./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loops/sum01_false-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/loops/sum01_false-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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 05:38:19,620 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 05:38:19,622 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 05:38:19,640 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 05:38:19,641 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 05:38:19,642 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 05:38:19,644 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 05:38:19,647 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 05:38:19,650 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 05:38:19,651 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 05:38:19,652 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 05:38:19,654 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 05:38:19,655 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 05:38:19,656 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 05:38:19,657 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 05:38:19,658 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 05:38:19,659 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 05:38:19,661 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 05:38:19,663 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 05:38:19,665 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 05:38:19,666 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 05:38:19,667 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 05:38:19,670 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 05:38:19,670 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 05:38:19,670 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 05:38:19,671 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 05:38:19,672 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 05:38:19,673 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 05:38:19,674 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 05:38:19,675 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 05:38:19,675 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 05:38:19,676 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 05:38:19,676 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 05:38:19,676 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 05:38:19,677 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 05:38:19,678 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 05:38:19,678 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 05:38:19,702 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 05:38:19,702 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 05:38:19,704 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 05:38:19,704 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 05:38:19,704 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 05:38:19,704 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 05:38:19,704 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 05:38:19,705 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 05:38:19,705 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 05:38:19,705 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 05:38:19,706 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 05:38:19,706 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 05:38:19,706 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 05:38:19,706 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 05:38:19,706 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 05:38:19,707 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 05:38:19,707 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 05:38:19,707 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 05:38:19,707 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 05:38:19,707 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 05:38:19,707 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 05:38:19,709 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 05:38:19,709 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 05:38:19,709 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 05:38:19,710 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 05:38:19,710 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 05:38:19,710 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 05:38:19,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 05:38:19,711 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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2018-12-31 05:38:19,758 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 05:38:19,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 05:38:19,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 05:38:19,781 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 05:38:19,782 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 05:38:19,782 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/sum01_false-unreach-call_true-termination.i [2018-12-31 05:38:19,845 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4622595a1/5520419fb54e4488ac6d3ee8c9f5792f/FLAGfd5c897fd [2018-12-31 05:38:20,299 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 05:38:20,300 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/sum01_false-unreach-call_true-termination.i [2018-12-31 05:38:20,306 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4622595a1/5520419fb54e4488ac6d3ee8c9f5792f/FLAGfd5c897fd [2018-12-31 05:38:20,669 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4622595a1/5520419fb54e4488ac6d3ee8c9f5792f [2018-12-31 05:38:20,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 05:38:20,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 05:38:20,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 05:38:20,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 05:38:20,684 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 05:38:20,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:20,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179a4755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20, skipping insertion in model container [2018-12-31 05:38:20,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:20,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 05:38:20,723 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 05:38:20,946 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:38:20,954 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 05:38:20,974 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:38:20,993 INFO L195 MainTranslator]: Completed translation [2018-12-31 05:38:20,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20 WrapperNode [2018-12-31 05:38:20,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 05:38:20,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 05:38:20,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 05:38:20,995 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 05:38:21,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 05:38:21,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 05:38:21,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 05:38:21,036 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 05:38:21,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (1/1) ... [2018-12-31 05:38:21,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 05:38:21,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 05:38:21,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 05:38:21,056 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 05:38:21,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (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 05:38:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 05:38:21,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 05:38:21,391 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 05:38:21,392 INFO L280 CfgBuilder]: Removed 7 assue(true) statements. [2018-12-31 05:38:21,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:38:21 BoogieIcfgContainer [2018-12-31 05:38:21,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 05:38:21,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 05:38:21,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 05:38:21,397 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 05:38:21,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 05:38:20" (1/3) ... [2018-12-31 05:38:21,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7404908c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:38:21, skipping insertion in model container [2018-12-31 05:38:21,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:38:20" (2/3) ... [2018-12-31 05:38:21,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7404908c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:38:21, skipping insertion in model container [2018-12-31 05:38:21,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:38:21" (3/3) ... [2018-12-31 05:38:21,400 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-12-31 05:38:21,408 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 05:38:21,416 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 05:38:21,432 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 05:38:21,466 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 05:38:21,467 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 05:38:21,467 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 05:38:21,467 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 05:38:21,467 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 05:38:21,468 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 05:38:21,468 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 05:38:21,468 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 05:38:21,468 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 05:38:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2018-12-31 05:38:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 05:38:21,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:21,491 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 05:38:21,494 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2018-12-31 05:38:21,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:21,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:21,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:21,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:21,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:21,642 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 05:38:21,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:38:21,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 05:38:21,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 05:38:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 05:38:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 05:38:21,669 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2018-12-31 05:38:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:21,685 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2018-12-31 05:38:21,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 05:38:21,688 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2018-12-31 05:38:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:21,698 INFO L225 Difference]: With dead ends: 18 [2018-12-31 05:38:21,699 INFO L226 Difference]: Without dead ends: 8 [2018-12-31 05:38:21,702 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 05:38:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-31 05:38:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-31 05:38:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-31 05:38:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-12-31 