23 21:21:50,134 INFO  L226             Difference]: Without dead ends: 1419
[2019-11-23 21:21:50,141 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 21:21:50,162 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1419 states.
[2019-11-23 21:21:50,250 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1412.
[2019-11-23 21:21:50,252 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1412 states.
[2019-11-23 21:21:50,257 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2069 transitions.
[2019-11-23 21:21:50,259 INFO  L78                 Accepts]: Start accepts. Automaton has 1412 states and 2069 transitions. Word has length 24
[2019-11-23 21:21:50,259 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:21:50,259 INFO  L462      AbstractCegarLoop]: Abstraction has 1412 states and 2069 transitions.
[2019-11-23 21:21:50,259 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:21:50,260 INFO  L276                IsEmpty]: Start isEmpty. Operand 1412 states and 2069 transitions.
[2019-11-23 21:21:50,263 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 95
[2019-11-23 21:21:50,263 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:21:50,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:21:50,264 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:21:50,264 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:21:50,264 INFO  L82        PathProgramCache]: Analyzing trace with hash -1222847970, now seen corresponding path program 1 times
[2019-11-23 21:21:50,265 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:21:50,265 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306752886]
[2019-11-23 21:21:50,265 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:21:50,319 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:21:50,500 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:21:50,500 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306752886]
[2019-11-23 21:21:50,501 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156688906]
[2019-11-23 21:21:50,501 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 21:21:50,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:21:50,570 INFO  L255         TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-11-23 21:21:50,578 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:21:50,617 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,619 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,621 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,627 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,628 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,629 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,633 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:50,636 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:21:51,025 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:21:51,025 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 21:21:51,025 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7
[2019-11-23 21:21:51,027 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063206079]
[2019-11-23 21:21:51,028 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:21:51,029 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:21:51,029 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:21:51,029 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:21:51,029 INFO  L87              Difference]: Start difference. First operand 1412 states and 2069 transitions. Second operand 4 states.
[2019-11-23 21:21:59,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:21:59,960 INFO  L93              Difference]: Finished difference Result 5459 states and 8041 transitions.
[2019-11-23 21:21:59,960 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:21:59,960 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 94
[2019-11-23 21:21:59,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:21:59,980 INFO  L225             Difference]: With dead ends: 5459
[2019-11-23 21:21:59,980 INFO  L226             Difference]: Without dead ends: 4049
[2019-11-23 21:21:59,984 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2019-11-23 21:21:59,989 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4049 states.
[2019-11-23 21:22:00,058 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4007.
[2019-11-23 21:22:00,059 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4007 states.
[2019-11-23 21:22:00,067 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5465 transitions.
[2019-11-23 21:22:00,068 INFO  L78                 Accepts]: Start accepts. Automaton has 4007 states and 5465 transitions. Word has length 94
[2019-11-23 21:22:00,068 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:00,068 INFO  L462      AbstractCegarLoop]: Abstraction has 4007 states and 5465 transitions.
[2019-11-23 21:22:00,069 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:22:00,069 INFO  L276                IsEmpty]: Start isEmpty. Operand 4007 states and 5465 transitions.
[2019-11-23 21:22:00,075 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 136
[2019-11-23 21:22:00,076 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:00,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:00,281 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:22:00,282 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:00,282 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:00,282 INFO  L82        PathProgramCache]: Analyzing trace with hash -54792235, now seen corresponding path program 1 times
[2019-11-23 21:22:00,283 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:00,283 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809095534]
[2019-11-23 21:22:00,284 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:00,365 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:00,576 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:22:00,576 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809095534]
[2019-11-23 21:22:00,577 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:00,577 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 21:22:00,577 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348223883]
[2019-11-23 21:22:00,578 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:22:00,578 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:00,578 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:22:00,579 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:22:00,579 INFO  L87              Difference]: Start difference. First operand 4007 states and 5465 transitions. Second operand 3 states.
[2019-11-23 21:22:03,379 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:03,379 INFO  L93              Difference]: Finished difference Result 11843 states and 16152 transitions.
[2019-11-23 21:22:03,380 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:22:03,380 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 135
[2019-11-23 21:22:03,381 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:03,409 INFO  L225             Difference]: With dead ends: 11843
[2019-11-23 21:22:03,409 INFO  L226             Difference]: Without dead ends: 6554
[2019-11-23 21:22:03,417 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:22:03,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6554 states.
[2019-11-23 21:22:03,502 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 5273.
[2019-11-23 21:22:03,502 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5273 states.
[2019-11-23 21:22:03,511 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 6520 transitions.
