java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 17:59:54,672 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 17:59:54,675 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-13 17:59:54,726 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 17:59:54,727 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-10-13 17:59:54,758 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-13 17:59:54,793 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 17:59:54,793 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 17:59:54,794 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 17:59:54,795 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 17:59:54,795 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 17:59:54,795 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 17:59:54,795 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 17:59:54,795 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 17:59:54,796 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 17:59:54,796 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 17:59:54,796 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 17:59:54,796 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 17:59:54,796 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 17:59:54,797 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 17:59:54,797 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 17:59:54,797 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 17:59:54,799 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 17:59:54,799 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 17:59:54,799 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 17:59:54,800 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 17:59:54,800 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 17:59:54,800 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 17:59:54,800 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 17:59:54,801 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 17:59:54,801 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 17:59:54,801 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 17:59:54,801 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 17:59:54,801 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 17:59:54,802 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 17:59:55,091 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 17:59:55,104 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 17:59:55,108 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 17:59:55,110 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 17:59:55,110 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 17:59:55,111 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c
[2019-10-13 17:59:55,185 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73ae7b61/6a3945552d904cfba82a6c1a7acb297c/FLAG077b17ce2
[2019-10-13 17:59:55,811 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 17:59:55,811 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label20.c
[2019-10-13 17:59:55,837 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73ae7b61/6a3945552d904cfba82a6c1a7acb297c/FLAG077b17ce2
[2019-10-13 17:59:56,027 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73ae7b61/6a3945552d904cfba82a6c1a7acb297c
[2019-10-13 17:59:56,037 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 17:59:56,039 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 17:59:56,042 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 17:59:56,042 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 17:59:56,046 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 17:59:56,047 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:56" (1/1) ...
[2019-10-13 17:59:56,051 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dea371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:56, skipping insertion in model container
[2019-10-13 17:59:56,051 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:56" (1/1) ...
[2019-10-13 17:59:56,060 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 17:59:56,132 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 17:59:56,875 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 17:59:56,886 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 17:59:57,184 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 17:59:57,204 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 17:59:57,205 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57 WrapperNode
[2019-10-13 17:59:57,205 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 17:59:57,206 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 17:59:57,206 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 17:59:57,206 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 17:59:57,221 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,222 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,259 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,260 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,335 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,357 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,379 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
[2019-10-13 17:59:57,392 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 17:59:57,392 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 17:59:57,393 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 17:59:57,393 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 17:59:57,394 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 17:59:57,454 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 17:59:57,455 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 17:59:57,455 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 17:59:57,455 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 17:59:57,455 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 17:59:57,456 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 17:59:57,456 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 17:59:57,456 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 17:59:57,456 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 17:59:57,456 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 17:59:57,457 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 17:59:59,192 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 17:59:59,193 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 17:59:59,195 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:59 BoogieIcfgContainer
[2019-10-13 17:59:59,195 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 17:59:59,197 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 17:59:59,197 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 17:59:59,201 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 17:59:59,202 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:56" (1/3) ...
[2019-10-13 17:59:59,203 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3520ca6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:59, skipping insertion in model container
[2019-10-13 17:59:59,203 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:57" (2/3) ...
[2019-10-13 17:59:59,204 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3520ca6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:59, skipping insertion in model container
[2019-10-13 17:59:59,204 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:59" (3/3) ...
[2019-10-13 17:59:59,214 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label20.c
[2019-10-13 17:59:59,232 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 17:59:59,242 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 17:59:59,253 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 17:59:59,292 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 17:59:59,293 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 17:59:59,294 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 17:59:59,294 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 17:59:59,295 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 17:59:59,295 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 17:59:59,295 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 17:59:59,295 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 17:59:59,337 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-13 17:59:59,344 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-10-13 17:59:59,344 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:59,345 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 17:59:59,347 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:59,355 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:59,355 INFO  L82        PathProgramCache]: Analyzing trace with hash -960649190, now seen corresponding path program 1 times
[2019-10-13 17:59:59,365 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:59,365 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586213304]
[2019-10-13 17:59:59,366 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:59,366 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:59,366 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:59,580 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:59,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:59,797 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:59:59,798 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586213304]
[2019-10-13 17:59:59,799 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 17:59:59,799 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 17:59:59,800 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829923110]
[2019-10-13 17:59:59,804 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 17:59:59,804 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:59,818 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 17:59:59,819 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 17:59:59,821 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-13 18:00:03,208 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:03,208 INFO  L93              Difference]: Finished difference Result 990 states and 1774 transitions.