05:38:21,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2018-12-31 05:38:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:21,733 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-31 05:38:21,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 05:38:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-12-31 05:38:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 05:38:21,734 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:21,734 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 05:38:21,735 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2018-12-31 05:38:21,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:21,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:21,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:21,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:21,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:21,881 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 05:38:21,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:38:21,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 05:38:21,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 05:38:21,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 05:38:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 05:38:21,885 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-12-31 05:38:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:22,001 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-12-31 05:38:22,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 05:38:22,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-31 05:38:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:22,003 INFO L225 Difference]: With dead ends: 15 [2018-12-31 05:38:22,003 INFO L226 Difference]: Without dead ends: 11 [2018-12-31 05:38:22,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 05:38:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-31 05:38:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-31 05:38:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-31 05:38:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-12-31 05:38:22,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2018-12-31 05:38:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:22,008 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-12-31 05:38:22,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 05:38:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-12-31 05:38:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-31 05:38:22,009 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:22,009 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:22,009 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2018-12-31 05:38:22,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:22,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:22,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:22,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:22,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:22,401 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-12-31 05:38:22,544 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-12-31 05:38:22,578 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 05:38:22,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:22,578 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 05:38:22,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:22,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:23,138 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 05:38:23,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:23,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-31 05:38:23,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 05:38:23,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 05:38:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-12-31 05:38:23,163 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 13 states. [2018-12-31 05:38:23,838 WARN L181 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-12-31 05:38:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:24,031 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2018-12-31 05:38:24,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 05:38:24,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2018-12-31 05:38:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:24,032 INFO L225 Difference]: With dead ends: 31 [2018-12-31 05:38:24,033 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 05:38:24,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-12-31 05:38:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 05:38:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2018-12-31 05:38:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-31 05:38:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-31 05:38:24,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2018-12-31 05:38:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:24,040 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-31 05:38:24,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 05:38:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-31 05:38:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-31 05:38:24,041 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:24,041 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2018-12-31 05:38:24,041 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1111984220, now seen corresponding path program 2 times [2018-12-31 05:38:24,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:24,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:24,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:24,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:24,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-31 05:38:24,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:24,283 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 05:38:24,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:38:24,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:38:24,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:38:24,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:24,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:24,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2018-12-31 05:38:24,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 05:38:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 05:38:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-12-31 05:38:24,649 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 18 states. [2018-12-31 05:38:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:25,501 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2018-12-31 05:38:25,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 05:38:25,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-12-31 05:38:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:25,502 INFO L225 Difference]: With dead ends: 34 [2018-12-31 05:38:25,503 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 05:38:25,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2018-12-31 05:38:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 05:38:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-12-31 05:38:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-31 05:38:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-12-31 05:38:25,511 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2018-12-31 05:38:25,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:25,511 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-12-31 05:38:25,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 05:38:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-12-31 05:38:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-31 05:38:25,513 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:25,513 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:25,514 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1125442374, now seen corresponding path program 1 times [2018-12-31 05:38:25,515 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:25,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:25,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:25,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:38:25,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:25,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:25,599 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 05:38:25,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:25,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:25,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:25,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 05:38:25,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 05:38:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 05:38:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:38:25,651 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2018-12-31 05:38:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:25,708 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-12-31 05:38:25,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 05:38:25,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-12-31 05:38:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:25,711 INFO L225 Difference]: With dead ends: 33 [2018-12-31 05:38:25,711 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 05:38:25,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:38:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 05:38:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-31 05:38:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-31 05:38:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-31 05:38:25,718 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-12-31 05:38:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:25,719 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-31 05:38:25,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 05:38:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-12-31 05:38:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 05:38:25,721 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:25,721 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:25,721 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash -622858099, now seen corresponding path program 2 times [2018-12-31 05:38:25,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:25,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:25,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:25,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:38:25,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:25,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:25,847 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 05:38:25,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:38:25,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:38:25,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:38:25,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:25,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:25,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 05:38:25,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 05:38:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 05:38:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:38:25,917 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-12-31 05:38:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:25,979 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-31 05:38:25,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 05:38:25,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-31 05:38:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:25,982 INFO L225 Difference]: With dead ends: 36 [2018-12-31 05:38:25,983 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 05:38:25,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:38:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 