[2019-11-23 21:22:03,511 INFO  L78                 Accepts]: Start accepts. Automaton has 5273 states and 6520 transitions. Word has length 135
[2019-11-23 21:22:03,512 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:03,512 INFO  L462      AbstractCegarLoop]: Abstraction has 5273 states and 6520 transitions.
[2019-11-23 21:22:03,513 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:22:03,513 INFO  L276                IsEmpty]: Start isEmpty. Operand 5273 states and 6520 transitions.
[2019-11-23 21:22:03,515 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 186
[2019-11-23 21:22:03,516 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:03,516 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 21:22:03,516 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:03,516 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:03,517 INFO  L82        PathProgramCache]: Analyzing trace with hash 1781381787, now seen corresponding path program 1 times
[2019-11-23 21:22:03,517 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:03,517 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823182884]
[2019-11-23 21:22:03,517 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:03,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:03,689 INFO  L134       CoverageAnalysis]: Checked inductivity of 118 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:22:03,689 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823182884]
[2019-11-23 21:22:03,689 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:03,689 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 21:22:03,690 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336306800]
[2019-11-23 21:22:03,690 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:22:03,691 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:03,691 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:22:03,691 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:22:03,691 INFO  L87              Difference]: Start difference. First operand 5273 states and 6520 transitions. Second operand 3 states.
[2019-11-23 21:22:06,440 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:06,440 INFO  L93              Difference]: Finished difference Result 13952 states and 17585 transitions.
[2019-11-23 21:22:06,441 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:22:06,441 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 185
[2019-11-23 21:22:06,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:06,478 INFO  L225             Difference]: With dead ends: 13952
[2019-11-23 21:22:06,478 INFO  L226             Difference]: Without dead ends: 8681
[2019-11-23 21:22:06,487 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:22:06,496 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8681 states.
[2019-11-23 21:22:06,618 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8681 to 8681.
[2019-11-23 21:22:06,618 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8681 states.
[2019-11-23 21:22:06,634 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8681 states to 8681 states and 10515 transitions.
[2019-11-23 21:22:06,635 INFO  L78                 Accepts]: Start accepts. Automaton has 8681 states and 10515 transitions. Word has length 185
[2019-11-23 21:22:06,635 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:06,636 INFO  L462      AbstractCegarLoop]: Abstraction has 8681 states and 10515 transitions.
[2019-11-23 21:22:06,636 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:22:06,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 8681 states and 10515 transitions.
[2019-11-23 21:22:06,642 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 249
[2019-11-23 21:22:06,643 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:06,643 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:22:06,643 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:06,644 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:06,644 INFO  L82        PathProgramCache]: Analyzing trace with hash -1618238404, now seen corresponding path program 1 times
[2019-11-23 21:22:06,644 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:06,644 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272524096]
[2019-11-23 21:22:06,645 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:06,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:07,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 21:22:07,213 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272524096]
[2019-11-23 21:22:07,214 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145870762]
[2019-11-23 21:22:07,214 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 21:22:07,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:07,324 INFO  L255         TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-23 21:22:07,342 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 21:22:07,354 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:22:07,355 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-23 21:22:07,457 INFO  L134       CoverageAnalysis]: Checked inductivity of 274 backedges. 182 proven. 70 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2019-11-23 21:22:07,457 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-23 21:22:07,457 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 3] total 10
[2019-11-23 21:22:07,458 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844479366]
[2019-11-23 21:22:07,459 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-11-23 21:22:07,459 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:07,460 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-11-23 21:22:07,460 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-11-23 21:22:07,460 INFO  L87              Difference]: Start difference. First operand 8681 states and 10515 transitions. Second operand 11 states.
[2019-11-23 21:22:26,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:26,680 INFO  L93              Difference]: Finished difference Result 42471 states and 52315 transitions.
[2019-11-23 21:22:26,680 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2019-11-23 21:22:26,681 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 248
[2019-11-23 21:22:26,681 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:26,747 INFO  L225             Difference]: With dead ends: 42471
[2019-11-23 21:22:26,747 INFO  L226             Difference]: Without dead ends: 26950
[2019-11-23 21:22:26,764 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210
[2019-11-23 21:22:26,792 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26950 states.
[2019-11-23 21:22:27,169 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26950 to 23530.
[2019-11-23 21:22:27,169 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23530 states.
[2019-11-23 21:22:27,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23530 states to 23530 states and 26512 transitions.
[2019-11-23 21:22:27,200 INFO  L78                 Accepts]: Start accepts. Automaton has 23530 states and 26512 transitions. Word has length 248
[2019-11-23 21:22:27,200 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:27,200 INFO  L462      AbstractCegarLoop]: Abstraction has 23530 states and 26512 transitions.
