./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd6d4490a7412402195d3193de0347508566f7c8 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:52:11,286 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:52:11,288 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:52:11,303 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:52:11,304 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:52:11,306 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:52:11,309 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:52:11,312 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:52:11,316 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:52:11,317 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:52:11,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:52:11,320 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:52:11,321 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:52:11,323 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:52:11,330 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:52:11,332 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:52:11,335 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:52:11,337 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:52:11,341 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:52:11,343 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:52:11,345 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:52:11,347 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:52:11,349 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:52:11,349 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:52:11,349 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:52:11,350 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:52:11,352 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:52:11,352 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:52:11,353 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:52:11,354 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:52:11,355 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:52:11,355 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:52:11,356 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:52:11,356 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:52:11,357 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:52:11,358 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:52:11,359 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:52:11,373 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:52:11,373 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:52:11,374 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:52:11,374 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:52:11,375 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:52:11,376 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:52:11,376 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:52:11,376 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:52:11,376 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:52:11,376 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:52:11,377 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:52:11,379 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:52:11,379 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:52:11,380 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:52:11,380 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:52:11,380 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:52:11,380 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:52:11,380 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:11,380 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:52:11,381 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:52:11,381 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:52:11,382 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:52:11,382 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:52:11,382 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:52:11,382 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd6d4490a7412402195d3193de0347508566f7c8 [2018-11-28 18:52:11,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:52:11,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:52:11,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:52:11,440 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:52:11,441 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:52:11,441 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-28 18:52:11,495 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2be143bcd/df461f7cc13848659f6573835146e669/FLAG0d162ceab [2018-11-28 18:52:11,938 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:52:11,939 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-28 18:52:11,945 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2be143bcd/df461f7cc13848659f6573835146e669/FLAG0d162ceab [2018-11-28 18:52:12,321 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2be143bcd/df461f7cc13848659f6573835146e669 [2018-11-28 18:52:12,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:52:12,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:52:12,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:12,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:52:12,338 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:52:12,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ab1e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12, skipping insertion in model container [2018-11-28 18:52:12,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:52:12,377 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:52:12,621 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:12,629 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:52:12,652 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:12,672 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:52:12,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12 WrapperNode [2018-11-28 18:52:12,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:12,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:12,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:52:12,674 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:52:12,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:12,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:52:12,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:52:12,702 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:52:12,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (1/1) ... [2018-11-28 18:52:12,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:52:12,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:52:12,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:52:12,734 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:52:12,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (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 [2018-11-28 18:52:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:52:12,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:52:12,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:52:12,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:52:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:52:12,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:52:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-28 18:52:12,925 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-28 18:52:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-28 18:52:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-28 18:52:13,331 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:52:13,332 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:52:13,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:13 BoogieIcfgContainer [2018-11-28 18:52:13,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:52:13,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:52:13,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:52:13,346 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:52:13,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:52:12" (1/3) ... [2018-11-28 18:52:13,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757d0b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:13, skipping insertion in model container [2018-11-28 18:52:13,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:12" (2/3) ... [2018-11-28 18:52:13,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757d0b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:13, skipping insertion in model container [2018-11-28 18:52:13,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:13" (3/3) ... [2018-11-28 18:52:13,351 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-28 18:52:13,362 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:52:13,370 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:52:13,389 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:52:13,421 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:52:13,422 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:52:13,422 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:52:13,422 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:52:13,423 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:52:13,423 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:52:13,424 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:52:13,424 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:52:13,424 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:52:13,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 18:52:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:52:13,456 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:13,458 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:13,462 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:13,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-28 