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/Problem16_label58.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 22:05:11,044 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-14 22:05:11,115 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 22:05:11,133 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 22:05:11,134 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 22:05:11,136 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 22:05:11,136 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 22:05:11,136 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 22:05:11,136 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 22:05:11,136 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 22:05:11,137 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 22:05:11,137 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 22:05:11,137 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 22:05:11,138 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 22:05:11,138 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 22:05:11,138 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 22:05:11,139 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 22:05:11,139 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 22:05:11,139 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 22:05:11,139 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 22:05:11,139 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 22:05:11,140 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 22:05:11,140 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 22:05:11,140 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 22:05:11,140 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:05:11,140 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 22:05:11,141 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 22:05:11,141 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 22:05:11,141 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 22:05:11,141 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 22:05:11,141 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 22:05:11,141 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 22:05:11,419 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 22:05:11,438 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 22:05:11,441 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 22:05:11,442 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 22:05:11,443 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 22:05:11,443 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c
[2019-10-14 22:05:11,510 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3eba1147/9361b1b7f95248a08af2e7cf8f5ce8cb/FLAG9487401e6
[2019-10-14 22:05:12,154 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 22:05:12,155 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c
[2019-10-14 22:05:12,171 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3eba1147/9361b1b7f95248a08af2e7cf8f5ce8cb/FLAG9487401e6
[2019-10-14 22:05:12,378 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3eba1147/9361b1b7f95248a08af2e7cf8f5ce8cb
[2019-10-14 22:05:12,388 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 22:05:12,390 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 22:05:12,391 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 22:05:12,391 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 22:05:12,394 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 22:05:12,395 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,399 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2b11d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12, skipping insertion in model container
[2019-10-14 22:05:12,399 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,408 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 22:05:12,485 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 22:05:13,318 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:05:13,330 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 22:05:13,683 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:05:13,713 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 22:05:13,714 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13 WrapperNode
[2019-10-14 22:05:13,714 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 22:05:13,715 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 22:05:13,715 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 22:05:13,715 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 22:05:13,729 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,730 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,777 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,778 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,842 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,872 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,889 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (1/1) ...
[2019-10-14 22:05:13,905 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 22:05:13,906 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 22:05:13,906 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 22:05:13,906 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 22:05:13,907 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (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 22:05:13,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 22:05:13,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 22:05:13,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 22:05:13,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 22:05:13,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 22:05:13,966 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 22:05:13,966 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 22:05:13,966 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 22:05:13,966 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 22:05:13,966 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 22:05:13,967 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 22:05:13,967 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 22:05:13,967 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 22:05:16,163 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 22:05:16,164 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 22:05:16,171 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:16 BoogieIcfgContainer
[2019-10-14 22:05:16,171 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 22:05:16,172 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 22:05:16,174 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 22:05:16,179 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 22:05:16,180 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:12" (1/3) ...
[2019-10-14 22:05:16,181 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:16, skipping insertion in model container
[2019-10-14 22:05:16,181 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:13" (2/3) ...
[2019-10-14 22:05:16,182 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:16, skipping insertion in model container
[2019-10-14 22:05:16,182 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:16" (3/3) ...
[2019-10-14 22:05:16,185 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem16_label58.c
[2019-10-14 22:05:16,196 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 22:05:16,207 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 22:05:16,218 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 22:05:16,266 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 22:05:16,267 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 22:05:16,267 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 22:05:16,267 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 22:05:16,267 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 22:05:16,268 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 22:05:16,268 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 22:05:16,268 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 22:05:16,309 INFO  L276                IsEmpty]: Start isEmpty. Operand 409 states.
[2019-10-14 22:05:16,319 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2019-10-14 22:05:16,320 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:16,321 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:16,323 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:16,329 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:16,329 INFO  L82        PathProgramCache]: Analyzing trace with hash -129772806, now seen corresponding path program 1 times
[2019-10-14 22:05:16,337 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:16,338 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434491652]
[2019-10-14 22:05:16,338 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:16,338 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:16,339 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:16,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:16,670 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:16,698 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 22:05:16,699 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434491652]
[2019-10-14 22:05:16,700 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:05:16,700 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 22:05:16,700 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935784710]
[2019-10-14 22:05:16,705 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:16,705 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:16,719 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:16,720 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 22:05:16,722 INFO  L87              Difference]: Start difference. First operand 409 states. Second operand 5 states.