05:38:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-12-31 05:38:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-31 05:38:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-12-31 05:38:25,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-12-31 05:38:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:25,988 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-12-31 05:38:25,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 05:38:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-12-31 05:38:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-31 05:38:25,990 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:25,990 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:25,991 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:25,991 INFO L82 PathProgramCache]: Analyzing trace with hash -390715430, now seen corresponding path program 3 times [2018-12-31 05:38:25,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:25,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:25,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:25,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:38:25,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:26,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:26,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:38:26,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 05:38:26,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-12-31 05:38:26,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:38:26,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:26,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:26,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-31 05:38:26,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 05:38:26,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 05:38:26,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-31 05:38:26,268 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2018-12-31 05:38:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:26,342 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-12-31 05:38:26,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 05:38:26,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-31 05:38:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:26,345 INFO L225 Difference]: With dead ends: 39 [2018-12-31 05:38:26,345 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 05:38:26,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-31 05:38:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 05:38:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-31 05:38:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-31 05:38:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-31 05:38:26,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2018-12-31 05:38:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:26,354 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-31 05:38:26,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 05:38:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-31 05:38:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-31 05:38:26,355 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:26,355 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:26,355 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash 474190189, now seen corresponding path program 4 times [2018-12-31 05:38:26,356 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:26,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:26,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:26,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:38:26,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:26,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:26,481 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 05:38:26,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 05:38:26,508 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 05:38:26,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:38:26,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:26,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:26,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 05:38:26,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 05:38:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 05:38:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-31 05:38:26,547 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-12-31 05:38:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:26,626 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-31 05:38:26,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 05:38:26,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-12-31 05:38:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:26,630 INFO L225 Difference]: With dead ends: 42 [2018-12-31 05:38:26,630 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 05:38:26,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-31 05:38:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 05:38:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-12-31 05:38:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-31 05:38:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-12-31 05:38:26,636 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-12-31 05:38:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:26,638 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-12-31 05:38:26,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 05:38:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-12-31 05:38:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-31 05:38:26,651 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:26,651 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:26,651 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1368677114, now seen corresponding path program 5 times [2018-12-31 05:38:26,655 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:26,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:26,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:26,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:38:26,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:38:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:26,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:38:26,819 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) [2018-12-31 05:38:26,837 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 05:38:26,874 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-31 05:38:26,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:38:26,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:38:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:38:26,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:38:26,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-31 05:38:26,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 05:38:26,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 05:38:26,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-31 05:38:26,909 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2018-12-31 05:38:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:38:27,260 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-31 05:38:27,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 05:38:27,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-12-31 05:38:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:38:27,262 INFO L225 Difference]: With dead ends: 45 [2018-12-31 05:38:27,262 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 05:38:27,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-31 05:38:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 05:38:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-31 05:38:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-31 05:38:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-12-31 05:38:27,269 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2018-12-31 05:38:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:38:27,271 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-12-31 05:38:27,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 05:38:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-12-31 05:38:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-31 05:38:27,272 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:38:27,273 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2018-12-31 05:38:27,273 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:38:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:38:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411891, now seen corresponding path program 6 times [2018-12-31 05:38:27,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:38:27,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:38:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:27,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:38:27,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:38:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 05:38:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 05:38:27,327 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 05:38:27,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 05:38:27 BoogieIcfgContainer [2018-12-31 05:38:27,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 05:38:27,355 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 05:38:27,355 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 05:38:27,356 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 05:38:27,356 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:38:21" (3/4) ... [2018-12-31 05:38:27,360 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 05:38:27,421 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 05:38:27,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 05:38:27,423 INFO L168 Benchmark]: Toolchain (without parser) took 6749.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -179.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:38:27,424 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:38:27,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.02 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 05:38:27,425 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.67 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:38:27,425 INFO L168 Benchmark]: Boogie Preprocessor took 18.51 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:38:27,427 INFO L168 Benchmark]: RCFGBuilder took 337.01 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -132.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2018-12-31 05:38:27,428 INFO L168 Benchmark]: TraceAbstraction took 5961.30 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -58.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-31 05:38:27,429 INFO L168 Benchmark]: Witness Printer took 66.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:38:27,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 317.02 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 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 40.67 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.51 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 337.01 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -132.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5961.30 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -58.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Witness Printer took 66.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. UNSAFE Result, 5.8s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 71 SDslu, 149 SDs, 0 SdLazy, 470 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, 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, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 21218 SizeOfPredicates, 15 NumberOfNonLiveVariables, 336 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 135/756 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...