18:52:13,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:13,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:13,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:13,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:13,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:13,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:13,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:13,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:13,735 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-28 18:52:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:13,926 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-28 18:52:13,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:13,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:52:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:13,940 INFO L225 Difference]: With dead ends: 44 [2018-11-28 18:52:13,940 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:52:13,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:52:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 18:52:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:52:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 18:52:13,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-28 18:52:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:13,993 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 18:52:13,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 18:52:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:52:13,996 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:13,996 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:13,996 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:13,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-28 18:52:13,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:13,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:13,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:13,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:13,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:14,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:14,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:14,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:14,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:14,078 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-28 18:52:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:14,392 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-28 18:52:14,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:14,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:52:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:14,394 INFO L225 Difference]: With dead ends: 36 [2018-11-28 18:52:14,394 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 18:52:14,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 18:52:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-28 18:52:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:52:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 18:52:14,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-28 18:52:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:14,406 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 18:52:14,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 18:52:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:52:14,411 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:14,411 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:14,412 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:14,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-28 18:52:14,413 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:14,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:14,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:14,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:14,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:14,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:14,602 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:14,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:14,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:14,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:14,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-28 18:52:14,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:52:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:52:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:14,808 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-28 18:52:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:15,553 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-28 18:52:15,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:15,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-28 18:52:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:15,556 INFO L225 Difference]: With dead ends: 58 [2018-11-28 18:52:15,556 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 18:52:15,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 18:52:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-28 18:52:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 18:52:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-28 18:52:15,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-28 18:52:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:15,569 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-28 18:52:15,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:52:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-28 18:52:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:52:15,571 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:15,572 INFO L402 BasicCegarLoop]: trace histogram [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] [2018-11-28 18:52:15,573 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:15,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-28 18:52:15,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:15,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:15,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:15,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:15,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:15,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:15,741 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:15,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:15,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:52:15,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:15,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 18:52:15,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:52:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:52:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:52:15,823 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-28 18:52:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:16,073 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-28 18:52:16,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:52:16,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-28 18:52:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:16,077 INFO L225 Difference]: With dead ends: 43 [2018-11-28 18:52:16,078 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:52:16,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:52:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-28 18:52:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 18:52:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-28 18:52:16,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-28 18:52:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:16,089 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-28 18:52:16,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:52:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-28 18:52:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 18:52:16,091 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:16,092 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 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] [2018-11-28 18:52:16,092 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:16,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-28 18:52:16,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:16,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:16,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:16,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:16,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 18:52:16,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:16,240 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:16,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:16,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:52:16,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:16,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-28 18:52:16,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:16,400 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-28 18:52:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:16,935 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-28 18:52:16,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:16,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-28 18:52:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:16,939 INFO L225 Difference]: With dead ends: 70 [2018-11-28 18:52:16,939 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 18:52:16,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:52:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 18:52:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 18:52:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 18:52:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-28 18:52:16,961 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-28 18:52:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:16,961 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-28 