[2019-10-13 18:00:03,209 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:03,210 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 15
[2019-10-13 18:00:03,210 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:03,231 INFO  L225             Difference]: With dead ends: 990
[2019-10-13 18:00:03,231 INFO  L226             Difference]: Without dead ends: 629
[2019-10-13 18:00:03,241 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:03,260 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 629 states.
[2019-10-13 18:00:03,339 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625.
[2019-10-13 18:00:03,342 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 625 states.
[2019-10-13 18:00:03,345 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions.
[2019-10-13 18:00:03,347 INFO  L78                 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 15
[2019-10-13 18:00:03,347 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:03,347 INFO  L462      AbstractCegarLoop]: Abstraction has 625 states and 865 transitions.
[2019-10-13 18:00:03,347 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:03,348 INFO  L276                IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions.
[2019-10-13 18:00:03,351 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2019-10-13 18:00:03,351 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:03,352 INFO  L380         BasicCegarLoop]: trace histogram [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]
[2019-10-13 18:00:03,352 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:03,352 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:03,353 INFO  L82        PathProgramCache]: Analyzing trace with hash -1986341175, now seen corresponding path program 1 times
[2019-10-13 18:00:03,353 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:03,353 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647091411]
[2019-10-13 18:00:03,353 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:03,354 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:03,354 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:03,407 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,527 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:03,610 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647091411]
[2019-10-13 18:00:03,611 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190959604]
[2019-10-13 18:00:03,611 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:03,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,695 INFO  L256         TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:03,704 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:03,758 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:03,759 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:03,759 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-13 18:00:03,759 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298827544]
[2019-10-13 18:00:03,761 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:03,761 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:03,762 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:03,762 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:03,762 INFO  L87              Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states.
[2019-10-13 18:00:04,908 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:04,909 INFO  L93              Difference]: Finished difference Result 1826 states and 2564 transitions.
[2019-10-13 18:00:04,909 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:04,909 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 88
[2019-10-13 18:00:04,910 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:04,918 INFO  L225             Difference]: With dead ends: 1826
[2019-10-13 18:00:04,918 INFO  L226             Difference]: Without dead ends: 1207
[2019-10-13 18:00:04,921 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:04,923 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1207 states.
[2019-10-13 18:00:04,971 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197.
[2019-10-13 18:00:04,972 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1197 states.
[2019-10-13 18:00:04,978 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions.
[2019-10-13 18:00:04,978 INFO  L78                 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 88
[2019-10-13 18:00:04,979 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:04,979 INFO  L462      AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions.
[2019-10-13 18:00:04,979 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:04,979 INFO  L276                IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions.
[2019-10-13 18:00:04,983 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2019-10-13 18:00:04,983 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:04,983 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:05,191 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:05,191 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:05,191 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:05,192 INFO  L82        PathProgramCache]: Analyzing trace with hash -1316413698, now seen corresponding path program 1 times
[2019-10-13 18:00:05,192 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:05,192 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511460683]
[2019-10-13 18:00:05,192 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:05,193 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:05,193 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:05,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:05,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:05,311 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:05,351 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:05,351 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511460683]
[2019-10-13 18:00:05,351 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511440181]
[2019-10-13 18:00:05,352 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:05,426 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:05,427 INFO  L256         TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:05,431 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:05,451 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:05,452 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:05,452 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-13 18:00:05,452 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179662390]
[2019-10-13 18:00:05,453 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:05,453 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:05,453 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:05,454 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:05,454 INFO  L87              Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 3 states.
[2019-10-13 18:00:06,603 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:06,604 INFO  L93              Difference]: Finished difference Result 2970 states and 3975 transitions.
[2019-10-13 18:00:06,604 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:06,604 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 89
[2019-10-13 18:00:06,605 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:06,615 INFO  L225             Difference]: With dead ends: 2970
[2019-10-13 18:00:06,615 INFO  L226             Difference]: Without dead ends: 1779
[2019-10-13 18:00:06,619 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:06,621 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1779 states.
[2019-10-13 18:00:06,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1768.
[2019-10-13 18:00:06,673 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1768 states.
