./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_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/Fibonacci02_true-unreach-call_true-no-overflow_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 7e40a98558d0111ea95f3ee60a44cc14c7768182 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:49:51,641 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:49:51,643 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:49:51,655 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:49:51,655 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:49:51,656 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:49:51,657 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:49:51,659 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:49:51,661 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:49:51,662 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:49:51,663 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:49:51,663 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:49:51,664 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:49:51,665 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:49:51,667 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:49:51,667 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:49:51,668 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:49:51,670 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:49:51,673 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:49:51,674 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:49:51,675 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:49:51,676 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:49:51,679 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:49:51,679 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:49:51,680 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:49:51,682 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:49:51,684 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:49:51,684 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:49:51,688 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:49:51,689 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:49:51,690 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:49:51,690 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:49:51,690 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:49:51,691 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:49:51,692 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:49:51,693 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:49:51,693 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:49:51,709 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:49:51,709 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:49:51,710 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:49:51,710 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:49:51,710 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:49:51,711 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:49:51,711 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:49:51,712 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:49:51,712 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:49:51,712 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:49:51,712 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:49:51,712 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:49:51,713 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:49:51,713 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:49:51,713 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:49:51,713 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:49:51,713 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:49:51,713 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:49:51,715 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:49:51,715 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:49:51,715 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:49:51,716 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:49:51,716 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:49:51,716 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:49:51,716 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:49:51,716 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:49:51,716 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:49:51,717 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:49:51,718 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:49:51,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:49:51,718 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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-28 18:49:51,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:49:51,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:49:51,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:49:51,784 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:49:51,785 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:49:51,785 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 18:49:51,861 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a030c781/5264e8e106b5437e950106894d251880/FLAG910e8e6d3 [2018-11-28 18:49:52,360 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:49:52,361 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 18:49:52,368 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a030c781/5264e8e106b5437e950106894d251880/FLAG910e8e6d3 [2018-11-28 18:49:52,712 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a030c781/5264e8e106b5437e950106894d251880 [2018-11-28 18:49:52,715 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:49:52,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:49:52,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:49:52,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:49:52,721 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:49:52,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:52,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef72e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52, skipping insertion in model container [2018-11-28 18:49:52,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:52,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:49:52,758 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:49:52,949 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:49:52,956 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:49:52,977 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:49:52,996 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:49:52,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52 WrapperNode [2018-11-28 18:49:52,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:49:52,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:49:52,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:49:52,998 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:49:53,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:49:53,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:49:53,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:49:53,030 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:49:53,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:53,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:49:53,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:49:53,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:49:53,060 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:49:53,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (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 18:49:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-28 18:49:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-28 18:49:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:49:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:49:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:49:53,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:49:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:49:53,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:49:53,418 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:49:53,419 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:49:53,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:49:53 BoogieIcfgContainer [2018-11-28 18:49:53,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:49:53,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:49:53,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:49:53,425 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:49:53,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:49:52" (1/3) ... [2018-11-28 18:49:53,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8f75f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:49:53, skipping insertion in model container [2018-11-28 18:49:53,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52" (2/3) ... [2018-11-28 18:49:53,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8f75f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:49:53, skipping insertion in model container [2018-11-28 18:49:53,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:49:53" (3/3) ... [2018-11-28 18:49:53,432 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 18:49:53,458 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:49:53,475 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:49:53,521 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:49:53,558 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:49:53,558 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:49:53,559 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:49:53,559 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:49:53,559 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:49:53,559 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:49:53,559 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:49:53,559 