18:52:16,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-28 18:52:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 18:52:16,963 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:16,964 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 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] [2018-11-28 18:52:16,964 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:16,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:16,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-28 18:52:16,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:16,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:16,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:16,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:16,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:52:17,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:17,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:17,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:17,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 18:52:17,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:17,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-28 18:52:17,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:17,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:17,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:17,283 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-28 18:52:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:17,660 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-28 18:52:17,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:17,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-28 18:52:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:17,663 INFO L225 Difference]: With dead ends: 61 [2018-11-28 18:52:17,664 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 18:52:17,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 18:52:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-28 18:52:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-28 18:52:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-28 18:52:17,680 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-28 18:52:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:17,681 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-28 18:52:17,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-28 18:52:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-28 18:52:17,683 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:17,684 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2018-11-28 18:52:17,684 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:17,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:17,685 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-28 18:52:17,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:17,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:17,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:17,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:17,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 18:52:17,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:17,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:17,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:17,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 18:52:17,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:17,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-28 18:52:17,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:52:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:52:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:17,979 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-28 18:52:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:18,246 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-28 18:52:18,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:52:18,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-28 18:52:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:18,250 INFO L225 Difference]: With dead ends: 71 [2018-11-28 18:52:18,250 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 18:52:18,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 18:52:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-28 18:52:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-28 18:52:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-28 18:52:18,268 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-28 18:52:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:18,268 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-28 18:52:18,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:52:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-28 18:52:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-28 18:52:18,272 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:18,273 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 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] [2018-11-28 18:52:18,273 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:18,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-28 18:52:18,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:18,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:18,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:18,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:18,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-28 18:52:18,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:18,593 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:18,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:18,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:18,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:18,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-28 18:52:18,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:18,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-28 18:52:18,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 18:52:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 18:52:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:52:18,845 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-28 18:52:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:19,790 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-28 18:52:19,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 18:52:19,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-28 18:52:19,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:19,798 INFO L225 Difference]: With dead ends: 146 [2018-11-28 18:52:19,799 INFO L226 Difference]: Without dead ends: 103 [2018-11-28 18:52:19,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-28 18:52:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-28 18:52:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-28 18:52:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 18:52:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-28 18:52:19,841 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-28 18:52:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:19,841 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-28 18:52:19,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 18:52:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-28 18:52:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-28 18:52:19,854 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:19,855 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:19,856 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:19,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2012686571, now seen corresponding path program 2 times [2018-11-28 18:52:19,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:19,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:19,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:19,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:19,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 78 proven. 181 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2018-11-28 18:52:20,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:20,161 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:20,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:20,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:20,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:20,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 41 proven. 262 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-11-28 18:52:20,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:20,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-11-28 18:52:20,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 18:52:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 18:52:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:20,868 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-28 18:52:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:22,176 INFO L93 Difference]: Finished difference Result 232 states and 520 transitions. [2018-11-28 18:52:22,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 18:52:22,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 175 [2018-11-28 18:52:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:22,184 INFO L225 Difference]: With dead ends: 232 [2018-11-28 18:52:22,184 INFO L226 Difference]: Without dead ends: 129 [2018-11-28 18:52:22,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 18:52:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-28 18:52:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2018-11-28 18:52:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-28 18:52:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 184 transitions. [2018-11-28 18:52:22,209 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 184 transitions. Word has length 175 [2018-11-28 18:52:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:22,210 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 184 transitions. [2018-11-28 18:52:22,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 18:52:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 184 transitions. [2018-11-28 18:52:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-11-28 18:52:22,215 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:22,215 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 9, 7, 7, 7, 7, 7, 7, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:22,216 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:22,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1129916528, now seen corresponding path program 1 times [2018-11-28 18:52:22,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:22,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:22,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:22,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:22,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 125 proven. 