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_label16.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:58:44,930 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 21:58:44,933 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-14 21:58:45,016 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
[2019-10-14 21:58:45,038 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:58:45,038 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:58:45,040 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:58:45,041 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:58:45,041 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:58:45,041 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:58:45,041 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:58:45,041 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:58:45,042 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:58:45,042 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:58:45,043 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:58:45,043 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:58:45,043 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:58:45,043 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:58:45,044 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:58:45,044 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:58:45,044 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:58:45,044 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:58:45,044 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:58:45,045 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:58:45,045 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:58:45,045 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:58:45,045 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:58:45,045 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:58:45,046 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:58:45,046 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:58:45,046 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:58:45,046 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:58:45,046 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:58:45,327 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:58:45,340 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:58:45,343 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:58:45,345 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:58:45,345 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:58:45,346 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label16.c
[2019-10-14 21:58:45,424 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319cb7fbd/57b584a9da1f4fd6a0ed242f31540808/FLAGc961c46df
[2019-10-14 21:58:46,076 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:58:46,077 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label16.c
[2019-10-14 21:58:46,104 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319cb7fbd/57b584a9da1f4fd6a0ed242f31540808/FLAGc961c46df
[2019-10-14 21:58:46,242 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319cb7fbd/57b584a9da1f4fd6a0ed242f31540808
[2019-10-14 21:58:46,253 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:58:46,255 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:58:46,256 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:58:46,256 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:58:46,259 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:58:46,261 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:46" (1/1) ...
[2019-10-14 21:58:46,264 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bac9e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:46, skipping insertion in model container
[2019-10-14 21:58:46,264 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:46" (1/1) ...
[2019-10-14 21:58:46,272 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:58:46,335 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:58:47,045 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:58:47,052 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:58:47,222 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:58:47,245 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:58:47,246 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47 WrapperNode
[2019-10-14 21:58:47,247 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:58:47,248 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:58:47,248 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:58:47,249 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:58:47,266 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,266 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,310 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,310 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,384 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,407 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,421 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (1/1) ...
[2019-10-14 21:58:47,433 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:58:47,434 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:58:47,434 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:58:47,435 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:58:47,436 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (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
[2019-10-14 21:58:47,503 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:58:47,503 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:58:47,503 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 21:58:47,504 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:58:47,504 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 21:58:47,504 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:58:47,504 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:58:47,504 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 21:58:47,505 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:58:47,505 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:58:47,505 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:58:49,314 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:58:49,315 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 21:58:49,321 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:49 BoogieIcfgContainer
[2019-10-14 21:58:49,322 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:58:49,324 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:58:49,324 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:58:49,329 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:58:49,330 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:46" (1/3) ...
[2019-10-14 21:58:49,331 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b824e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:49, skipping insertion in model container
[2019-10-14 21:58:49,331 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:47" (2/3) ...
[2019-10-14 21:58:49,332 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b824e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:49, skipping insertion in model container
[2019-10-14 21:58:49,332 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:49" (3/3) ...
[2019-10-14 21:58:49,342 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label16.c
[2019-10-14 21:58:49,354 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:58:49,365 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:58:49,378 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:58:49,424 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:58:49,424 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:58:49,425 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:58:49,425 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:58:49,425 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:58:49,425 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:58:49,426 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:58:49,426 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:58:49,466 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-14 21:58:49,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2019-10-14 21:58:49,477 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:49,478 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:58:49,481 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:49,488 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:49,488 INFO  L82        PathProgramCache]: Analyzing trace with hash -467621694, now seen corresponding path program 1 times
[2019-10-14 21:58:49,499 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:49,499 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559605917]
[2019-10-14 21:58:49,500 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:49,500 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:49,501 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:49,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:49,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:50,014 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:50,014 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559605917]
[2019-10-14 21:58:50,015 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:58:50,016 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:58:50,016 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653863507]
[2019-10-14 21:58:50,021 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:58:50,021 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:50,036 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:58:50,037 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 21:58:50,039 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-14 21:58:53,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:53,444 INFO  L93              Difference]: Finished difference Result 993 states and 1777 transitions.
[2019-10-14 21:58:53,445 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:58:53,447 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 49
[2019-10-14 21:58:53,448 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:53,485 INFO  L225             Difference]: With dead ends: 993
[2019-10-14 21:58:53,486 INFO  L226             Difference]: Without dead ends: 632
[2019-10-14 21:58:53,500 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
[2019-10-14 21:58:53,522 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 632 states.
[2019-10-14 21:58:53,601 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628.
[2019-10-14 21:58:53,602 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 628 states.
[2019-10-14 21:58:53,606 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions.
[2019-10-14 21:58:53,608 INFO  L78                 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 49
[2019-10-14 21:58:53,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:53,609 INFO  L462      AbstractCegarLoop]: Abstraction has 628 states and 886 transitions.
