./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-new/half_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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/loop-new/half_true-unreach-call_true-termination.i -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 14367fbcb63815bbc35abe1c5a8e938762f99ead ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 06:15:51,525 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 06:15:51,527 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 06:15:51,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 06:15:51,542 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 06:15:51,545 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 06:15:51,547 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 06:15:51,550 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 06:15:51,552 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 06:15:51,560 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 06:15:51,560 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 06:15:51,564 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 06:15:51,565 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 06:15:51,566 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 06:15:51,567 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 06:15:51,568 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 06:15:51,572 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 06:15:51,576 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 06:15:51,581 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 06:15:51,583 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 06:15:51,586 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 06:15:51,588 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 06:15:51,592 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 06:15:51,592 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 06:15:51,592 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 06:15:51,593 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 06:15:51,594 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 06:15:51,597 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 06:15:51,598 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 06:15:51,602 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 06:15:51,602 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 06:15:51,603 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 06:15:51,603 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 06:15:51,603 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 06:15:51,607 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 06:15:51,608 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 06:15:51,609 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 06:15:51,639 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 06:15:51,639 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 06:15:51,641 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 06:15:51,641 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 06:15:51,641 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 06:15:51,641 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 06:15:51,641 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 06:15:51,642 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 06:15:51,643 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 06:15:51,643 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 06:15:51,643 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 06:15:51,643 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 06:15:51,643 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 06:15:51,644 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 06:15:51,644 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 06:15:51,644 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 06:15:51,644 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 06:15:51,644 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 06:15:51,645 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 06:15:51,645 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 06:15:51,645 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 06:15:51,645 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 06:15:51,645 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 06:15:51,645 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 06:15:51,647 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 06:15:51,647 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 06:15:51,647 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 06:15:51,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 06:15:51,648 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 -> 14367fbcb63815bbc35abe1c5a8e938762f99ead [2018-12-31 06:15:51,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 06:15:51,717 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 06:15:51,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 06:15:51,726 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 06:15:51,726 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 06:15:51,727 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-new/half_true-unreach-call_true-termination.i [2018-12-31 06:15:51,800 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6280f5db4/75b1ec41dbe342e3a22412fe88564406/FLAGd9f78b84d [2018-12-31 06:15:52,271 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 06:15:52,272 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-new/half_true-unreach-call_true-termination.i [2018-12-31 06:15:52,278 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6280f5db4/75b1ec41dbe342e3a22412fe88564406/FLAGd9f78b84d [2018-12-31 06:15:52,613 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6280f5db4/75b1ec41dbe342e3a22412fe88564406 [2018-12-31 06:15:52,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 06:15:52,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 06:15:52,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 06:15:52,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 06:15:52,625 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 06:15:52,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453557c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52, skipping insertion in model container [2018-12-31 06:15:52,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 06:15:52,658 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 06:15:52,875 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 06:15:52,880 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 06:15:52,900 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 06:15:52,919 INFO L195 MainTranslator]: Completed translation [2018-12-31 06:15:52,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52 WrapperNode [2018-12-31 06:15:52,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 06:15:52,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 06:15:52,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 06:15:52,922 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 06:15:52,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 06:15:52,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 06:15:52,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 06:15:52,963 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 06:15:52,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (1/1) ... [2018-12-31 06:15:52,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 06:15:52,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 06:15:52,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 06:15:52,997 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 06:15:52,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (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 [2018-12-31 06:15:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 06:15:53,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 06:15:53,353 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 06:15:53,354 INFO L280 CfgBuilder]: Removed 7 assue(true) statements. [2018-12-31 06:15:53,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:15:53 BoogieIcfgContainer [2018-12-31 06:15:53,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 06:15:53,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 06:15:53,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 06:15:53,359 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 06:15:53,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 06:15:52" (1/3) ... [2018-12-31 06:15:53,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132b2b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 06:15:53, skipping insertion in model container [2018-12-31 06:15:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:15:52" (2/3) ... [2018-12-31 