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:49:53,559 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:49:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-28 18:49:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:49:53,584 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:53,585 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:53,588 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:53,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-11-28 18:49:53,596 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:53,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:53,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:53,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:53,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:53,814 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 18:49:53,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:49:53,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:49:53,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:49:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:49:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:49:53,838 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-28 18:49:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:53,987 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-11-28 18:49:53,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:49:53,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:49:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:54,000 INFO L225 Difference]: With dead ends: 33 [2018-11-28 18:49:54,000 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:49:54,003 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 18:49:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:49:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:49:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:49:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:49:54,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 18:49:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:54,046 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:49:54,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:49:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:49:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:49:54,048 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:54,048 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:54,049 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:54,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-11-28 18:49:54,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:54,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,154 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 18:49:54,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:49:54,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:49:54,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:49:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:49:54,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:49:54,158 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 18:49:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:54,414 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 18:49:54,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:49:54,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:49:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:54,420 INFO L225 Difference]: With dead ends: 27 [2018-11-28 18:49:54,420 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:49:54,422 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 18:49:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:49:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 18:49:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:49:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:49:54,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 18:49:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:54,438 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:49:54,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:49:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:49:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:49:54,441 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:54,441 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:54,442 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:54,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-11-28 18:49:54,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:54,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:54,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:54,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:49:54,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:54,645 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 18:49:54,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:49:54,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:54,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 18:49:54,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:49:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:49:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:49:54,812 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 18:49:55,017 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-11-28 18:49:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:55,176 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 18:49:55,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:49:55,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 18:49:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:55,180 INFO L225 Difference]: With dead ends: 38 [2018-11-28 18:49:55,180 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:49:55,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:49:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:49:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 18:49:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:49:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 18:49:55,190 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 18:49:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:55,191 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 18:49:55,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:49:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 18:49:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:49:55,193 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:55,193 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:55,193 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:55,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2018-11-28 18:49:55,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:55,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:55,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:55,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:49:55,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:55,392 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 18:49:55,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:55,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:49:55,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:55,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:49:55,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:49:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:49:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:49:55,488 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 18:49:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:55,757 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 18:49:55,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:49:55,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 18:49:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:55,759 INFO L225 Difference]: With dead ends: 32 [2018-11-28 18:49:55,760 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 18:49:55,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:49:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 18:49:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 18:49:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 18:49:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 18:49:55,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 18:49:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:55,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 18:49:55,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:49:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 18:49:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 18:49:55,781 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:55,781 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:55,781 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:55,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2018-11-28 18:49:55,782 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:55,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:55,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:55,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:55,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 18:49:55,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:55,965 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 18:49:55,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:49:56,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:49:56,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:56,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 18:49:56,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:56,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 18:49:56,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:49:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:49:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:49:56,108 