295 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2018-11-28 18:52:22,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:22,476 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:22,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:22,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 79 proven. 457 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 18:52:22,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:22,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2018-11-28 18:52:22,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 18:52:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 18:52:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:22,969 INFO L87 Difference]: Start difference. First operand 118 states and 184 transitions. Second operand 18 states. [2018-11-28 18:52:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:24,226 INFO L93 Difference]: Finished difference Result 290 states and 587 transitions. [2018-11-28 18:52:24,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 18:52:24,227 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 243 [2018-11-28 18:52:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:24,232 INFO L225 Difference]: With dead ends: 290 [2018-11-28 18:52:24,232 INFO L226 Difference]: Without dead ends: 179 [2018-11-28 18:52:24,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 18:52:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-28 18:52:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2018-11-28 18:52:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-28 18:52:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 252 transitions. [2018-11-28 18:52:24,279 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 252 transitions. Word has length 243 [2018-11-28 18:52:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:24,280 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 252 transitions. [2018-11-28 18:52:24,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 18:52:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 252 transitions. [2018-11-28 18:52:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-28 18:52:24,298 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:24,298 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 32, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 15, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:24,298 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:24,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash -719651799, now seen corresponding path program 1 times [2018-11-28 18:52:24,300 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:24,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:24,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:24,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:24,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7283 backedges. 399 proven. 568 refuted. 0 times theorem prover too weak. 6316 trivial. 0 not checked. [2018-11-28 18:52:24,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:24,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:24,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:24,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7283 backedges. 268 proven. 822 refuted. 0 times theorem prover too weak. 6193 trivial. 0 not checked. [2018-11-28 18:52:25,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:25,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-11-28 18:52:25,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 18:52:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 18:52:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:52:25,360 INFO L87 Difference]: Start difference. First operand 154 states and 252 transitions. Second operand 19 states. [2018-11-28 18:52:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:26,556 INFO L93 Difference]: Finished difference Result 415 states and 873 transitions. [2018-11-28 18:52:26,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 18:52:26,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 504 [2018-11-28 18:52:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:26,563 INFO L225 Difference]: With dead ends: 415 [2018-11-28 18:52:26,563 INFO L226 Difference]: Without dead ends: 260 [2018-11-28 18:52:26,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 18:52:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-11-28 18:52:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 201. [2018-11-28 18:52:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-11-28 18:52:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 378 transitions. [2018-11-28 18:52:26,595 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 378 transitions. Word has length 504 [2018-11-28 18:52:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:26,595 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 378 transitions. [2018-11-28 18:52:26,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 18:52:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 378 transitions. [2018-11-28 18:52:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2018-11-28 18:52:26,631 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:26,631 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 54, 54, 48, 47, 32, 32, 32, 32, 32, 32, 32, 27, 27, 27, 27, 27, 27, 27, 20, 18, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:26,631 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:26,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 521845374, now seen corresponding path program 2 times [2018-11-28 18:52:26,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:26,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:26,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:26,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:27,599 WARN L180 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-11-28 18:52:27,940 WARN L180 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-11-28 18:52:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19641 backedges. 1355 proven. 913 refuted. 0 times theorem prover too weak. 17373 trivial. 0 not checked. [2018-11-28 18:52:28,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:28,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:28,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:28,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:28,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:28,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19641 backedges. 469 proven. 1485 refuted. 0 times theorem prover too weak. 17687 trivial. 0 not checked. [2018-11-28 18:52:29,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:29,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 20 [2018-11-28 18:52:29,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 18:52:29,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 18:52:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:52:29,283 INFO L87 Difference]: Start difference. First operand 201 states and 378 transitions. Second operand 20 states. [2018-11-28 18:52:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:30,132 INFO L93 Difference]: Finished difference Result 299 states and 708 transitions. [2018-11-28 18:52:30,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 18:52:30,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 816 [2018-11-28 18:52:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:30,138 INFO L225 Difference]: With dead ends: 299 [2018-11-28 18:52:30,139 INFO L226 Difference]: Without dead ends: 147 [2018-11-28 18:52:30,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2018-11-28 18:52:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-28 18:52:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-11-28 18:52:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-28 18:52:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 213 transitions. [2018-11-28 18:52:30,158 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 213 transitions. Word has length 816 [2018-11-28 18:52:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:30,158 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 213 transitions. [2018-11-28 18:52:30,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 18:52:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 213 transitions. [2018-11-28 18:52:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-11-28 18:52:30,162 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:30,162 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 23, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 11, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:30,162 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:30,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash -431218684, now seen corresponding path program 3 times [2018-11-28 18:52:30,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:30,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:30,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:30,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:30,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 294 proven. 