[2019-11-23 21:22:27,201 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-11-23 21:22:27,201 INFO  L276                IsEmpty]: Start isEmpty. Operand 23530 states and 26512 transitions.
[2019-11-23 21:22:27,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 444
[2019-11-23 21:22:27,217 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:27,218 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 21:22:27,422 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 21:22:27,423 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:27,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:27,424 INFO  L82        PathProgramCache]: Analyzing trace with hash 208671156, now seen corresponding path program 1 times
[2019-11-23 21:22:27,424 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:27,425 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524774454]
[2019-11-23 21:22:27,425 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:27,549 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:27,890 INFO  L134       CoverageAnalysis]: Checked inductivity of 597 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked.
[2019-11-23 21:22:27,892 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524774454]
[2019-11-23 21:22:27,893 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:27,893 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:22:27,894 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010762336]
[2019-11-23 21:22:27,895 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:22:27,895 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:27,895 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:22:27,896 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:22:27,900 INFO  L87              Difference]: Start difference. First operand 23530 states and 26512 transitions. Second operand 4 states.
[2019-11-23 21:22:34,637 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:34,637 INFO  L93              Difference]: Finished difference Result 60700 states and 68709 transitions.
[2019-11-23 21:22:34,637 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:22:34,638 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 443
[2019-11-23 21:22:34,638 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:34,691 INFO  L225             Difference]: With dead ends: 60700
[2019-11-23 21:22:34,691 INFO  L226             Difference]: Without dead ends: 37597
[2019-11-23 21:22:34,718 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:22:34,749 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37597 states.
[2019-11-23 21:22:35,080 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37597 to 36289.
[2019-11-23 21:22:35,081 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36289 states.
[2019-11-23 21:22:35,119 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36289 states to 36289 states and 40546 transitions.
[2019-11-23 21:22:35,120 INFO  L78                 Accepts]: Start accepts. Automaton has 36289 states and 40546 transitions. Word has length 443
[2019-11-23 21:22:35,120 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:35,120 INFO  L462      AbstractCegarLoop]: Abstraction has 36289 states and 40546 transitions.
[2019-11-23 21:22:35,121 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:22:35,121 INFO  L276                IsEmpty]: Start isEmpty. Operand 36289 states and 40546 transitions.
[2019-11-23 21:22:35,137 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 456
[2019-11-23 21:22:35,137 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:35,138 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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]
[2019-11-23 21:22:35,138 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:35,138 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:35,138 INFO  L82        PathProgramCache]: Analyzing trace with hash 548959328, now seen corresponding path program 1 times
[2019-11-23 21:22:35,139 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:35,139 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277001173]
[2019-11-23 21:22:35,139 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:35,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:36,586 INFO  L134       CoverageAnalysis]: Checked inductivity of 647 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked.
[2019-11-23 21:22:36,587 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277001173]
[2019-11-23 21:22:36,587 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:36,587 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:22:36,587 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547056825]
[2019-11-23 21:22:36,588 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:22:36,588 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:36,589 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:22:36,589 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:22:36,589 INFO  L87              Difference]: Start difference. First operand 36289 states and 40546 transitions. Second operand 4 states.
[2019-11-23 21:22:40,476 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:40,477 INFO  L93              Difference]: Finished difference Result 98115 states and 109260 transitions.
[2019-11-23 21:22:40,477 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:22:40,477 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 455
[2019-11-23 21:22:40,478 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:40,541 INFO  L225             Difference]: With dead ends: 98115
[2019-11-23 21:22:40,541 INFO  L226             Difference]: Without dead ends: 62253
[2019-11-23 21:22:40,572 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:22:40,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62253 states.
[2019-11-23 21:22:41,306 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62253 to 60537.
[2019-11-23 21:22:41,306 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60537 states.
[2019-11-23 21:22:41,376 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60537 states to 60537 states and 65870 transitions.
[2019-11-23 21:22:41,376 INFO  L78                 Accepts]: Start accepts. Automaton has 60537 states and 65870 transitions. Word has length 455
[2019-11-23 21:22:41,377 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:41,377 INFO  L462      AbstractCegarLoop]: Abstraction has 60537 states and 65870 transitions.
[2019-11-23 21:22:41,377 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:22:41,377 INFO  L276                IsEmpty]: Start isEmpty. Operand 60537 states and 65870 transitions.