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 18:49:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:56,364 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 18:49:56,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:49:56,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 18:49:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:56,367 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:49:56,368 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:49:56,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:49:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:49:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 18:49:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:49:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 18:49:56,385 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 18:49:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:56,388 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 18:49:56,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:49:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 18:49:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 18:49:56,392 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:56,392 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 8, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:56,393 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:56,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash 696026233, now seen corresponding path program 3 times [2018-11-28 18:49:56,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:56,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:56,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:56,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:56,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 110 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-11-28 18:49:56,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:56,820 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 18:49:56,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:49:56,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 18:49:56,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:56,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-11-28 18:49:57,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:57,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-28 18:49:57,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:49:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:49:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:49:57,005 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 11 states. [2018-11-28 18:49:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:57,363 INFO L93 Difference]: Finished difference Result 65 states and 113 transitions. [2018-11-28 18:49:57,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:49:57,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2018-11-28 18:49:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:57,366 INFO L225 Difference]: With dead ends: 65 [2018-11-28 18:49:57,367 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 18:49:57,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:49:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 18:49:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-11-28 18:49:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 18:49:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2018-11-28 18:49:57,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 81 [2018-11-28 18:49:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:57,381 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2018-11-28 18:49:57,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:49:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2018-11-28 18:49:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 18:49:57,383 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:57,385 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:57,385 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:57,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 4 times [2018-11-28 18:49:57,385 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:57,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:57,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:57,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:57,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 18:49:57,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:57,634 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 18:49:57,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:49:57,673 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:49:57,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:57,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-28 18:49:57,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:57,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-11-28 18:49:57,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:49:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:49:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:49:57,880 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 15 states. [2018-11-28 18:49:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:58,717 INFO L93 Difference]: Finished difference Result 83 states and 141 transitions. [2018-11-28 18:49:58,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 18:49:58,718 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2018-11-28 18:49:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:58,721 INFO L225 Difference]: With dead ends: 83 [2018-11-28 18:49:58,721 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 18:49:58,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-11-28 18:49:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 18:49:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-28 18:49:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 18:49:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-11-28 18:49:58,737 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 96 [2018-11-28 18:49:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:58,738 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-11-28 18:49:58,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:49:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2018-11-28 18:49:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:49:58,740 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:58,740 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:58,742 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:58,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2018-11-28 18:49:58,742 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:58,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:58,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:58,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:58,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-28 18:49:58,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:58,861 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 18:49:58,873 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:49:58,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-28 18:49:58,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:58,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-11-28 18:49:59,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:59,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-11-28 18:49:59,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:49:59,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:49:59,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:49:59,027 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 9 states. [2018-11-28 18:49:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:59,185 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2018-11-28 18:49:59,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:49:59,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-11-28 18:49:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:59,189 INFO L225 Difference]: With dead ends: 63 [2018-11-28 18:49:59,189 INFO L226 Difference]: Without dead ends: 59 [2018-11-28 18:49:59,190 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:49:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-28 18:49:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-28 18:49:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-28 18:49:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2018-11-28 18:49:59,201 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 109 [2018-11-28 18:49:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:59,201 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2018-11-28 18:49:59,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:49:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2018-11-28 18:49:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-28 18:49:59,205 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:59,205 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:59,205 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:59,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1510121204, now seen corresponding path program 6 times [2018-11-28 18:49:59,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:59,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:59,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-11-28 18:49:59,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:59,654 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 18:49:59,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:49:59,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-28 18:49:59,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:59,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 433 proven. 