471 refuted. 0 times theorem prover too weak. 3326 trivial. 0 not checked. [2018-11-28 18:52:30,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:30,516 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:30,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:30,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 18:52:30,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:30,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4091 backedges. 683 proven. 21 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2018-11-28 18:52:30,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:30,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2018-11-28 18:52:30,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:30,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:30,840 INFO L87 Difference]: Start difference. First operand 147 states and 213 transitions. Second operand 14 states. [2018-11-28 18:52:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:31,281 INFO L93 Difference]: Finished difference Result 300 states and 449 transitions. [2018-11-28 18:52:31,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 18:52:31,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 380 [2018-11-28 18:52:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:31,285 INFO L225 Difference]: With dead ends: 300 [2018-11-28 18:52:31,285 INFO L226 Difference]: Without dead ends: 162 [2018-11-28 18:52:31,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:52:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-28 18:52:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2018-11-28 18:52:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-28 18:52:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 220 transitions. [2018-11-28 18:52:31,301 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 220 transitions. Word has length 380 [2018-11-28 18:52:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:31,302 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 220 transitions. [2018-11-28 18:52:31,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 220 transitions. [2018-11-28 18:52:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-28 18:52:31,305 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:31,305 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 9, 7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:31,305 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:31,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1495227652, now seen corresponding path program 4 times [2018-11-28 18:52:31,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:31,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:31,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:31,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:31,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 685 proven. 132 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-11-28 18:52:31,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:31,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:31,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:52:31,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:52:31,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:31,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 246 proven. 484 refuted. 0 times theorem prover too weak. 2754 trivial. 0 not checked. [2018-11-28 18:52:33,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:33,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2018-11-28 18:52:33,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 18:52:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 18:52:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2018-11-28 18:52:33,427 INFO L87 Difference]: Start difference. First operand 156 states and 220 transitions. Second operand 22 states. [2018-11-28 18:52:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:34,897 INFO L93 Difference]: Finished difference Result 382 states and 613 transitions. [2018-11-28 18:52:34,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-28 18:52:34,898 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 354 [2018-11-28 18:52:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:34,901 INFO L225 Difference]: With dead ends: 382 [2018-11-28 18:52:34,901 INFO L226 Difference]: Without dead ends: 160 [2018-11-28 18:52:34,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=326, Invalid=1836, Unknown=0, NotChecked=0, Total=2162 [2018-11-28 18:52:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-11-28 18:52:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2018-11-28 18:52:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-28 18:52:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2018-11-28 18:52:34,916 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 354 [2018-11-28 18:52:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:34,917 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2018-11-28 18:52:34,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 18:52:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2018-11-28 18:52:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-11-28 18:52:34,920 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:34,920 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 23, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:34,920 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:34,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:34,921 INFO L82 PathProgramCache]: Analyzing trace with hash 693327765, now seen corresponding path program 5 times [2018-11-28 18:52:34,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:34,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:34,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:34,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:34,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 960 proven. 156 refuted. 0 times theorem prover too weak. 3254 trivial. 0 not checked. [2018-11-28 18:52:35,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:35,467 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:35,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:52:35,605 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-11-28 18:52:35,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:35,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2520 proven. 174 refuted. 0 times theorem prover too weak. 1676 trivial. 0 not checked. [2018-11-28 18:52:35,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:35,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 22 [2018-11-28 18:52:35,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 18:52:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 18:52:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-11-28 18:52:35,834 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand 22 states. [2018-11-28 18:52:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:37,723 INFO L93 Difference]: Finished difference Result 308 states and 418 transitions. [2018-11-28 18:52:37,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 18:52:37,725 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 395 [2018-11-28 18:52:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:37,729 INFO L225 Difference]: With dead ends: 308 [2018-11-28 18:52:37,729 INFO L226 Difference]: Without dead ends: 172 [2018-11-28 18:52:37,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2018-11-28 18:52:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-11-28 18:52:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 155. [2018-11-28 18:52:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-11-28 18:52:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2018-11-28 18:52:37,759 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 395 [2018-11-28 18:52:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:37,760 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2018-11-28 18:52:37,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 18:52:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2018-11-28 18:52:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-11-28 18:52:37,765 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:37,765 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 23, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:37,767 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:37,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:37,767 INFO L82 PathProgramCache]: Analyzing trace with hash 634662915, now seen corresponding path program 6 times [2018-11-28 18:52:37,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:37,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:37,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:37,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 547 proven. 151 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2018-11-28 18:52:38,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:38,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:38,073 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:52:38,157 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-28 18:52:38,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:38,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 603 proven. 