[2019-10-14 21:58:53,609 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:58:53,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions.
[2019-10-14 21:58:53,616 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 130
[2019-10-14 21:58:53,616 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:53,617 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:58:53,617 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:53,618 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:53,618 INFO  L82        PathProgramCache]: Analyzing trace with hash -2099265230, now seen corresponding path program 1 times
[2019-10-14 21:58:53,618 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:53,618 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422026231]
[2019-10-14 21:58:53,619 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:53,619 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:53,619 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:53,678 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,960 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:53,960 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422026231]
[2019-10-14 21:58:53,961 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:58:53,961 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-14 21:58:53,961 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168275609]
[2019-10-14 21:58:53,963 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-14 21:58:53,963 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:53,964 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-14 21:58:53,964 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:58:53,964 INFO  L87              Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states.
[2019-10-14 21:58:56,803 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:56,803 INFO  L93              Difference]: Finished difference Result 1873 states and 2696 transitions.
[2019-10-14 21:58:56,805 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-14 21:58:56,805 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 129
[2019-10-14 21:58:56,806 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:56,814 INFO  L225             Difference]: With dead ends: 1873
[2019-10-14 21:58:56,815 INFO  L226             Difference]: Without dead ends: 1251
[2019-10-14 21:58:56,818 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-14 21:58:56,820 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1251 states.
[2019-10-14 21:58:56,883 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226.
[2019-10-14 21:58:56,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1226 states.
[2019-10-14 21:58:56,889 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions.
[2019-10-14 21:58:56,890 INFO  L78                 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 129
[2019-10-14 21:58:56,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:56,892 INFO  L462      AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions.
[2019-10-14 21:58:56,893 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-14 21:58:56,893 INFO  L276                IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions.
[2019-10-14 21:58:56,904 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 181
[2019-10-14 21:58:56,905 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:56,905 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:58:56,905 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:56,906 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:56,906 INFO  L82        PathProgramCache]: Analyzing trace with hash -2045537286, now seen corresponding path program 1 times
[2019-10-14 21:58:56,906 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:56,907 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294432494]
[2019-10-14 21:58:56,908 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:56,908 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:56,908 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:56,989 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,295 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:57,295 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294432494]
[2019-10-14 21:58:57,296 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614477146]
[2019-10-14 21:58:57,296 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
[2019-10-14 21:58:57,396 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,399 INFO  L256         TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:58:57,417 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:58:57,539 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:57,540 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:58:57,540 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-14 21:58:57,541 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835038918]
[2019-10-14 21:58:57,541 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:58:57,542 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:57,542 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:58:57,542 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:58:57,542 INFO  L87              Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states.
[2019-10-14 21:58:58,650 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:58,650 INFO  L93              Difference]: Finished difference Result 3612 states and 4883 transitions.
[2019-10-14 21:58:58,652 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:58:58,652 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 180
[2019-10-14 21:58:58,653 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:58,666 INFO  L225             Difference]: With dead ends: 3612
[2019-10-14 21:58:58,667 INFO  L226             Difference]: Without dead ends: 2392
[2019-10-14 21:58:58,671 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:58:58,674 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2392 states.
[2019-10-14 21:58:58,753 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189.
[2019-10-14 21:58:58,753 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2189 states.
[2019-10-14 21:58:58,768 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions.
[2019-10-14 21:58:58,768 INFO  L78                 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 180
[2019-10-14 21:58:58,770 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:58,770 INFO  L462      AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions.
[2019-10-14 21:58:58,771 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:58:58,771 INFO  L276                IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions.
[2019-10-14 21:58:58,779 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 216
[2019-10-14 21:58:58,779 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:58,779 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:58:58,994 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:58:58,994 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:58,995 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:58,995 INFO  L82        PathProgramCache]: Analyzing trace with hash -1976797618, now seen corresponding path program 1 times
[2019-10-14 21:58:58,995 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:58,996 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077653687]
[2019-10-14 21:58:58,996 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:58,997 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:58,997 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:59,025 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:59,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:59,177 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:59,293 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:59,401 INFO  L134       CoverageAnalysis]: Checked inductivity of 156 backedges. 84 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 21:58:59,401 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077653687]
[2019-10-14 21:58:59,402 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026473047]
[2019-10-14 21:58:59,402 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
[2019-10-14 21:58:59,526 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:59,528 INFO  L256         TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 21:58:59,546 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:58:59,634 INFO  L134       CoverageAnalysis]: Checked inductivity of 156 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked.
[2019-10-14 21:58:59,635 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:58:59,635 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 21:58:59,636 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689817017]
[2019-10-14 21:58:59,637 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:58:59,637 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:59,637 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:58:59,637 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 21:58:59,638 INFO  L87              Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states.