[2019-11-23 21:22:41,402 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 478
[2019-11-23 21:22:41,402 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:41,403 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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]
[2019-11-23 21:22:41,403 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:41,404 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:41,404 INFO  L82        PathProgramCache]: Analyzing trace with hash 1873954327, now seen corresponding path program 1 times
[2019-11-23 21:22:41,404 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:41,404 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858611406]
[2019-11-23 21:22:41,405 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:41,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:42,059 INFO  L134       CoverageAnalysis]: Checked inductivity of 674 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-23 21:22:42,060 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858611406]
[2019-11-23 21:22:42,061 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:42,061 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:22:42,062 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626830805]
[2019-11-23 21:22:42,063 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:22:42,063 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:42,064 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:22:42,074 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:22:42,075 INFO  L87              Difference]: Start difference. First operand 60537 states and 65870 transitions. Second operand 4 states.
[2019-11-23 21:22:45,583 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:45,584 INFO  L93              Difference]: Finished difference Result 133002 states and 144905 transitions.
[2019-11-23 21:22:45,584 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:22:45,584 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 477
[2019-11-23 21:22:45,585 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:45,657 INFO  L225             Difference]: With dead ends: 133002
[2019-11-23 21:22:45,657 INFO  L226             Difference]: Without dead ends: 72892
[2019-11-23 21:22:45,694 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:22:45,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72892 states.
[2019-11-23 21:22:47,575 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72892 to 64366.
[2019-11-23 21:22:47,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64366 states.
[2019-11-23 21:22:47,625 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64366 states to 64366 states and 69596 transitions.
[2019-11-23 21:22:47,626 INFO  L78                 Accepts]: Start accepts. Automaton has 64366 states and 69596 transitions. Word has length 477
[2019-11-23 21:22:47,626 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:47,626 INFO  L462      AbstractCegarLoop]: Abstraction has 64366 states and 69596 transitions.
[2019-11-23 21:22:47,626 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:22:47,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 64366 states and 69596 transitions.
[2019-11-23 21:22:47,647 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 481
[2019-11-23 21:22:47,647 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:47,648 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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]
[2019-11-23 21:22:47,648 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:47,648 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:47,649 INFO  L82        PathProgramCache]: Analyzing trace with hash -697427075, now seen corresponding path program 1 times
[2019-11-23 21:22:47,649 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:47,649 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867771631]
[2019-11-23 21:22:47,649 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:47,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:48,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 672 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked.
[2019-11-23 21:22:48,103 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867771631]
[2019-11-23 21:22:48,103 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:48,104 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 21:22:48,104 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373363171]
[2019-11-23 21:22:48,105 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:22:48,106 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:48,106 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:22:48,106 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:22:48,107 INFO  L87              Difference]: Start difference. First operand 64366 states and 69596 transitions. Second operand 3 states.
[2019-11-23 21:22:50,067 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:22:50,067 INFO  L93              Difference]: Finished difference Result 124465 states and 134381 transitions.
[2019-11-23 21:22:50,069 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:22:50,069 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 480
[2019-11-23 21:22:50,070 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:22:50,138 INFO  L225             Difference]: With dead ends: 124465
[2019-11-23 21:22:50,139 INFO  L226             Difference]: Without dead ends: 60950
[2019-11-23 21:22:50,175 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:22:50,226 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60950 states.
[2019-11-23 21:22:50,706 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60950 to 60943.
[2019-11-23 21:22:50,706 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60943 states.
[2019-11-23 21:22:50,754 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60943 states to 60943 states and 65632 transitions.
[2019-11-23 21:22:50,754 INFO  L78                 Accepts]: Start accepts. Automaton has 60943 states and 65632 transitions. Word has length 480
[2019-11-23 21:22:50,755 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:22:50,755 INFO  L462      AbstractCegarLoop]: Abstraction has 60943 states and 65632 transitions.
[2019-11-23 21:22:50,755 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:22:50,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 60943 states and 65632 transitions.
[2019-11-23 21:22:50,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 529
[2019-11-23 21:22:50,772 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:22:50,773 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 21:22:50,773 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:22:50,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:22:50,774 INFO  L82        PathProgramCache]: Analyzing trace with hash -752951309, now seen corresponding path program 1 times
[2019-11-23 21:22:50,774 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:22:50,774 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091175397]
[2019-11-23 21:22:50,775 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:22:50,856 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:22:51,748 INFO  L134       CoverageAnalysis]: Checked inductivity of 686 backedges. 582 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-23 21:22:51,749 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091175397]
[2019-11-23 21:22:51,749 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:22:51,750 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:22:51,750 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633068110]
[2019-11-23 21:22:51,751 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:22:51,752 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:22:51,752 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:22:51,752 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:22:51,752 INFO  L87              Difference]: Start difference. First operand 60943 states and 65632 transitions. Second operand 4 states.