[2019-10-13 18:00:06,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 2360 transitions.
[2019-10-13 18:00:06,682 INFO  L78                 Accepts]: Start accepts. Automaton has 1768 states and 2360 transitions. Word has length 89
[2019-10-13 18:00:06,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:06,683 INFO  L462      AbstractCegarLoop]: Abstraction has 1768 states and 2360 transitions.
[2019-10-13 18:00:06,683 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:06,684 INFO  L276                IsEmpty]: Start isEmpty. Operand 1768 states and 2360 transitions.
[2019-10-13 18:00:06,688 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2019-10-13 18:00:06,688 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:06,689 INFO  L380         BasicCegarLoop]: trace histogram [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]
[2019-10-13 18:00:06,893 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:06,893 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:06,894 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:06,894 INFO  L82        PathProgramCache]: Analyzing trace with hash 2070996454, now seen corresponding path program 1 times
[2019-10-13 18:00:06,894 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:06,895 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953379391]
[2019-10-13 18:00:06,895 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:06,895 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:06,896 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:06,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:07,041 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:07,084 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:07,261 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:07,262 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953379391]
[2019-10-13 18:00:07,262 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226461080]
[2019-10-13 18:00:07,262 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:07,332 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:07,333 INFO  L256         TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-13 18:00:07,348 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:07,414 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-13 18:00:07,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:07,462 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:07,462 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12
[2019-10-13 18:00:07,464 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273819408]
[2019-10-13 18:00:07,466 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:07,468 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:07,468 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:07,469 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2019-10-13 18:00:07,470 INFO  L87              Difference]: Start difference. First operand 1768 states and 2360 transitions. Second operand 5 states.
[2019-10-13 18:00:09,059 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:09,059 INFO  L93              Difference]: Finished difference Result 3972 states and 5374 transitions.
[2019-10-13 18:00:09,059 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-13 18:00:09,059 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 109
[2019-10-13 18:00:09,060 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:09,071 INFO  L225             Difference]: With dead ends: 3972
[2019-10-13 18:00:09,072 INFO  L226             Difference]: Without dead ends: 2210
[2019-10-13 18:00:09,076 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210
[2019-10-13 18:00:09,078 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2210 states.
[2019-10-13 18:00:09,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 2009.
[2019-10-13 18:00:09,131 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2009 states.
[2019-10-13 18:00:09,139 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2687 transitions.
[2019-10-13 18:00:09,139 INFO  L78                 Accepts]: Start accepts. Automaton has 2009 states and 2687 transitions. Word has length 109
[2019-10-13 18:00:09,139 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:09,140 INFO  L462      AbstractCegarLoop]: Abstraction has 2009 states and 2687 transitions.
[2019-10-13 18:00:09,140 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:09,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 2009 states and 2687 transitions.
[2019-10-13 18:00:09,142 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 182
[2019-10-13 18:00:09,143 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:09,143 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:09,350 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:09,351 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:09,351 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:09,351 INFO  L82        PathProgramCache]: Analyzing trace with hash -894366490, now seen corresponding path program 1 times
[2019-10-13 18:00:09,352 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:09,352 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392840065]
[2019-10-13 18:00:09,353 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:09,353 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:09,354 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:09,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-13 18:00:09,677 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392840065]
[2019-10-13 18:00:09,677 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079510208]
[2019-10-13 18:00:09,678 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:09,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,760 INFO  L256         TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-13 18:00:09,763 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:09,868 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2019-10-13 18:00:09,869 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:09,869 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-13 18:00:09,869 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318667510]
[2019-10-13 18:00:09,871 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:09,871 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:09,871 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:09,872 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-13 18:00:09,872 INFO  L87              Difference]: Start difference. First operand 2009 states and 2687 transitions. Second operand 5 states.
[2019-10-13 18:00:11,517 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:11,517 INFO  L93              Difference]: Finished difference Result 4281 states and 5805 transitions.
[2019-10-13 18:00:11,520 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:11,520 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 181
[2019-10-13 18:00:11,523 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:11,538 INFO  L225             Difference]: With dead ends: 4281
[2019-10-13 18:00:11,538 INFO  L226             Difference]: Without dead ends: 2278
[2019-10-13 18:00:11,543 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2019-10-13 18:00:11,547 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2278 states.