[2019-10-14 21:59:01,288 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:01,288 INFO  L93              Difference]: Finished difference Result 5406 states and 7546 transitions.
[2019-10-14 21:59:01,290 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:59:01,290 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 215
[2019-10-14 21:59:01,291 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:01,309 INFO  L225             Difference]: With dead ends: 5406
[2019-10-14 21:59:01,309 INFO  L226             Difference]: Without dead ends: 3223
[2019-10-14 21:59:01,316 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2019-10-14 21:59:01,320 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3223 states.
[2019-10-14 21:59:01,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183.
[2019-10-14 21:59:01,394 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3183 states.
[2019-10-14 21:59:01,405 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4269 transitions.
[2019-10-14 21:59:01,405 INFO  L78                 Accepts]: Start accepts. Automaton has 3183 states and 4269 transitions. Word has length 215
[2019-10-14 21:59:01,406 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:01,406 INFO  L462      AbstractCegarLoop]: Abstraction has 3183 states and 4269 transitions.
[2019-10-14 21:59:01,406 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:59:01,406 INFO  L276                IsEmpty]: Start isEmpty. Operand 3183 states and 4269 transitions.
[2019-10-14 21:59:01,411 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 225
[2019-10-14 21:59:01,411 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:01,412 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:01,616 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:01,616 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:01,617 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:01,617 INFO  L82        PathProgramCache]: Analyzing trace with hash 1368554123, now seen corresponding path program 1 times
[2019-10-14 21:59:01,617 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:01,618 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289057631]
[2019-10-14 21:59:01,618 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:01,619 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:01,619 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:01,657 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,715 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,958 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:59:01,958 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289057631]
[2019-10-14 21:59:01,959 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427950110]
[2019-10-14 21:59:01,959 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
[2019-10-14 21:59:02,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:02,075 INFO  L256         TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-14 21:59:02,079 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:02,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:02,142 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:02,142 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9
[2019-10-14 21:59:02,143 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221796030]
[2019-10-14 21:59:02,143 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-14 21:59:02,144 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:02,144 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-14 21:59:02,144 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:59:02,144 INFO  L87              Difference]: Start difference. First operand 3183 states and 4269 transitions. Second operand 9 states.
[2019-10-14 21:59:04,503 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:04,503 INFO  L93              Difference]: Finished difference Result 7976 states and 11384 transitions.
[2019-10-14 21:59:04,504 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-14 21:59:04,504 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 224
[2019-10-14 21:59:04,505 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:04,542 INFO  L225             Difference]: With dead ends: 7976
[2019-10-14 21:59:04,542 INFO  L226             Difference]: Without dead ends: 4987
[2019-10-14 21:59:04,557 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-14 21:59:04,565 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4987 states.
[2019-10-14 21:59:04,696 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4932.
[2019-10-14 21:59:04,696 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4932 states.
[2019-10-14 21:59:04,707 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 6422 transitions.
[2019-10-14 21:59:04,707 INFO  L78                 Accepts]: Start accepts. Automaton has 4932 states and 6422 transitions. Word has length 224
[2019-10-14 21:59:04,708 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:04,708 INFO  L462      AbstractCegarLoop]: Abstraction has 4932 states and 6422 transitions.
[2019-10-14 21:59:04,708 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-14 21:59:04,708 INFO  L276                IsEmpty]: Start isEmpty. Operand 4932 states and 6422 transitions.
[2019-10-14 21:59:04,717 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 295
[2019-10-14 21:59:04,718 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:04,718 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:59:04,921 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:04,922 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:04,922 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:04,922 INFO  L82        PathProgramCache]: Analyzing trace with hash 1712123571, now seen corresponding path program 1 times
[2019-10-14 21:59:04,922 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:04,923 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115458404]
[2019-10-14 21:59:04,923 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:04,923 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:04,923 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:04,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:05,131 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:05,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:05,384 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:05,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 196 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked.
[2019-10-14 21:59:05,549 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115458404]
[2019-10-14 21:59:05,549 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110489069]
[2019-10-14 21:59:05,549 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
[2019-10-14 21:59:05,655 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:05,656 INFO  L256         TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-10-14 21:59:05,660 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:05,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 196 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked.
[2019-10-14 21:59:05,806 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:05,806 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 13
[2019-10-14 21:59:05,806 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221308086]
[2019-10-14 21:59:05,807 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-10-14 21:59:05,807 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:05,807 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-10-14 21:59:05,808 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2019-10-14 21:59:05,808 INFO  L87              Difference]: Start difference. First operand 4932 states and 6422 transitions. Second operand 13 states.