[2019-10-14 22:05:21,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:21,479 INFO  L93              Difference]: Finished difference Result 1515 states and 2848 transitions.
[2019-10-14 22:05:21,479 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 22:05:21,480 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 57
[2019-10-14 22:05:21,481 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:21,506 INFO  L225             Difference]: With dead ends: 1515
[2019-10-14 22:05:21,506 INFO  L226             Difference]: Without dead ends: 1038
[2019-10-14 22:05:21,517 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-14 22:05:21,535 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1038 states.
[2019-10-14 22:05:21,619 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031.
[2019-10-14 22:05:21,621 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1031 states.
[2019-10-14 22:05:21,626 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions.
[2019-10-14 22:05:21,628 INFO  L78                 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 57
[2019-10-14 22:05:21,629 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:21,629 INFO  L462      AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions.
[2019-10-14 22:05:21,629 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:21,629 INFO  L276                IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions.
[2019-10-14 22:05:21,645 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 225
[2019-10-14 22:05:21,645 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:21,648 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, 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, 1, 1, 1, 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 22:05:21,649 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:21,649 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:21,649 INFO  L82        PathProgramCache]: Analyzing trace with hash 1170986303, now seen corresponding path program 1 times
[2019-10-14 22:05:21,650 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:21,650 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431070991]
[2019-10-14 22:05:21,650 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:21,651 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:21,651 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:21,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,918 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:22,049 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:22,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 175 backedges. 100 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 22:05:22,148 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431070991]
[2019-10-14 22:05:22,149 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453144384]
[2019-10-14 22:05:22,149 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 22:05:22,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:22,242 INFO  L256         TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:22,254 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:22,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 175 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2019-10-14 22:05:22,409 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:22,409 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9
[2019-10-14 22:05:22,410 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342836843]
[2019-10-14 22:05:22,415 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:22,415 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:22,415 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:22,416 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 22:05:22,416 INFO  L87              Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states.
[2019-10-14 22:05:25,477 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:25,477 INFO  L93              Difference]: Finished difference Result 3131 states and 5147 transitions.
[2019-10-14 22:05:25,478 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-14 22:05:25,479 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 224
[2019-10-14 22:05:25,479 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:25,495 INFO  L225             Difference]: With dead ends: 3131
[2019-10-14 22:05:25,496 INFO  L226             Difference]: Without dead ends: 2106
[2019-10-14 22:05:25,500 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132
[2019-10-14 22:05:25,504 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2106 states.
[2019-10-14 22:05:25,590 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078.
[2019-10-14 22:05:25,590 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2078 states.
[2019-10-14 22:05:25,602 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions.
[2019-10-14 22:05:25,602 INFO  L78                 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 224
[2019-10-14 22:05:25,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:25,606 INFO  L462      AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions.
[2019-10-14 22:05:25,606 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:25,607 INFO  L276                IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions.
[2019-10-14 22:05:25,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 229
[2019-10-14 22:05:25,622 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:25,623 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:25,826 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:25,827 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:25,827 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:25,827 INFO  L82        PathProgramCache]: Analyzing trace with hash 1948862471, now seen corresponding path program 1 times
[2019-10-14 22:05:25,828 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:25,828 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38201058]
[2019-10-14 22:05:25,828 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:25,828 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:25,828 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:25,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,976 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:26,078 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:26,214 INFO  L134       CoverageAnalysis]: Checked inductivity of 179 backedges. 100 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 22:05:26,215 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38201058]
[2019-10-14 22:05:26,215 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247197879]
[2019-10-14 22:05:26,215 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 22:05:26,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:26,300 INFO  L256         TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:26,306 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:26,361 INFO  L134       CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2019-10-14 22:05:26,362 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:26,362 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 22:05:26,362 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760588884]
[2019-10-14 22:05:26,363 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:26,363 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:26,363 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:26,364 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:26,364 INFO  L87              Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states.
[2019-10-14 22:05:28,956 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:28,957 INFO  L93              Difference]: Finished difference Result 6302 states and 10079 transitions.
[2019-10-14 22:05:28,961 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-14 22:05:28,961 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 228
[2019-10-14 22:05:28,962 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:28,987 INFO  L225             Difference]: With dead ends: 6302
[2019-10-14 22:05:28,987 INFO  L226             Difference]: Without dead ends: 4230
[2019-10-14 22:05:28,994 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 228 SyntacticMatches, 1 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 22:05:28,998 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4230 states.