06:15:53,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132b2b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 06:15:53, skipping insertion in model container [2018-12-31 06:15:53,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:15:53" (3/3) ... [2018-12-31 06:15:53,364 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-12-31 06:15:53,373 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 06:15:53,381 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 06:15:53,397 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 06:15:53,432 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 06:15:53,433 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 06:15:53,433 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 06:15:53,433 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 06:15:53,434 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 06:15:53,434 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 06:15:53,434 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 06:15:53,434 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 06:15:53,434 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 06:15:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-12-31 06:15:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-31 06:15:53,458 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:53,459 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-31 06:15:53,462 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 922384074, now seen corresponding path program 1 times [2018-12-31 06:15:53,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:53,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:53,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:53,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:53,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:53,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:15:53,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 06:15:53,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 06:15:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 06:15:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 06:15:53,611 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-12-31 06:15:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:53,628 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2018-12-31 06:15:53,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 06:15:53,630 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-12-31 06:15:53,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:53,641 INFO L225 Difference]: With dead ends: 21 [2018-12-31 06:15:53,641 INFO L226 Difference]: Without dead ends: 9 [2018-12-31 06:15:53,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 06:15:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-31 06:15:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-31 06:15:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-31 06:15:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-12-31 06:15:53,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-12-31 06:15:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:53,678 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-12-31 06:15:53,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 06:15:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-12-31 06:15:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-31 06:15:53,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:53,679 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-31 06:15:53,679 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:53,680 INFO L82 PathProgramCache]: Analyzing trace with hash 922056373, now seen corresponding path program 1 times [2018-12-31 06:15:53,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:53,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:53,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:53,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:53,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:53,979 WARN L181 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-12-31 06:15:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:54,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:15:54,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 06:15:54,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 06:15:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 06:15:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 06:15:54,236 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 6 states. [2018-12-31 06:15:54,466 WARN L181 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-12-31 06:15:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:54,634 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2018-12-31 06:15:54,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 06:15:54,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-12-31 06:15:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:54,637 INFO L225 Difference]: With dead ends: 23 [2018-12-31 06:15:54,637 INFO L226 Difference]: Without dead ends: 19 [2018-12-31 06:15:54,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-31 06:15:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-31 06:15:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 10. [2018-12-31 06:15:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-31 06:15:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-12-31 06:15:54,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2018-12-31 06:15:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:54,644 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-31 06:15:54,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 06:15:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-12-31 06:15:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 06:15:54,645 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:54,646 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:15:54,646 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash -90418981, now seen corresponding path program 1 times [2018-12-31 06:15:54,647 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:54,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:54,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:54,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:54,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:54,959 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-12-31 06:15:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:54,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:15:54,980 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 [2018-12-31 06:15:55,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:55,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:15:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:55,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:15:55,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-12-31 06:15:55,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 06:15:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 06:15:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-31 06:15:55,288 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 11 states. [2018-12-31 06:15:55,546 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-31 06:15:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:55,801 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2018-12-31 06:15:55,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 06:15:55,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-12-31 06:15:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:55,804 INFO L225 Difference]: With dead ends: 23 [2018-12-31 06:15:55,804 INFO L226 Difference]: Without dead ends: 16 [2018-12-31 06:15:55,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-12-31 06:15:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-31 06:15:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2018-12-31 06:15:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-31 06:15:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-31 06:15:55,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-12-31 06:15:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:55,816 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-31 06:15:55,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 06:15:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-31 06:15:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-31 06:15:55,817 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:55,818 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-31 06:15:55,818 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash 811629813, now seen corresponding path program 2 times [2018-12-31 