[2019-10-14 21:59:15,306 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:15,307 INFO  L93              Difference]: Finished difference Result 18150 states and 28085 transitions.
[2019-10-14 21:59:15,307 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2019-10-14 21:59:15,308 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 294
[2019-10-14 21:59:15,309 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:15,447 INFO  L225             Difference]: With dead ends: 18150
[2019-10-14 21:59:15,447 INFO  L226             Difference]: Without dead ends: 13412
[2019-10-14 21:59:15,478 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722
[2019-10-14 21:59:15,492 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13412 states.
[2019-10-14 21:59:15,910 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13412 to 12832.
[2019-10-14 21:59:15,910 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12832 states.
[2019-10-14 21:59:15,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12832 states to 12832 states and 16901 transitions.
[2019-10-14 21:59:15,941 INFO  L78                 Accepts]: Start accepts. Automaton has 12832 states and 16901 transitions. Word has length 294
[2019-10-14 21:59:15,942 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:15,942 INFO  L462      AbstractCegarLoop]: Abstraction has 12832 states and 16901 transitions.
[2019-10-14 21:59:15,942 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-10-14 21:59:15,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 12832 states and 16901 transitions.
[2019-10-14 21:59:15,983 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 393
[2019-10-14 21:59:15,983 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:15,984 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:16,189 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:16,190 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:16,191 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:16,191 INFO  L82        PathProgramCache]: Analyzing trace with hash -1754946104, now seen corresponding path program 1 times
[2019-10-14 21:59:16,191 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:16,191 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507849747]
[2019-10-14 21:59:16,192 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:16,192 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:16,192 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:16,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,371 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,414 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 436 backedges. 325 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked.
[2019-10-14 21:59:16,723 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507849747]
[2019-10-14 21:59:16,723 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33840021]
[2019-10-14 21:59:16,723 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
[2019-10-14 21:59:16,842 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,844 INFO  L256         TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:16,855 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:16,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 436 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked.
[2019-10-14 21:59:16,992 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:16,992 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-10-14 21:59:16,992 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303347128]
[2019-10-14 21:59:16,995 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 21:59:16,996 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:16,997 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 21:59:16,997 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 21:59:16,997 INFO  L87              Difference]: Start difference. First operand 12832 states and 16901 transitions. Second operand 11 states.
[2019-10-14 21:59:20,575 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:20,575 INFO  L93              Difference]: Finished difference Result 27792 states and 37246 transitions.
[2019-10-14 21:59:20,576 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2019-10-14 21:59:20,576 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 392
[2019-10-14 21:59:20,576 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:20,636 INFO  L225             Difference]: With dead ends: 27792
[2019-10-14 21:59:20,636 INFO  L226             Difference]: Without dead ends: 16310
[2019-10-14 21:59:20,673 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420
[2019-10-14 21:59:20,693 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16310 states.
[2019-10-14 21:59:21,112 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16310 to 15074.
[2019-10-14 21:59:21,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15074 states.
[2019-10-14 21:59:21,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15074 states to 15074 states and 19664 transitions.
[2019-10-14 21:59:21,143 INFO  L78                 Accepts]: Start accepts. Automaton has 15074 states and 19664 transitions. Word has length 392
[2019-10-14 21:59:21,144 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:21,146 INFO  L462      AbstractCegarLoop]: Abstraction has 15074 states and 19664 transitions.
[2019-10-14 21:59:21,147 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-14 21:59:21,147 INFO  L276                IsEmpty]: Start isEmpty. Operand 15074 states and 19664 transitions.
[2019-10-14 21:59:21,189 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 491
[2019-10-14 21:59:21,189 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:21,189 INFO  L380         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:21,398 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:21,399 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:21,399 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:21,400 INFO  L82        PathProgramCache]: Analyzing trace with hash 1282030757, now seen corresponding path program 1 times
[2019-10-14 21:59:21,401 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:21,401 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963558110]
[2019-10-14 21:59:21,401 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:21,402 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:21,402 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:21,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,775 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:22,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 742 backedges. 182 proven. 4 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked.
[2019-10-14 21:59:22,184 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963558110]
[2019-10-14 21:59:22,187 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557753347]
[2019-10-14 21:59:22,187 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
[2019-10-14 21:59:22,345 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:22,347 INFO  L256         TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-10-14 21:59:22,353 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:22,544 INFO  L134       CoverageAnalysis]: Checked inductivity of 742 backedges. 469 proven. 82 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked.
[2019-10-14 21:59:22,545 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:22,545 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-10-14 21:59:22,545 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822072825]
[2019-10-14 21:59:22,546 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-14 21:59:22,546 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:22,546 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-14 21:59:22,546 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:22,546 INFO  L87              Difference]: Start difference. First operand 15074 states and 19664 transitions. Second operand 7 states.