95 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2018-11-28 18:52:38,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:38,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-11-28 18:52:38,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:52:38,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:52:38,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:38,388 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand 12 states. [2018-11-28 18:52:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:38,694 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2018-11-28 18:52:38,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 18:52:38,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 395 [2018-11-28 18:52:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:38,698 INFO L225 Difference]: With dead ends: 162 [2018-11-28 18:52:38,698 INFO L226 Difference]: Without dead ends: 155 [2018-11-28 18:52:38,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:52:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-28 18:52:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-11-28 18:52:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-11-28 18:52:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2018-11-28 18:52:38,714 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 395 [2018-11-28 18:52:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:38,715 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2018-11-28 18:52:38,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:52:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2018-11-28 18:52:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-11-28 18:52:38,747 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:38,747 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:38,748 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:38,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:38,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 7 times [2018-11-28 18:52:38,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:38,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:38,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:38,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-28 18:52:40,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:40,356 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:40,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:40,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-28 18:52:42,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:42,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2018-11-28 18:52:42,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-28 18:52:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-28 18:52:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 18:52:42,089 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand 52 states. [2018-11-28 18:52:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:43,603 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2018-11-28 18:52:43,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-28 18:52:43,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2018-11-28 18:52:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:43,606 INFO L225 Difference]: With dead ends: 172 [2018-11-28 18:52:43,607 INFO L226 Difference]: Without dead ends: 136 [2018-11-28 18:52:43,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 514 SyntacticMatches, 35 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 18:52:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-11-28 18:52:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-11-28 18:52:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-28 18:52:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2018-11-28 18:52:43,622 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 463 [2018-11-28 18:52:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:43,623 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2018-11-28 18:52:43,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-28 18:52:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2018-11-28 18:52:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-28 18:52:43,626 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:43,627 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 31, 31, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 13, 11, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:43,627 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:43,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:43,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1112347357, now seen corresponding path program 8 times [2018-11-28 18:52:43,627 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:43,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:43,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:43,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:43,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 314 proven. 1279 refuted. 0 times theorem prover too weak. 6493 trivial. 0 not checked. [2018-11-28 18:52:44,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:44,367 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:44,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:44,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:44,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:44,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 320 proven. 1270 refuted. 0 times theorem prover too weak. 6496 trivial. 0 not checked. [2018-11-28 18:52:44,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:44,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-11-28 18:52:44,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 18:52:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 18:52:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-11-28 18:52:44,947 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand 17 states. [2018-11-28 18:52:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:45,186 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2018-11-28 18:52:45,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 18:52:45,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 531 [2018-11-28 18:52:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:45,189 INFO L225 Difference]: With dead ends: 136 [2018-11-28 18:52:45,189 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:52:45,190 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 535 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2018-11-28 18:52:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:52:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:52:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:52:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:52:45,191 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 531 [2018-11-28 18:52:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:45,191 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:52:45,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 18:52:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:52:45,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:52:45,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:52:45,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,939 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,939 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,957 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,970 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,972 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,975 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,986 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:45,999 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,044 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,047 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,051 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,053 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,076 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,088 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,094 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,099 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,140 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,156 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,157 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,174 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,184 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,204 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,207 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,210 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,211 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,214 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,231 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,251 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,253 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,277 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,277 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,300 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,301 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,321 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,322 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,325 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,334 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,343 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,343 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,361 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,405 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,410 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,412 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,419 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,422 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,433 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,450 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,450 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,467 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,474 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,506 