06:15:55,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:55,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:55,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:55,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:55,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:55,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:15:55,964 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 [2018-12-31 06:15:55,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 06:15:56,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 06:15:56,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 06:15:56,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:15:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:56,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:15:56,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-12-31 06:15:56,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 06:15:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 06:15:56,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 06:15:56,054 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2018-12-31 06:15:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:56,120 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-12-31 06:15:56,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 06:15:56,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-31 06:15:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:56,122 INFO L225 Difference]: With dead ends: 22 [2018-12-31 06:15:56,122 INFO L226 Difference]: Without dead ends: 15 [2018-12-31 06:15:56,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 06:15:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-31 06:15:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-12-31 06:15:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 06:15:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 06:15:56,126 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-12-31 06:15:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:56,127 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 06:15:56,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 06:15:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 06:15:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-31 06:15:56,127 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:56,128 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:15:56,128 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:56,128 INFO L82 PathProgramCache]: Analyzing trace with hash 868888115, now seen corresponding path program 1 times [2018-12-31 06:15:56,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:56,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:56,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:56,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 06:15:56,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:56,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:15:56,439 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 [2018-12-31 06:15:56,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:56,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:15:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:56,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:15:56,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-12-31 06:15:56,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 06:15:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 06:15:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-12-31 06:15:56,788 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 16 states. [2018-12-31 06:15:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:57,194 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2018-12-31 06:15:57,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 06:15:57,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-12-31 06:15:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:57,197 INFO L225 Difference]: With dead ends: 34 [2018-12-31 06:15:57,197 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 06:15:57,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2018-12-31 06:15:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 06:15:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-12-31 06:15:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 06:15:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-12-31 06:15:57,203 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2018-12-31 06:15:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:57,203 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-12-31 06:15:57,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 06:15:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-12-31 06:15:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-31 06:15:57,204 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:57,204 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:15:57,205 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash -606003725, now seen corresponding path program 2 times [2018-12-31 06:15:57,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:57,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:57,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:57,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:15:57,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:57,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:15:57,340 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 [2018-12-31 06:15:57,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 06:15:57,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 06:15:57,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 06:15:57,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:15:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:57,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:15:57,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 06:15:57,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 06:15:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 06:15:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-31 06:15:57,423 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2018-12-31 06:15:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:57,591 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-12-31 06:15:57,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 06:15:57,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-31 06:15:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:57,595 INFO L225 Difference]: With dead ends: 31 [2018-12-31 06:15:57,595 INFO L226 Difference]: Without dead ends: 24 [2018-12-31 06:15:57,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-31 06:15:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-31 06:15:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-31 06:15:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 06:15:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-12-31 06:15:57,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-12-31 06:15:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:57,601 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-12-31 06:15:57,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 06:15:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-12-31 06:15:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 06:15:57,602 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:57,603 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2018-12-31 06:15:57,603 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash 509630175, now seen corresponding path program 3 times [2018-12-31 06:15:57,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:57,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:57,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:57,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 06:15:57,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-31 06:15:58,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:15:58,069 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 [2018-12-31 06:15:58,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 06:15:58,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-31 06:15:58,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 06:15:58,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:15:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-31 06:15:58,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:15:58,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-12-31 06:15:58,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 06:15:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 06:15:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-31 06:15:58,247 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 14 states. [2018-12-31 06:15:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:15:58,585 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2018-12-31 06:15:58,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 06:15:58,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-12-31 