[2019-10-14 22:05:29,105 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208.
[2019-10-14 22:05:29,106 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4208 states.
[2019-10-14 22:05:29,124 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5867 transitions.
[2019-10-14 22:05:29,124 INFO  L78                 Accepts]: Start accepts. Automaton has 4208 states and 5867 transitions. Word has length 228
[2019-10-14 22:05:29,126 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:29,126 INFO  L462      AbstractCegarLoop]: Abstraction has 4208 states and 5867 transitions.
[2019-10-14 22:05:29,126 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:29,126 INFO  L276                IsEmpty]: Start isEmpty. Operand 4208 states and 5867 transitions.
[2019-10-14 22:05:29,134 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 348
[2019-10-14 22:05:29,134 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:29,134 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, 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, 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]
[2019-10-14 22:05:29,339 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:29,339 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:29,340 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:29,340 INFO  L82        PathProgramCache]: Analyzing trace with hash 151732998, now seen corresponding path program 1 times
[2019-10-14 22:05:29,340 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:29,340 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128492564]
[2019-10-14 22:05:29,340 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:29,341 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:29,341 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:29,430 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,531 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,627 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 407 backedges. 231 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked.
[2019-10-14 22:05:29,733 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128492564]
[2019-10-14 22:05:29,733 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032878716]
[2019-10-14 22:05:29,733 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 22:05:29,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,831 INFO  L256         TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:05:29,837 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:30,020 INFO  L134       CoverageAnalysis]: Checked inductivity of 407 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2019-10-14 22:05:30,021 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 22:05:30,021 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11
[2019-10-14 22:05:30,021 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358431544]
[2019-10-14 22:05:30,023 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 22:05:30,023 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:30,023 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 22:05:30,024 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:30,024 INFO  L87              Difference]: Start difference. First operand 4208 states and 5867 transitions. Second operand 11 states.
[2019-10-14 22:05:34,156 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:34,156 INFO  L93              Difference]: Finished difference Result 10864 states and 15765 transitions.
[2019-10-14 22:05:34,161 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-14 22:05:34,162 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 347
[2019-10-14 22:05:34,163 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:34,197 INFO  L225             Difference]: With dead ends: 10864
[2019-10-14 22:05:34,197 INFO  L226             Difference]: Without dead ends: 6662
[2019-10-14 22:05:34,209 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 354 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240
[2019-10-14 22:05:34,215 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6662 states.
[2019-10-14 22:05:34,383 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4591.
[2019-10-14 22:05:34,383 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4591 states.
[2019-10-14 22:05:34,392 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6444 transitions.
[2019-10-14 22:05:34,393 INFO  L78                 Accepts]: Start accepts. Automaton has 4591 states and 6444 transitions. Word has length 347
[2019-10-14 22:05:34,394 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:34,395 INFO  L462      AbstractCegarLoop]: Abstraction has 4591 states and 6444 transitions.
[2019-10-14 22:05:34,395 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-14 22:05:34,395 INFO  L276                IsEmpty]: Start isEmpty. Operand 4591 states and 6444 transitions.
[2019-10-14 22:05:34,405 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 424
[2019-10-14 22:05:34,405 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:34,406 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:34,610 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:34,610 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:34,611 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:34,611 INFO  L82        PathProgramCache]: Analyzing trace with hash -2030428242, now seen corresponding path program 1 times
[2019-10-14 22:05:34,612 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:34,612 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112985490]
[2019-10-14 22:05:34,613 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:34,613 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:34,613 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:34,678 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:34,750 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:34,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:34,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:34,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,214 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 150 proven. 221 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked.
[2019-10-14 22:05:35,215 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112985490]
[2019-10-14 22:05:35,215 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205643793]
[2019-10-14 22:05:35,215 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 22:05:35,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,336 INFO  L256         TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:35,342 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:35,482 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked.
[2019-10-14 22:05:35,483 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:35,483 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 22:05:35,483 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046022605]
[2019-10-14 22:05:35,484 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:35,484 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:35,485 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:35,489 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:35,490 INFO  L87              Difference]: Start difference. First operand 4591 states and 6444 transitions. Second operand 5 states.