94 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-11-28 18:49:59,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:59,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 18:49:59,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:49:59,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:49:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:49:59,841 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 9 states. [2018-11-28 18:50:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:00,019 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2018-11-28 18:50:00,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:50:00,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 204 [2018-11-28 18:50:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:00,024 INFO L225 Difference]: With dead ends: 66 [2018-11-28 18:50:00,024 INFO L226 Difference]: Without dead ends: 62 [2018-11-28 18:50:00,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:50:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-28 18:50:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2018-11-28 18:50:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-28 18:50:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2018-11-28 18:50:00,034 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 204 [2018-11-28 18:50:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:00,035 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2018-11-28 18:50:00,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:50:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2018-11-28 18:50:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-28 18:50:00,039 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:00,039 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:00,039 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:00,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1009195755, now seen corresponding path program 7 times [2018-11-28 18:50:00,040 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:00,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:00,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:00,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:00,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-11-28 18:50:00,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:00,206 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 18:50:00,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:00,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2018-11-28 18:50:00,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:00,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2018-11-28 18:50:00,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 18:50:00,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 18:50:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:50:00,480 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 10 states. [2018-11-28 18:50:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:01,327 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2018-11-28 18:50:01,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:50:01,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 218 [2018-11-28 18:50:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:01,330 INFO L225 Difference]: With dead ends: 71 [2018-11-28 18:50:01,333 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 18:50:01,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:50:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 18:50:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-28 18:50:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 18:50:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2018-11-28 18:50:01,354 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 218 [2018-11-28 18:50:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:01,356 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2018-11-28 18:50:01,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 18:50:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2018-11-28 18:50:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-11-28 18:50:01,363 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:01,363 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:01,363 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:01,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1795105459, now seen corresponding path program 8 times [2018-11-28 18:50:01,365 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:01,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:01,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:01,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:01,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 238 proven. 1112 refuted. 0 times theorem prover too weak. 4689 trivial. 0 not checked. [2018-11-28 18:50:01,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:01,587 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 18:50:01,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:50:01,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:50:01,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:01,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 204 proven. 1348 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2018-11-28 18:50:01,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:01,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2018-11-28 18:50:01,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:50:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:50:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:50:01,836 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 11 states. [2018-11-28 18:50:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:02,144 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2018-11-28 18:50:02,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:50:02,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2018-11-28 18:50:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:02,149 INFO L225 Difference]: With dead ends: 73 [2018-11-28 18:50:02,149 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 18:50:02,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:50:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 18:50:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-28 18:50:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 18:50:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 104 transitions. [2018-11-28 18:50:02,160 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 104 transitions. Word has length 327 [2018-11-28 18:50:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:02,161 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 104 transitions. [2018-11-28 18:50:02,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:50:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 104 transitions. [2018-11-28 18:50:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-11-28 18:50:02,177 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:02,177 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 74, 46, 46, 46, 46, 46, 46, 46, 28, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:02,178 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:02,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1009449410, now seen corresponding path program 9 times [2018-11-28 18:50:02,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:02,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:02,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:02,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:02,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23953 backedges. 1274 proven. 2184 refuted. 0 times theorem prover too weak. 20495 trivial. 0 not checked. [2018-11-28 18:50:02,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:02,766 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 18:50:02,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:50:02,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-28 18:50:02,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:02,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23953 backedges. 2867 proven. 73 refuted. 0 times theorem prover too weak. 21013 trivial. 0 not checked. [2018-11-28 18:50:03,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:03,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2018-11-28 18:50:03,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:50:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:50:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:50:03,218 INFO L87 Difference]: Start difference. First operand 69 states and 104 transitions. Second operand 14 states. [2018-11-28 18:50:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:03,843 INFO L93 Difference]: Finished difference Result 136 states and 245 transitions. [2018-11-28 18:50:03,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:50:03,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 639 [2018-11-28 18:50:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:03,846 INFO L225 Difference]: With dead ends: 136 [2018-11-28 18:50:03,846 INFO L226 Difference]: Without dead ends: 76 [2018-11-28 18:50:03,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-11-28 18:50:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-28 18:50:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-11-28 18:50:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-28 18:50:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 110 transitions. [2018-11-28 18:50:03,862 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 110 transitions. Word has length 639 [2018-11-28 18:50:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:03,863 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 110 transitions. [2018-11-28 18:50:03,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:50:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 110 transitions. [2018-11-28 18:50:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2018-11-28 18:50:03,871 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:03,871 INFO L402 BasicCegarLoop]: trace histogram [105, 105, 84, 52, 52, 52, 52, 52, 52, 52, 32, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:03,872 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:03,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2060986062, now seen corresponding path program 10 times [2018-11-28 18:50:03,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:03,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:03,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:03,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:03,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30630 backedges. 