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,510 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,533 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,540 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,545 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,579 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,582 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,587 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,600 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,622 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,633 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,646 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,649 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,650 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,653 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,662 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,663 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:47,441 WARN L180 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 9 [2018-11-28 18:52:47,627 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 1 [2018-11-28 18:52:47,803 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 1 [2018-11-28 18:52:51,991 WARN L180 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2018-11-28 18:52:52,210 WARN L180 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 8 [2018-11-28 18:52:53,205 WARN L180 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2018-11-28 18:52:53,208 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:52:53,208 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:53,208 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:53,208 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:52:53,209 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:52:53,209 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:52:53,209 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-28 18:52:53,209 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-28 18:52:53,209 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-28 18:52:53,209 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-28 18:52:53,209 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-28 18:52:53,209 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-28 18:52:53,210 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= main_~x~0 8)) [2018-11-28 18:52:53,212 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-28 18:52:53,212 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-28 18:52:53,212 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-28 18:52:53,212 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (< 2 |fibo2_#in~n|) (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-28 18:52:53,212 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-28 18:52:53,212 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse6 (<= |fibo2_#in~n| 6)) (.cse0 (<= |fibo2_#in~n| 4)) (.cse5 (<= fibo2_~n |fibo2_#in~n|)) (.cse7 (<= |fibo2_#in~n| fibo2_~n))) (let ((.cse2 (and (<= 5 |fibo2_#in~n|) .cse7 (<= |fibo2_#in~n| 5))) (.cse4 (and (<= 1 |fibo2_#t~ret2|) .cse5 (<= |fibo2_#t~ret2| 1) (<= |fibo2_#in~n| 3) .cse7 (<= 3 |fibo2_#in~n|))) (.cse1 (<= 7 |fibo2_#in~n|)) (.cse8 (and .cse0 (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|))) (.cse3 (and .cse6 (<= 5 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 5) (<= 6 |fibo2_#in~n|)))) (and (or .cse0 .cse1 .cse2 .cse3) (or .cse4 (and .cse5 (<= 4 fibo2_~n))) (or .cse6 (<= 8 |fibo2_#in~n|) (and (<= 8 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 8))) (or (and .cse7 (<= 6 fibo2_~n)) (< |fibo2_#in~n| 4) .cse8 .cse2) (or .cse4 .cse1 .cse8 (and (<= |fibo2_#t~ret2| 3) (<= 3 |fibo2_#t~ret2|)) .cse3)))) [2018-11-28 18:52:53,212 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-28 18:52:53,213 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-28 18:52:53,213 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-28 18:52:53,213 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-28 18:52:53,213 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-28 18:52:53,213 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-28 18:52:53,213 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-28 18:52:53,213 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-28 18:52:53,214 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse7 (<= |fibo1_#in~n| 5)) (.cse5 (<= 5 fibo1_~n)) (.cse4 (<= |fibo1_#in~n| 3))) (let ((.cse0 (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) (<= 3 |fibo1_#in~n|) .cse4)) (.cse1 (and (<= 3 |fibo1_#t~ret0|) .cse7 (<= |fibo1_#t~ret0| 3) .cse5)) (.cse6 (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse7))) (and (or (and (<= 4 fibo1_~n) (<= |fibo1_#in~n| 4)) .cse0 (<= 6 |fibo1_#in~n|) .cse1) (let ((.cse2 (<= fibo1_~n |fibo1_#in~n|)) (.cse3 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse2 .cse3 (<= 9 |fibo1_#in~n|)) (and .cse2 (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|) .cse3) (and .cse2 .cse3 (<= |fibo1_#in~n| 7)))) (or .cse4 .cse5 .cse6) (or .cse0 (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (<= 7 |fibo1_#in~n|) .cse1 .cse6)))) [2018-11-28 18:52:53,214 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-28 18:52:53,214 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-28 18:52:53,214 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-28 18:52:53,214 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-28 18:52:53,214 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-28 18:52:53,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:52:53 BoogieIcfgContainer [2018-11-28 18:52:53,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:52:53,218 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:52:53,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:52:53,218 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:52:53,219 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:13" (3/4) ... [2018-11-28 18:52:53,223 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:52:53,231 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:52:53,231 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:52:53,232 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-28 18:52:53,232 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-28 18:52:53,237 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:52:53,237 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:52:53,237 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:52:53,290 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:52:53,291 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:52:53,291 INFO L168 Benchmark]: Toolchain (without parser) took 40964.53 ms. Allocated memory was 1.0 GB in the beginning and 1.9 GB in the end (delta: 905.4 MB). Free memory was 951.3 MB in the beginning and 972.5 MB in the end (delta: -21.1 MB). Peak memory consumption was 884.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:53,293 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:53,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.11 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:53,294 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.83 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:53,296 INFO L168 Benchmark]: Boogie Preprocessor took 31.95 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:53,296 INFO L168 Benchmark]: RCFGBuilder took 598.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -194.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:53,298 INFO L168 Benchmark]: TraceAbstraction took 39880.48 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 746.1 MB). Free memory was 1.1 GB in the beginning and 972.5 MB in the end (delta: 162.2 MB). Peak memory consumption was 908.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:53,298 INFO L168 Benchmark]: Witness Printer took 72.69 ms. Allocated memory is still 1.9 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:53,303 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 344.11 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.83 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.95 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 598.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -194.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 39880.48 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 746.1 MB). Free memory was 1.1 GB in the beginning and 972.5 MB in the end (delta: 162.2 MB). Peak memory consumption was 908.2 MB. Max. memory is 11.5 GB. * Witness Printer took 72.69 ms. Allocated memory is still 1.9 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 39.8s OverallTime, 18 OverallIterations, 65 TraceHistogramMax, 14.2s AutomataDifference, 0.0s DeadEndRemovalTime, 8.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 611 SDtfs, 956 SDslu, 6012 SDs, 0 SdLazy, 6185 SolverSat, 998 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5022 GetRequests, 4555 SyntacticMatches, 38 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 13.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 185 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 731 PreInvPairs, 1632 NumberOfFragments, 329 HoareAnnotationTreeSize, 731 FomulaSimplifications, 40117 FormulaSimplificationTreeSizeReduction, 1.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 16001 FormulaSimplificationTreeSizeReductionInter, 6.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 9071 NumberOfCodeBlocks, 8408 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 9037 ConstructedInterpolants, 0 QuantifiedInterpolants, 6414967 SizeOfPredicates, 90 NumberOfNonLiveVariables, 8549 ConjunctsInSsa, 451 ConjunctsInUnsatCore, 34 InterpolantComputations, 2 PerfectInterpolantSequences, 106633/120068 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...