[2019-10-13 18:00:11,605 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2230.
[2019-10-13 18:00:11,606 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2230 states.
[2019-10-13 18:00:11,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 2851 transitions.
[2019-10-13 18:00:11,617 INFO  L78                 Accepts]: Start accepts. Automaton has 2230 states and 2851 transitions. Word has length 181
[2019-10-13 18:00:11,617 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:11,617 INFO  L462      AbstractCegarLoop]: Abstraction has 2230 states and 2851 transitions.
[2019-10-13 18:00:11,617 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:11,617 INFO  L276                IsEmpty]: Start isEmpty. Operand 2230 states and 2851 transitions.
[2019-10-13 18:00:11,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 226
[2019-10-13 18:00:11,624 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:11,624 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:11,841 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:11,842 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:11,842 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:11,843 INFO  L82        PathProgramCache]: Analyzing trace with hash 1402300876, now seen corresponding path program 1 times
[2019-10-13 18:00:11,843 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:11,843 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780245910]
[2019-10-13 18:00:11,844 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:11,844 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:11,845 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:11,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,217 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,352 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked.
[2019-10-13 18:00:12,353 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780245910]
[2019-10-13 18:00:12,353 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447420397]
[2019-10-13 18:00:12,353 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:12,447 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,448 INFO  L256         TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 18 conjunts are in the unsatisfiable core
[2019-10-13 18:00:12,452 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:12,797 WARN  L191               SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35
[2019-10-13 18:00:12,908 INFO  L134       CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked.
[2019-10-13 18:00:12,908 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:12,908 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12
[2019-10-13 18:00:12,908 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081710623]
[2019-10-13 18:00:12,909 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 12 states
[2019-10-13 18:00:12,910 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:12,910 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2019-10-13 18:00:12,910 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2019-10-13 18:00:12,910 INFO  L87              Difference]: Start difference. First operand 2230 states and 2851 transitions. Second operand 12 states.
[2019-10-13 18:00:18,119 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:18,119 INFO  L93              Difference]: Finished difference Result 7451 states and 10324 transitions.
[2019-10-13 18:00:18,120 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2019-10-13 18:00:18,120 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 225
[2019-10-13 18:00:18,121 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:18,144 INFO  L225             Difference]: With dead ends: 7451
[2019-10-13 18:00:18,145 INFO  L226             Difference]: Without dead ends: 5415
[2019-10-13 18:00:18,151 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420
[2019-10-13 18:00:18,156 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5415 states.
[2019-10-13 18:00:18,282 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 5377.
[2019-10-13 18:00:18,282 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5377 states.
[2019-10-13 18:00:18,295 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7097 transitions.
[2019-10-13 18:00:18,295 INFO  L78                 Accepts]: Start accepts. Automaton has 5377 states and 7097 transitions. Word has length 225
[2019-10-13 18:00:18,296 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:18,296 INFO  L462      AbstractCegarLoop]: Abstraction has 5377 states and 7097 transitions.
[2019-10-13 18:00:18,296 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2019-10-13 18:00:18,296 INFO  L276                IsEmpty]: Start isEmpty. Operand 5377 states and 7097 transitions.
[2019-10-13 18:00:18,305 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 299
[2019-10-13 18:00:18,306 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:18,306 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-13 18:00:18,509 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:18,510 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:18,510 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:18,510 INFO  L82        PathProgramCache]: Analyzing trace with hash 471610887, now seen corresponding path program 1 times
[2019-10-13 18:00:18,511 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:18,511 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678933938]
[2019-10-13 18:00:18,511 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:18,511 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:18,511 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:18,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:18,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:18,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:18,766 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:18,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked.
[2019-10-13 18:00:18,910 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678933938]
[2019-10-13 18:00:18,911 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:18,911 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 18:00:18,911 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594598452]
[2019-10-13 18:00:18,913 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 18:00:18,914 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:18,914 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 18:00:18,914 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-13 18:00:18,914 INFO  L87              Difference]: Start difference. First operand 5377 states and 7097 transitions. Second operand 6 states.
[2019-10-13 18:00:21,115 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:21,115 INFO  L93              Difference]: Finished difference Result 12116 states and 16503 transitions.