886 proven. 3676 refuted. 0 times theorem prover too weak. 26068 trivial. 0 not checked. [2018-11-28 18:50:04,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:04,953 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 18:50:04,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:50:05,134 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:50:05,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:05,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30630 backedges. 603 proven. 3712 refuted. 0 times theorem prover too weak. 26315 trivial. 0 not checked. [2018-11-28 18:50:06,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:06,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2018-11-28 18:50:06,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 18:50:06,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 18:50:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:50:06,311 INFO L87 Difference]: Start difference. First operand 73 states and 110 transitions. Second operand 20 states. [2018-11-28 18:50:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:07,988 INFO L93 Difference]: Finished difference Result 192 states and 370 transitions. [2018-11-28 18:50:07,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-28 18:50:07,989 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 721 [2018-11-28 18:50:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:07,994 INFO L225 Difference]: With dead ends: 192 [2018-11-28 18:50:07,994 INFO L226 Difference]: Without dead ends: 129 [2018-11-28 18:50:07,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=630, Invalid=1920, Unknown=0, NotChecked=0, Total=2550 [2018-11-28 18:50:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-28 18:50:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2018-11-28 18:50:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-11-28 18:50:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 175 transitions. [2018-11-28 18:50:08,016 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 175 transitions. Word has length 721 [2018-11-28 18:50:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:08,018 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 175 transitions. [2018-11-28 18:50:08,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 18:50:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 175 transitions. [2018-11-28 18:50:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2018-11-28 18:50:08,026 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:08,026 INFO L402 BasicCegarLoop]: trace histogram [131, 131, 106, 65, 65, 65, 65, 65, 65, 65, 41, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:08,026 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:08,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1889376797, now seen corresponding path program 11 times [2018-11-28 18:50:08,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:08,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:08,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:08,819 WARN L180 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-11-28 18:50:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 47945 backedges. 3566 proven. 2155 refuted. 0 times theorem prover too weak. 42224 trivial. 0 not checked. [2018-11-28 18:50:09,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:09,164 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 18:50:09,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:50:09,803 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) [2018-11-28 18:50:09,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:09,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 47945 backedges. 5079 proven. 5191 refuted. 0 times theorem prover too weak. 37675 trivial. 0 not checked. [2018-11-28 18:50:11,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:11,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 25 [2018-11-28 18:50:11,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 18:50:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 18:50:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2018-11-28 18:50:11,753 INFO L87 Difference]: Start difference. First operand 119 states and 175 transitions. Second operand 25 states. [2018-11-28 18:50:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:15,077 INFO L93 Difference]: Finished difference Result 324 states and 675 transitions. [2018-11-28 18:50:15,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-28 18:50:15,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 899 [2018-11-28 18:50:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:15,088 INFO L225 Difference]: With dead ends: 324 [2018-11-28 18:50:15,089 INFO L226 Difference]: Without dead ends: 182 [2018-11-28 18:50:15,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1045, Invalid=4211, Unknown=0, NotChecked=0, Total=5256 [2018-11-28 18:50:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-28 18:50:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2018-11-28 18:50:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-28 18:50:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2018-11-28 18:50:15,131 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 899 [2018-11-28 18:50:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:15,134 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2018-11-28 18:50:15,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 18:50:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2018-11-28 18:50:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2018-11-28 18:50:15,142 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:15,142 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:15,143 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:15,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 12 times [2018-11-28 18:50:15,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:15,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:15,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:15,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:15,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-28 18:50:16,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:16,838 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 18:50:16,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:50:17,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 93 check-sat command(s) [2018-11-28 18:50:17,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:17,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-28 18:50:18,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:18,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-28 18:50:18,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 18:50:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 18:50:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 18:50:18,939 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand 36 states. [2018-11-28 18:50:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:19,673 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2018-11-28 18:50:19,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 18:50:19,674 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2018-11-28 18:50:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:19,679 INFO L225 Difference]: With dead ends: 148 [2018-11-28 18:50:19,679 INFO L226 Difference]: Without dead ends: 144 [2018-11-28 18:50:19,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 880 SyntacticMatches, 55 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 18:50:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-28 18:50:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-11-28 18:50:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-28 18:50:19,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2018-11-28 18:50:19,694 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 749 [2018-11-28 18:50:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:19,694 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2018-11-28 18:50:19,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 18:50:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2018-11-28 18:50:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2018-11-28 18:50:19,704 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:19,705 INFO L402 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:19,705 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:19,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:19,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1106954389, now seen corresponding path program 13 times [2018-11-28 18:50:19,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:19,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:19,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:19,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:19,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 1193 proven. 5401 refuted. 0 times theorem prover too weak. 44316 trivial. 