06:15:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:15:58,588 INFO L225 Difference]: With dead ends: 36 [2018-12-31 06:15:58,588 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 06:15:58,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-12-31 06:15:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 06:15:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-31 06:15:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-31 06:15:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-12-31 06:15:58,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2018-12-31 06:15:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:15:58,595 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-12-31 06:15:58,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 06:15:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-12-31 06:15:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-31 06:15:58,596 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:15:58,596 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-31 06:15:58,596 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:15:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:15:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1279408559, now seen corresponding path program 4 times [2018-12-31 06:15:58,597 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:15:58,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:15:58,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:58,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 06:15:58,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:15:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:15:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-31 06:15:58,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:15:58,907 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 [2018-12-31 06:15:58,919 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 06:15:58,932 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 06:15:58,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 06:15:58,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:15:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:15:59,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:15:59,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2018-12-31 06:15:59,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 06:15:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 06:15:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2018-12-31 06:15:59,298 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-12-31 06:16:00,159 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 10 [2018-12-31 06:16:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:16:00,548 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-31 06:16:00,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 06:16:00,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-12-31 06:16:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:16:00,550 INFO L225 Difference]: With dead ends: 34 [2018-12-31 06:16:00,551 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 06:16:00,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 06:16:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 06:16:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 06:16:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 06:16:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 06:16:00,554 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-12-31 06:16:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:16:00,554 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 06:16:00,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 06:16:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 06:16:00,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 06:16:00,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 06:16:00,710 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 06:16:00,710 INFO L451 ceAbstractionStarter]: At program point L21(lines 10 22) the Hoare annotation is: true [2018-12-31 06:16:00,710 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2018-12-31 06:16:00,710 INFO L444 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse0 (* 2 ULTIMATE.start_main_~n~0)) (.cse1 (<= 0 ULTIMATE.start_main_~i~0))) (or (and (<= .cse0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 .cse0) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_main_~k~0) .cse1) (let ((.cse2 (+ ULTIMATE.start_main_~i~0 1))) (and (<= .cse0 .cse2) (<= .cse2 .cse0) (< ULTIMATE.start_main_~i~0 (+ (* 2 ULTIMATE.start_main_~k~0) 1)) .cse1)) (and (<= ULTIMATE.start_main_~n~0 0) (<= 0 ULTIMATE.start_main_~n~0) (= ULTIMATE.start_main_~i~0 0)))) [2018-12-31 06:16:00,710 INFO L448 ceAbstractionStarter]: For program point L15-4(lines 15 19) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-31 06:16:00,711 INFO L451 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2018-12-31 06:16:00,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 06:16:00 BoogieIcfgContainer [2018-12-31 06:16:00,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 06:16:00,729 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 06:16:00,729 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 06:16:00,729 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 06:16:00,729 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:15:53" (3/4) ... [2018-12-31 06:16:00,733 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 06:16:00,744 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-31 06:16:00,744 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 06:16:00,792 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 06:16:00,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 06:16:00,793 INFO L168 Benchmark]: Toolchain (without parser) took 8174.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 213.9 MB). Free memory was 952.7 MB in the beginning and 984.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 182.0 MB. Max. memory is 11.5 GB. [2018-12-31 06:16:00,794 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:16:00,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.19 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 06:16:00,795 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.29 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:16:00,796 INFO L168 Benchmark]: Boogie Preprocessor took 33.63 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:16:00,796 INFO L168 Benchmark]: RCFGBuilder took 357.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -181.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-31 06:16:00,797 INFO L168 Benchmark]: TraceAbstraction took 7373.18 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 992.1 MB in the end (delta: 131.4 MB). Peak memory consumption was 196.4 MB. Max. memory is 11.5 GB. [2018-12-31 06:16:00,798 INFO L168 Benchmark]: Witness Printer took 63.25 ms. Allocated memory is still 1.2 GB. Free memory was 992.1 MB in the beginning and 984.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2018-12-31 06:16:00,803 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.19 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 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 41.29 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.63 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 357.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -181.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7373.18 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 992.1 MB in the end (delta: 131.4 MB). Peak memory consumption was 196.4 MB. Max. memory is 11.5 GB. * Witness Printer took 63.25 ms. Allocated memory is still 1.2 GB. Free memory was 992.1 MB in the beginning and 984.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: ((((2 * n <= i && i <= 2 * n) && n <= k) && 0 <= i) || (((2 * n <= i + 1 && i + 1 <= 2 * n) && i < 2 * k + 1) && 0 <= i)) || ((n <= 0 && 0 <= n) && i == 0) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. SAFE Result, 7.2s OverallTime, 8 OverallIterations, 6 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 95 SDslu, 88 SDs, 0 SdLazy, 714 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 73 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, 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: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 55 HoareAnnotationTreeSize, 3 FomulaSimplifications, 257 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 88 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 204 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 190 ConstructedInterpolants, 0 QuantifiedInterpolants, 25974 SizeOfPredicates, 18 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 66/238 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...