[2019-10-14 22:05:38,246 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:38,247 INFO  L93              Difference]: Finished difference Result 10581 states and 14860 transitions.
[2019-10-14 22:05:38,247 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-10-14 22:05:38,247 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 423
[2019-10-14 22:05:38,248 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:38,272 INFO  L225             Difference]: With dead ends: 10581
[2019-10-14 22:05:38,272 INFO  L226             Difference]: Without dead ends: 5996
[2019-10-14 22:05:38,285 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132
[2019-10-14 22:05:38,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5996 states.
[2019-10-14 22:05:38,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5968.
[2019-10-14 22:05:38,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5968 states.
[2019-10-14 22:05:38,427 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7680 transitions.
[2019-10-14 22:05:38,427 INFO  L78                 Accepts]: Start accepts. Automaton has 5968 states and 7680 transitions. Word has length 423
[2019-10-14 22:05:38,428 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:38,435 INFO  L462      AbstractCegarLoop]: Abstraction has 5968 states and 7680 transitions.
[2019-10-14 22:05:38,435 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:38,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 5968 states and 7680 transitions.
[2019-10-14 22:05:38,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 538
[2019-10-14 22:05:38,455 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:38,456 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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:38,668 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:38,669 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:38,669 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:38,669 INFO  L82        PathProgramCache]: Analyzing trace with hash -603942422, now seen corresponding path program 1 times
[2019-10-14 22:05:38,670 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:38,670 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299923949]
[2019-10-14 22:05:38,670 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:38,670 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:38,670 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:38,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:38,837 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:38,876 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,175 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 266 proven. 114 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked.
[2019-10-14 22:05:39,532 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299923949]
[2019-10-14 22:05:39,533 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55007186]
[2019-10-14 22:05:39,533 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 22:05:39,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,756 INFO  L256         TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:05:39,766 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:40,165 INFO  L134       CoverageAnalysis]: Checked inductivity of 496 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2019-10-14 22:05:40,166 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 22:05:40,166 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-10-14 22:05:40,166 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011024229]
[2019-10-14 22:05:40,169 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 22:05:40,169 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:40,169 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 22:05:40,169 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:40,170 INFO  L87              Difference]: Start difference. First operand 5968 states and 7680 transitions. Second operand 11 states.
[2019-10-14 22:05:47,819 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:47,820 INFO  L93              Difference]: Finished difference Result 17246 states and 24015 transitions.
[2019-10-14 22:05:47,821 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2019-10-14 22:05:47,821 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 537
[2019-10-14 22:05:47,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:47,884 INFO  L225             Difference]: With dead ends: 17246
[2019-10-14 22:05:47,885 INFO  L226             Difference]: Without dead ends: 11284
[2019-10-14 22:05:47,899 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 551 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462
[2019-10-14 22:05:47,909 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11284 states.
[2019-10-14 22:05:48,164 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11284 to 10903.
[2019-10-14 22:05:48,164 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10903 states.
[2019-10-14 22:05:48,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10903 states to 10903 states and 14268 transitions.
[2019-10-14 22:05:48,201 INFO  L78                 Accepts]: Start accepts. Automaton has 10903 states and 14268 transitions. Word has length 537
[2019-10-14 22:05:48,202 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:48,202 INFO  L462      AbstractCegarLoop]: Abstraction has 10903 states and 14268 transitions.
[2019-10-14 22:05:48,202 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-14 22:05:48,203 INFO  L276                IsEmpty]: Start isEmpty. Operand 10903 states and 14268 transitions.
[2019-10-14 22:05:48,259 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 779
[2019-10-14 22:05:48,260 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:48,260 INFO  L380         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:48,472 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:48,473 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:48,473 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:48,473 INFO  L82        PathProgramCache]: Analyzing trace with hash -2137819985, now seen corresponding path program 1 times
[2019-10-14 22:05:48,474 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:48,474 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740454340]
[2019-10-14 22:05:48,474 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:48,474 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:48,475 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:48,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:48,622 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:48,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:48,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:48,774 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:48,919 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:48,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:49,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 1306 backedges. 479 proven. 254 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked.
[2019-10-14 22:05:49,548 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740454340]
[2019-10-14 22:05:49,548 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583039737]
[2019-10-14 22:05:49,549 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 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 22:05:49,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:49,733 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:05:49,742 INFO  L279         TraceCheckSpWp]: Computing forward predicates...