0 not checked. [2018-11-28 18:50:20,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:20,588 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 18:50:20,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:20,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 1209 proven. 5377 refuted. 0 times theorem prover too weak. 44324 trivial. 0 not checked. [2018-11-28 18:50:21,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:21,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-11-28 18:50:21,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 18:50:21,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 18:50:21,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2018-11-28 18:50:21,724 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand 17 states. [2018-11-28 18:50:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:21,992 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2018-11-28 18:50:21,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 18:50:21,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 926 [2018-11-28 18:50:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:21,995 INFO L225 Difference]: With dead ends: 146 [2018-11-28 18:50:21,995 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:50:21,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2018-11-28 18:50:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:50:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:50:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:50:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:50:21,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 926 [2018-11-28 18:50:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:21,998 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:50:21,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 18:50:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:50:21,998 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:50:22,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:50:22,988 WARN L180 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 8 [2018-11-28 18:50:26,698 WARN L180 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 144 DAG size of output: 65 [2018-11-28 18:50:26,701 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-28 18:50:26,702 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-28 18:50:26,702 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-28 18:50:26,702 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-28 18:50:26,702 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (or (and (<= |fibonacci_#t~ret0| 8) (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7)) (and (<= |fibonacci_#t~ret0| 21) (<= 21 |fibonacci_#t~ret0|) (<= 9 |fibonacci_#in~n|)) (and (<= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 8) (<= 8 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 13)) (<= 10 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 6)) (or (or (< 4 |fibonacci_#in~n|) (< |fibonacci_#in~n| 4)) (and (<= |fibonacci_#t~ret0| 2) (<= 2 |fibonacci_#t~ret0|))) (or (and (<= 5 |fibonacci_#t~ret0|) (<= 6 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 5)) (and (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 3) (<= fibonacci_~n 5)) (< |fibonacci_#in~n| 5) (<= 7 |fibonacci_#in~n|)) (let ((.cse1 (<= |fibonacci_#t~ret0| 1)) (.cse2 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#in~n| fibonacci_~n) .cse0) (and .cse1 (<= |fibonacci_#in~n| 3) .cse2 (<= 3 fibonacci_~n) .cse0) (and .cse1 .cse2 (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse0)))) [2018-11-28 18:50:26,702 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-28 18:50:26,703 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-28 18:50:26,703 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-28 18:50:26,703 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-28 18:50:26,703 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:50:26,703 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:50:26,703 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:50:26,703 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:50:26,703 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:50:26,703 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:50:26,704 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2018-11-28 18:50:26,704 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-28 18:50:26,704 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-28 18:50:26,704 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-28 18:50:26,704 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-28 18:50:26,704 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-11-28 18:50:26,704 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-28 18:50:26,704 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-28 18:50:26,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:50:26 BoogieIcfgContainer [2018-11-28 18:50:26,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:50:26,713 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:50:26,713 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:50:26,713 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:50:26,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:49:53" (3/4) ... [2018-11-28 18:50:26,721 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:50:26,727 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-28 18:50:26,728 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:50:26,728 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:50:26,733 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:50:26,733 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:50:26,733 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:50:26,777 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:50:26,778 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:50:26,778 INFO L168 Benchmark]: Toolchain (without parser) took 34063.08 ms. Allocated memory was 1.0 GB in the beginning and 2.2 GB in the end (delta: 1.2 GB). Free memory was 944.6 MB in the beginning and 1.7 GB in the end (delta: -749.8 MB). Peak memory consumption was 410.4 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:26,779 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:26,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.14 ms. Allocated memory is still 1.0 GB. Free memory was 944.6 MB in the beginning and 933.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:26,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.89 ms. Allocated memory is still 1.0 GB. Free memory is still 933.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:26,782 INFO L168 Benchmark]: Boogie Preprocessor took 28.86 ms. Allocated memory is still 1.0 GB. Free memory is still 933.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:26,783 INFO L168 Benchmark]: RCFGBuilder took 360.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 933.9 MB in the beginning and 1.1 GB in the end (delta: -180.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:26,784 INFO L168 Benchmark]: TraceAbstraction took 33292.58 ms. Allocated memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: 1.0 GB). Free memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: -579.9 MB). Peak memory consumption was 444.1 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:26,785 INFO L168 Benchmark]: Witness Printer took 64.63 ms. Allocated memory is still 2.2 GB. Free memory is still 1.7 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:26,790 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.14 ms. Allocated memory is still 1.0 GB. Free memory was 944.6 MB in the beginning and 933.9 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 31.89 ms. Allocated memory is still 1.0 GB. Free memory is still 933.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.86 ms. Allocated memory is still 1.0 GB. Free memory is still 933.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 360.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 933.9 MB in the beginning and 1.1 GB in the end (delta: -180.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 33292.58 ms. Allocated memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: 1.0 GB). Free memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: -579.9 MB). Peak memory consumption was 444.1 MB. Max. memory is 11.5 GB. * Witness Printer took 64.63 ms. Allocated memory is still 2.2 GB. Free memory is still 1.7 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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 4 procedures, 23 locations, 1 error locations. SAFE Result, 33.1s OverallTime, 16 OverallIterations, 135 TraceHistogramMax, 10.7s AutomataDifference, 0.0s DeadEndRemovalTime, 4.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 388 SDtfs, 922 SDslu, 2272 SDs, 0 SdLazy, 3159 SolverSat, 1085 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5597 GetRequests, 5216 SyntacticMatches, 57 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 11.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=15, 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: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 75 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 254 PreInvPairs, 433 NumberOfFragments, 152 HoareAnnotationTreeSize, 254 FomulaSimplifications, 1856 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5116 FormulaSimplificationTreeSizeReductionInter, 4.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 10151 NumberOfCodeBlocks, 9374 NumberOfCodeBlocksAsserted, 279 NumberOfCheckSat, 10121 ConstructedInterpolants, 0 QuantifiedInterpolants, 11654549 SizeOfPredicates, 87 NumberOfNonLiveVariables, 9433 ConjunctsInSsa, 612 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 343422/397502 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...