[2019-10-13 18:00:21,116 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:21,116 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 298
[2019-10-13 18:00:21,117 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:21,145 INFO  L225             Difference]: With dead ends: 12116
[2019-10-13 18:00:21,145 INFO  L226             Difference]: Without dead ends: 7123
[2019-10-13 18:00:21,160 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:00:21,167 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7123 states.
[2019-10-13 18:00:21,370 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 7096.
[2019-10-13 18:00:21,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7096 states.
[2019-10-13 18:00:21,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 9332 transitions.
[2019-10-13 18:00:21,389 INFO  L78                 Accepts]: Start accepts. Automaton has 7096 states and 9332 transitions. Word has length 298
[2019-10-13 18:00:21,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:21,391 INFO  L462      AbstractCegarLoop]: Abstraction has 7096 states and 9332 transitions.
[2019-10-13 18:00:21,391 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 18:00:21,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 7096 states and 9332 transitions.
[2019-10-13 18:00:21,401 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 307
[2019-10-13 18:00:21,402 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:21,402 INFO  L380         BasicCegarLoop]: trace histogram [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, 2, 2, 2, 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]
[2019-10-13 18:00:21,402 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:21,403 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:21,403 INFO  L82        PathProgramCache]: Analyzing trace with hash -1376271937, now seen corresponding path program 1 times
[2019-10-13 18:00:21,403 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:21,403 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595437910]
[2019-10-13 18:00:21,404 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:21,404 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:21,404 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:21,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 270 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked.
[2019-10-13 18:00:21,708 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595437910]
[2019-10-13 18:00:21,709 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:21,710 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 18:00:21,710 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842968162]
[2019-10-13 18:00:21,711 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 18:00:21,711 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:21,712 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 18:00:21,712 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-13 18:00:21,712 INFO  L87              Difference]: Start difference. First operand 7096 states and 9332 transitions. Second operand 6 states.
[2019-10-13 18:00:25,137 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:25,137 INFO  L93              Difference]: Finished difference Result 19287 states and 26165 transitions.
[2019-10-13 18:00:25,146 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-13 18:00:25,146 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 306
[2019-10-13 18:00:25,147 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:25,197 INFO  L225             Difference]: With dead ends: 19287
[2019-10-13 18:00:25,197 INFO  L226             Difference]: Without dead ends: 11815
[2019-10-13 18:00:25,218 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2019-10-13 18:00:25,231 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11815 states.
[2019-10-13 18:00:25,537 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11815 to 10481.
[2019-10-13 18:00:25,537 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10481 states.
[2019-10-13 18:00:25,560 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 12842 transitions.
[2019-10-13 18:00:25,561 INFO  L78                 Accepts]: Start accepts. Automaton has 10481 states and 12842 transitions. Word has length 306
[2019-10-13 18:00:25,561 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:25,561 INFO  L462      AbstractCegarLoop]: Abstraction has 10481 states and 12842 transitions.
[2019-10-13 18:00:25,561 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 18:00:25,562 INFO  L276                IsEmpty]: Start isEmpty. Operand 10481 states and 12842 transitions.
[2019-10-13 18:00:25,577 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 320
[2019-10-13 18:00:25,577 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:25,578 INFO  L380         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:25,578 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:25,579 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:25,579 INFO  L82        PathProgramCache]: Analyzing trace with hash 854096169, now seen corresponding path program 1 times
[2019-10-13 18:00:25,580 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:25,581 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827129343]
[2019-10-13 18:00:25,581 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:25,581 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:25,581 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:25,658 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,792 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,845 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,925 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:26,095 INFO  L134       CoverageAnalysis]: Checked inductivity of 276 backedges. 176 proven. 97 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-13 18:00:26,096 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827129343]
[2019-10-13 18:00:26,096 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415987872]
[2019-10-13 18:00:26,096 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:26,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:26,217 INFO  L256         TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-13 18:00:26,222 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:26,268 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-13 18:00:26,436 INFO  L134       CoverageAnalysis]: Checked inductivity of 276 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked.
[2019-10-13 18:00:26,436 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:26,436 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16
[2019-10-13 18:00:26,437 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015875910]
[2019-10-13 18:00:26,439 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 16 states
[2019-10-13 18:00:26,439 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:26,439 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2019-10-13 18:00:26,439 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240
[2019-10-13 18:00:26,439 INFO  L87              Difference]: Start difference. First operand 10481 states and 12842 transitions. Second operand 16 states.